Agenda packet, second session — Malibu City Council, December 8, 2025 (part 2 of 3)

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offense.

SECTION 14. Section 15.16.040 of the Malibu Municipal Code is hereby amended to read as follows:

15.16.040 Fees.

Notwithstanding the provisions of Section 15.6.010, every fee provision set forth in Title 29, Mechanical Code, of the Los Angeles County Code is replaced with this section, providing that fees are as established in the current City of Malibu fee schedule approved by resolution of the city council.

SECTION 15. Section 15.18.010 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.18.010 Adoption of Energy Code.

Except as hereinafter provided, the California Energy Code, 2025 Edition (Part 6 of Title 24 of the California Code of Regulations) is hereby incorporated herein by reference as if fully set forth below and shall be known and may be cited as the Energy Code of the City of Malibu.

In the event of any conflict between provisions of the California Energy Code, 2025 Edition, or any amendment to the Energy Code contained in the Malibu Municipal Code, the provision contained in the later listed document shall control.

A copy of the California Energy Code, 2025 Edition, has been deposited in the office of the City Clerk of the City of Malibu and shall be at all times maintained by the City Clerk for use and examination by the public.

SECTION 16. Section 15.18.020 and section 15.18.030 of the Malibu Municipal Code are hereby amended to read as follows:

15.18.020. Purpose.

This purpose of this Chapter is to promote the health, safety and welfare of the City’s residents, workers and visitors by minimizing the use and waste of energy in the construction and operation of the City’s building stock. This Chapter sets forth minimum energy efficiency standards within the City for all new residential and nonresidential construction.

Section 15.18.030 Violations—Penalties.

Every person violating any provision of the Energy Code, 2025 Edition and appendices, adopted by reference by Section 15.18.010, or of any permit or license granted thereunder, or any rules or regulations promulgated pursuant thereto, is guilty of a misdemeanor. Upon conviction thereof he or she shall be punishable by a fine not to exceed one thousand dollars ($1,000.00) or imprisonment not to exceed six months, or by both such fine and imprisonment.

The imposition of such penalty for any violation shall not excuse the violation or permit it to continue. Each day that a violation occurs shall constitute a separate offense. 31 Ordinance No. 531

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SECTION 17. Section 15.24.010 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.24.010 Adoption of Green Building Standards Code.

Except as hereinafter provided, Title 31, Green Building Standards Code, of the Los Angeles County Code, adopting the California Green Building Standards Code, 2025 Edition (Part 11 of Title 24 of the California Code of Regulations), as amended and in effect on January 1, 2026, is adopted herein by reference as if fully set forth below, and shall be known and may be cited as the Green Building Code of the City of Malibu.

In the event of any conflict between provisions of the California Green Building Standards Code, 2025 Edition, Title 31 of the Los Angeles County Code, or any amendment to the Green Building Standards Code contained in the Malibu Municipal Code, the provision contained in the later listed document shall control.

A copy of Title 31 of the Los Angeles County Code and the California Green Building Standards Code, 2025 Edition, have been deposited in the office of the City Clerk of the City of Malibu and shall be at all times maintained by the City Clerk for use and examination by the public.

SECTION 18. Section 15.24.040 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.24.040 Violations—Penalties.

Every person violating any provision of the California Green Building Standards Code, 2025 Edition and appendices, adopted by reference by Section 15.24.010, or of any permit or license granted thereunder, or any rules or regulations promulgated pursuant thereto, is guilty of a misdemeanor. Upon conviction thereof he or she shall be punishable by a fine not to exceed one thousand dollars ($1,000.00) or imprisonment not to exceed six months, or by both such fine and imprisonment. The imposition of such penalty for any violation shall not excuse the violation or permit it to continue. Each day that a violation occurs shall constitute a separate offense.

SECTION 19. Section 15.24.050 of the Malibu Municipal Code is hereby repealed.

SECTION 20. Section 15.28.010 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.28.010 Adoption of Residential Code.

Except as hereinafter changed, Title 30, Residential Code, of the Los Angeles County Code, incorporating Sections 102 through 119 of Chapter 1, Section 1207 of Chapter 12, Chapter 67, 68, 69, 98, 99 and Appendix J of Title 26 of the Los Angeles County Code and adopting Chapters 2 through 10, Chapter 44, and Appendices H, Q, S, and X of the California Residential Code, 2025 Edition, is adopted herein by reference as if fully set forth below, and shall be known the Residential Code of the City of Malibu. 32 Ordinance No. 531

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In the event of any conflict between provisions of the California Residential Code, 2025 Edition, Title 30 of the Los Angeles County Code, or any amendment to the Residential Code contained in the Malibu Municipal Code, the provision contained in the later listed document shall control.

A copy of Title 30 of the Los Angeles County Code and the California Residential Code, 2025 Edition, have been deposited in the office of the City Clerk of the City of Malibu and shall be at all times maintained by the City Clerk for use and examination by the public.

SECTION 21. Section 15.28.020 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.28.020 Definitions.

Notwithstanding the provisions of Section 15.28.010, the definitions in Section 15.04.020 are adopted by reference and incorporated into this Chapter 15.28 as if fully set forth below.

SECTION 22. Section 15.28.040 of the Malibu Municipal Code is hereby amended to read as follows:

Section 15.28.040 Violations—Penalties.

Every person violating any provision of the Title 30 of the Los Angeles County Code and appendices, adopted by reference by Section 15.28.010, or of any permit or license granted thereunder, or any rules or regulations promulgated pursuant thereto, is guilty of a misdemeanor. Upon conviction thereof he or she shall be punishable by a fine not to exceed one thousand dollars ($1,000.00) or imprisonment not to exceed six months, or by both such fine and imprisonment. The imposition of such penalty for any violation shall not excuse the violation or permit it to continue. Each day that a violation occurs shall constitute a separate offense.

SECTION 23. Section 8.12.010 of the Malibu Municipal Code is hereby amended to read as follows:

Section 8.12.010 Adoption of Fire Code.

Except as hereinafter provided, the California Fire Code, 2025 Edition (Part 9 of Title 24 of the California Code of Regulations) is hereby incorporated herein by reference as if fully set forth below and shall be known and may be cited as the Fire Code of the City of Malibu.

In the event of any conflict between provisions of the California Fire Code, 2025 Edition or any amendment to the Fire Code contained in the Malibu Municipal Code, the provision contained in the later listed document shall control.

A copy of the California Fire Code, 2025 Edition, has been deposited in the office of the City Clerk of the City of Malibu and shall be at all times maintained by the City Clerk for use and 33 Ordinance No. 531

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examination by the public.

SECTION 24. Section 8.12.020 of the Malibu Municipal Code is hereby amended to read as follows:

Section 8.12.020 Violation—Penalty.

Every person violating any provision of the California Fire Code, 2025 Edition and appendices, adopted by reference by Section 8.12.010, or of any permit or license granted thereunder, or any rules or regulations promulgated pursuant thereto, is guilty of a misdemeanor. Upon conviction thereof he or she shall be punishable by a fine not to exceed one thousand dollars ($1,000.00) or imprisonment not to exceed six months, or by both such fine and imprisonment.

The imposition of such penalty for any violation shall not excuse the violation or permit it to continue. Each day that a violation occurs shall constitute a separate offense.

SECTION 25. Section 15.06.010 of the Malibu Municipal Code is hereby added to read as follows:

Section 15.06.010 Adoption of Existing Building Code.

Except as hereinafter provided, Title 33, Existing Building Code, of the Los Angeles County Code, adopting by reference the California Existing Building Code, 2025 Edition as amended is adopted herein by reference as if fully set forth below, and shall be known and may be cited as the Existing Building Code of the City of Malibu.

In the event of any conflict between provisions of the California Existing Building Code, 2025 Edition, Title 33 of the Los Angeles County Code, or any amendment to the Existing Building Code contained in the Malibu Municipal Code, the provision contained in the later listed document shall control.

A copy of Title 33 of the Los Angeles County Code and the California Existing Building Code, 2025 Edition, has been deposited in the office of the City Clerk of the City of Malibu and shall be at all times maintained by the City Clerk for use and examination by the public.

SECTION 26. Section 15.06.020 of the Malibu Municipal Code is hereby added to read as follows:

Section 15.06.020 Definitions.

Notwithstanding the provisions of Section 15.28.010, the definitions in Section 15.04.020 are adopted by reference and incorporated into this Chapter 15.28 as if fully set forth below.

SECTION 27. Section 15.06.030 of the Malibu Municipal Code is hereby added to read as follows:

Section 15.06.030 Existing Building Code Fees.

Fees are as established by the current City of Malibu fee schedule.

SECTION 28. Section 15.06.040 of the Malibu Municipal Code is hereby added to read as follows:
34 Ordinance No. 531

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Section 15.06.040 Violation—Penalty.

Every person violating any provision of the Existing Building Code, adopted by Section

15.06.010, or of any permit or license granted thereunder, or any rules or regulations promulgated pursuant thereto, is guilty of a misdemeanor. Upon conviction thereof he or she shall be punishable by a fine not to exceed one thousand dollars ($1,000.00) or imprisonment not to exceed six months, or by both such fine and imprisonment. The imposition of such penalty for any violation shall not excuse the violation or permit it to continue. Each day that a violation occurs shall constitute a separate offense.

SECTION 29. Severability.

Should any section, subsection, clause, or provision of this Ordinance for any reason be held to be invalid or unconstitutional, such invalidity or unconstitutionality shall not affect the validity or constitutionality of the remaining portions of this Ordinance; it being hereby expressly declared that this Ordinance, and each section, subsection, sentence, clause, and phrase hereof would have been prepared, proposed, approved, and ratified irrespective of the fact that any one or more sections, subsections, sentences, clauses, or phrases be declared invalid or unconstitutional.

SECTION 30. Effective Date.

This Ordinance shall take effect 30 days after its passage and adoption pursuant to California Government Code section 36937 and shall apply to all projects submitted to the City for plan check and/or permit application on or after that date.

SECTION 31. California Environmental Quality Act.

The City Council determines that this Ordinance is exempt from review under the California Environmental Quality Act (California Public Resources Code §§ 21000 et seq., "CEQA") and the regulations promulgated thereunder (14 California Code of Regulations §§ 15000 et seq., the "State CEQA Guidelines") because it does not meet the definition of a “project” under Public Resources Code § 21065 and is covered by the common sense exception under 14 California Code of Regulations § 15061(b)(3) as it consists only of minor revisions and clarifications to an existing code of construction related regulations and specification of procedures related thereto and will not have the effect of deleting or substantially changing any regulatory standards or findings required therefor.

This ordinance is an action being taken for enhanced protection of the environment and does not have a reasonably foreseeable direct or indirect physical change on the environment or the potential to cause significant effects on the environment.

SECTION 32. Certification.

The City Clerk shall certify the adoption of this Ordinance.

The City Clerk shall file a certified copy of this Ordinance with the California Building Standards Commission.
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PASSED, APPROVED AND ADOPTED this ________ day of December 2025. ____________________________
MARIANNE RIGGINS, Mayor
ATTEST:
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KELSEY PETTIJOHN, City Clerk
(seal)
Date: _______________________
APPROVED AS TO FORM:
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TREVOR RUSIN, Interim City Attorney
36 1
ATTACHMENT 3
Code Adoption 2026 Findings

BUILDING CODE AMENDMENTS
Code Section Condition Explanation of Amendment
106.3.2, Item 2 Administrative The greater Los Angeles/Long Beach region is situated over a vast array of earthquake fault systems capable of producing major earthquakes, including, but not limited to, the 1994 Northridge Earthquake. Due to the risk of geologic activities in the Southern California area, buildings and structures require a high level of performance. This existing local enforcement provision limits the height of fences built without a permit in order to reduce the chance of failure of fences that may be built improperly. Because fences that are exempt from permits are constructed without the benefit of inspection to verify that proper construction methods are used, it has been observed that fences are commonly built without proper footings and/or reinforcement, which causes leaning and collapse of the fence.
701A.1 Climatic Clarifies the application of Chapter 7A to include additions, alterations, and/or relocated buildings. Many areas of the County have been designated as Fire Hazard Severity Zones due to low humidity, strong winds, and dry vegetation. Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.
701A.3 Climatic Clarifies the application of Chapter 7A to include additions, alterations, and/or relocated buildings. Many areas of the County have been designated as Fire Hazard Severity Zones due to the increased risk of fire caused by low humidity, strong winds, and dry vegetation. Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.
701A.3.1 Climatic Clarifies the application of Chapter 7A to include additions, alterations, and/or relocated buildings. Many areas of the County have been designated as Fire Hazard Severity Zones due to the increased risk of fire caused by low humidity, strong winds, and dry vegetation. Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.
703A.5.2 and
703A.5.2.2
Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in the County caused by low humidity, strong winds, and dry vegetation in high fire severity zones.
704A.4 Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in the County caused by low humidity, strong winds, and dry vegetation in high fire severity zones.
705A.2 Climatic Disallows the use of wood-shingle/wood-shake roofs and requires the use of Class A roof covering due to the increased risk of fire in the County caused by low humidity, strong winds, and dry vegetation in high fire severity zones.
1031.2.1 Geological The greater Los Angeles/Long Beach region is a densely populated area having buildings constructed over and near a vast array of earthquake fault systems capable of producing major earthquakes, including, but not 37 2
ATTACHMENT 3
Code Section Condition Explanation of Amendment
limited to, the 1994 Northridge Earthquake. The proposed amendment is intended to prevent occupants from being trapped in a building and to allow rescue workers to easily enter after an earthquake.

Table 1507.3.7 Geological Table amended to require proper anchorage for clay or concrete tiles from sliding or rotating due to the increased risk of significant earthquakes in the County. This amendment incorporates the design provisions developed based on detailed study of the 1994 Northridge and the 1971 Sylmar earthquakes.
1613.5 and
1613.5.1
Geological Observed damages to one- and two-family dwellings of light frame construction after the Northridge Earthquake may have been partially attributed to vertical irregularities common to this type of occupancy and construction. In an effort to improve quality of construction and incorporate lesson learned from studies after the Northridge Earthquake, the proposed modification to ASCE 7-16, Section 12.2.3.1, Exception 3, by limiting the number of stories and height of the structure to two stories will significantly minimize the impact of vertical irregularities and concentration of inelastic behavior from mixed structural systems. This proposed amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County. 1613.5.2 Geological A joint Structural Engineers Association of Southern California (SEAOSC), Los Angeles County and Los Angeles City Task Force investigated the performance of concrete and masonry construction with flexible wood diaphragm failures after the Northridge earthquake. It was concluded at that time that continuous ties are needed at specified spacing to control cross grain tension in the interior of the diaphragm.

Additionally, there was a need to limit subdiaphragm allowable shear loads to control combined orthogonal stresses within the diaphragm.

Additional requirements are provided to help clarify the role and duties of the structural observer and the method of reporting and correcting observed deficiencies to the Building Official. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
1704.6.1 Geological With the higher seismic demand placed on buildings and structures in this region, the language in section 1704.6.1, Item 3, of the California Building Code would permit many low-rise buildings and structures with complex structural elements to be constructed without the benefit of a structural observation. By requiring a registered design professional to observe the construction, the quality of the observation for major structural elements and connections that affect the vertical and lateral load resisting systems of the structure will be greatly increased. An exception is provided to permit simple structures and buildings to be 39 4
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Code Section Condition Explanation of Amendment
excluded. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County. 1705.3 Geological Results from studies after the 1994 Northridge Earthquake indicated that a significant portion of the damage was attributable to lack of quality control during construction resulting in poor performance of the building or structure. Therefore, the amendment restricts the exceptions to the requirement for special inspection. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
1705.13 Geological In Southern California, very few detached one- or twofamily dwellings not exceeding two stories above grade plane are built as "box-type" structures specially for those in hillside areas and near the oceanfront.

Many with steel moment frames or braced frames, and/or cantilevered columns, can still be shown as "regular" structures by calculations. With the higher seismic demand placed on buildings and structures in this region, the language in section 1705.13, Item 3, of the California Building Code would permit many detached one- or two-family dwellings not exceeding two stories above grade plane with complex structural elements to be constructed without the benefit of special inspections. By requiring special inspections, the quality of major structural elements and connections that affect the vertical and lateral load resisting systems of the structure will be greatly increased. The exception should only be allowed for detached one- or two-family dwellings not exceeding two stories above grade plane assigned to Seismic Design Categories A, B, and C.
1807.1.4 Climatic
Geological
No substantiating data has been provided to show that a wood foundation is effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effect of constant moisture in the soil and wooddestroying organisms. Wood retaining walls, when they are not properly treated and protected against deterioration, have performed very poorly and have led to slope failures. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. The proposed amendment takes the necessary precautionary steps to reduce or eliminate potential problems that may result by using wood foundations that experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wood-destroying organisms. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the local climate and the increased risk of significant earthquakes in the County.
1807.1.6 Geological With the higher seismic demand placed on buildings and structures in this region, it is necessary to take precautionary steps to reduce or 40 5
ATTACHMENT 3
Code Section Condition Explanation of Amendment
eliminate potential problems that may result by following prescriptive design provisions that do not take into consideration the surrounding environment. Plain concrete performs poorly in withstanding the cyclic forces resulting from seismic events. In addition, no substantiating data has been provided to show that under-reinforced foundation walls are effective in resisting seismic loads, and may potentially lead to a higher risk of failure. It is important that the benefit and expertise of a registered design professional be obtained to properly analyze the structure and take these issues into consideration. This amendment is a continuation of an amendment adopted during previous code adoption cycles. 1807.2 Climatic,
Geological
No substantiating data has been provided to show that wood foundation systems are effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effects of constant moisture in the soil and wooddestroying organisms. Wood foundation systems not properly treated and protected against deterioration have performed very poorly and have led to slope failures. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. The proposed amendment takes the precautionary steps to reduce or eliminate potential problems that may result in using wood foundation systems that experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wood-destroying organisms. This proposed amendment is a continuation of an amendment adopted during previous code adoption cycles. 1807.3.1 Climatic
Geological
No substantiating data has been provided to show that wood foundation systems are effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effects of constant moisture in the soil and wooddestroying organisms. Wood foundation systems not properly treated and protected against deterioration have performed very poorly and have led to slope failures. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. The proposed amendment takes the precautionary steps to reduce or eliminate potential problems that may result in using wood foundation systems that experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wood-destroying organisms. This proposed amendment is a continuation of an amendment adopted during previous code adoption cycles. 1809.3 and
Figure 1809.3
Geological With the higher seismic demand placed on buildings and structures in this region, it is necessary to take precautionary steps to reduce or eliminate potential problems that may result for under-reinforced footings located on sloped surfaces. Requiring minimum reinforcement for 41 6
ATTACHMENT 3
Code Section Condition Explanation of Amendment
stepped footings is intended to address the problem of poor performance of plain or under-reinforced footings during a seismic event. This amendment is a continuation of an amendment adopted during previous code adoption cycles.
1809.7 and
Table 1809.7
Geological No substantiating data has been provided to show that under-reinforced footings are effective in resisting seismic loads, and therefore they may potentially lead to a higher risk of failure. This amendment requires minimum reinforcement in continuous footings to address the problem of poor performance of plain or under-reinforced footings during a seismic event. With the higher seismic demand placed on buildings and structures in this region, it is necessary to take precautionary steps to reduce or eliminate potential problems that may result by following prescriptive design provisions for footings that do not take into consideration the surrounding environment. It is important that the benefit and expertise of a registered design professional be obtained to properly analyze the structure and take these factors into consideration.

This amendment reflects the recommendations by the SEAOSC and the Los Angeles City Joint Task Force, which investigated the performance deficiencies observed in the 1994 Northridge Earthquake. This amendment is a continuation of an amendment adopted during previous code adoption cycles.
1809.12 Climatic
Geological
No substantiating data has been provided to show that timber footings are effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effects of constant moisture in the soil and wooddestroying organisms. Timber footings, when they are not properly treated and protected against deterioration, have performed very poorly. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. The proposed amendment takes the necessary precautionary steps to reduce or eliminate potential problems, which may result by using timber footings that experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wood-destroying organisms. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the local climate and the increased risk of significant earthquakes in the County. 1810.3.2.4 Climatic
Geological
No substantiating data has been provided to show that timber footings are effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effects of constant moisture in the soil and wooddestroying organisms. Timber footings, when they are not properly treated and protected against deterioration, have performed very poorly. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood 42 7
ATTACHMENT 3
Code Section Condition Explanation of Amendment
that makes it suitable for both seismic events and wet applications. The proposed amendment takes the necessary precautionary steps to reduce or eliminate potential problems that may result by using timber footings that experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wood-destroying organisms. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the local climate and the increased risk of significant earthquakes in the County. 1905.1 Geological This amendment is intended to carry over critical provisions for the design of concrete columns in moment frames from the legacy 1997 Uniform Building Code. Increased confinement is critical to the integrity of such columns and these modifications ensure that it is provided when certain thresholds are exceeded. In addition, this amendment carries over from the legacy 1997 Uniform Building Code a critical provision for the design of concrete shear walls. It essentially limits the use of very highly gravity-loaded walls in being included in the seismic load resisting system, since their failure could have catastrophic effect on the building.

Furthermore, this amendment was incorporated in the code based on observations from the 1994 Northridge Earthquake. Rebar placed in very thin concrete topping slabs have been observed in some instances to have popped out of the slab due to insufficient concrete coverage.

This modification ensures that critical boundary and collector rebars are placed in sufficiently thick topping slab to prevent buckling of such reinforcements. This proposed amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
1905.1.7 Geological This amendment requires minimum reinforcement in continuous footings to address the problem of poor performance of plain or under-reinforced footings during a seismic event. This amendment reflects the recommendations by the SEAOSC and the Los Angeles City Joint Task Force, which investigated the poor performance observed in the 1994 Northridge Earthquake. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
1905.1.8 through
1905.1.11
Geological These amendments are intended to carry over critical provisions for the design of concrete columns in moment frames from the Uniform Building Code (UBC). Increased confinement is critical to the integrity of such columns and these modifications ensure that it is provided when certain thresholds are exceeded. In addition, this amendment carries over from the UBC a critical provision for the design of concrete shear walls. It essentially limits the use of very highly gravity-loaded walls from being included in the seismic load resisting system, since their failure could have a catastrophic effect on the building. Furthermore, this amendment was incorporated into this Code based on observations from the 1994 Northridge Earthquake. Rebar placed in very thin concrete topping slabs 43 8
ATTACHMENT 3
Code Section Condition Explanation of Amendment
has been observed in some instances to have popped out of the slab due to insufficient concrete coverage. This modification ensures that critical boundary and collector rebars are placed in sufficiently thick slabs to prevent buckling of such reinforcements. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
2304.10.2 and
Table 2304.10.2
Geological Due to the high geologic activities in the Southern California area and the expected higher level of performance on buildings and structures, this proposed local amendment limits the use of staple fasteners in resisting or transferring seismic forces. In September 2007, limited cyclic testing data was provided to the ICC, Los Angeles Chapter Structural Code Committee, showing that stapled wood structural shear panels do not exhibit the same behavior as nailed wood structural shear panels.

The test results of stapled wood structural shear panels demonstrated much lower strength and drift than nailed wood structural shear panel test results. Therefore, the use of staples as fasteners to resist or transfer seismic forces shall not be permitted without being substantiated by cyclic testing. This amendment is a continuation of a similar amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
2304.10.3.1 Geological The overdriving of nails into the structural wood panels still remains a concern when pneumatic nail guns are used for wood structural panel shear wall nailing. Box nails were observed to cause massive and multiple failures of the typical 3/8-inch thick plywood during the 1994 Northridge Earthquake. The use of clipped head nails continues to be restricted from use in wood structural panel shear walls where the minimum nail head size must be maintained in order to minimize nails from pulling through sheathing materials. Clipped or mechanically driven nails used in wood structural panel shear wall construction were found to perform much worse in previous wood structural panel shear wall testing done at the University of California Irvine. The existing test results indicated that, under cyclic loading, the wood structural panel shear walls were less energy absorbent and less ductile. The panels reached ultimate load capacity and failed at substantially less lateral deflection than those using same-size handdriven nails. This amendment reflects the recommendations by the SEAOSC and the Los Angeles City Joint Task Force, which investigated the poor performance observed in the 1994 Northridge Earthquake. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County.
2304.12.2.8 Climatic
Geological
No substantiating data has been provided to show that wood used in retaining or crib walls is effective in supporting buildings and structures during a seismic event while being subject to deterioration caused by the combined detrimental effect of constant moisture in the soil and wooddestroying organisms. Wood used in retaining or crib walls, when it is 44 9
ATTACHMENT 3
Code Section Condition Explanation of Amendment
not properly treated and protected against deterioration, has performed very poorly. Most contractors are typically accustomed to construction in dry and temperate weather in the Southern California region and are not generally familiar with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. The proposed amendment takes the necessary precautionary steps to reduce or eliminate potential problems that may result by using wood in retaining or crib walls, which experience relatively rapid decay due to the fact that the region does not experience temperatures cold enough to destroy or retard the growth and proliferation of wooddestroying organisms. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the local climate and the increased risk of significant earthquakes in the County. 2305.4 Geological Many of the hold-down connectors currently in use do not have any acceptance report based on dynamic testing protocols. This amendment continues to limit the allowable capacity to 75% of the acceptance report value to provide an additional factor of safety for statically tested anchorage devices. Cyclic forces imparted on buildings and structures by seismic activity cause more damage than equivalent forces that are applied in a static manner. Steel plate washers will reduce the additional damage that can result when hold-down connectors are fastened to wood framing members. This amendment reflects the recommendations by the SEAOSC and the Los Angeles City Joint Task Force, which investigated the poor performance observed in the 1994 Northridge Earthquake. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County. 2306.2 2306.3
2307.2
2308.6.5.1
2308.6.5.2
Figure
2308.6.5.1 and
Figure
2308.6.5.2
Geological The SEAOSC and the Los Angeles City Joint Task Force that investigated damage to buildings and structures during the 1994 Northridge Earthquake recommended reducing allowable shear values in wood structural panel shear walls or diaphragms that were not substantiated by cyclic testing. That recommendation was consistent with a report to the Governor from the Seismic Safety Commission of the State of California recommending that code requirements be "more thoroughly substantiated with testing." The allowable shear values for wood structural panel shear walls or diaphragms fastened with staples are based on monotonic testing and do not take into consideration that earthquake forces load shear wall or diaphragm in a repeating and fully reversible manner. In September 2007, limited cyclic testing was conducted by a private engineering firm to determine if wood structural panels fastened with staples would exhibit the same behavior as wood structural panels fastened with common nails. The test result revealed that wood structural panels fastened with staples demonstrated much lower strength and stiffness than wood structural panels fastened with common nails. It was recommended that the use of staples as fasteners for wood structural panel shear walls or diaphragms not be permitted to resist seismic forces in structures assigned to Seismic Design Categories D, E, and F unless it can be substantiated by cyclic testing. 45 10
ATTACHMENT 3
Code Section Condition Explanation of Amendment
Furthermore, the cities and unincorporated areas within the greater Los Angeles/Long Beach region have taken extra measures to maintain the structural integrity of the framing of shear walls and diaphragms designed for high levels of seismic forces by requiring wood sheathing be applied directly over the framing members and prohibiting the use of panels placed over gypsum sheathing. This amendment is intended to prevent the undesirable performance of nails when gypsum board softens due to cyclic earthquake displacements and the nail ultimately does not have any engagement in a solid material within the thickness of the gypsum board. This amendment continues the previous amendment adopted during the 2007 code adoption cycle.
2308.6.8.1 Geological With the higher seismic demand placed on buildings and structures in this region, interior walls can easily be called upon to resist over half of the seismic loading imposed on simple buildings or structures. Without a continuous foundation to support the braced wall line, seismic loads would be transferred through other elements such as non-structural concrete slab floors, wood floors, etc. The purpose of this amendment is to limit the use of the exception to structures assigned to Seismic Design Category A, B, or C where lower seismic demands are expected.

Requiring interior braced walls be supported by continuous foundations is intended to reduce or eliminate the poor performance of buildings or structures. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County Table 2308.6.1 Geological This amendment specifies minimum sheathing thickness and nail size and spacing so as to provide a uniform standard of construction for designers and buildings to follow. This is intended to improve the performance level of buildings and structures that are subject to the higher seismic demands placed on buildings or structure in this region.

This proposed amendment reflects the recommendations by the SEAOSC and the Los Angeles City Joint Task Force, which investigated the performance deficiencies observed in the 1994 Northridge Earthquake. This amendment is a continuation of an amendment adopted during previous code adoption cycles, and is necessary due to the increased risk of significant earthquakes in the County. 2308.6.9 Geological Due to the high geologic activities in the Southern California area and the required higher level of performance of buildings and structures, this amendment limits the use of staple fasteners in resisting or transferring seismic forces. In September 2007, limited cyclic testing data was provided to the ICC, Los Angeles Chapter Structural Code Committee, showing that stapled wood structural shear panels do not exhibit the same behavior as nailed wood structural shear panels. The test results of stapled wood structural shear panels demonstrated much lower strength and drift than nailed wood structural shear panel test results.

Therefore, the use of staples as fasteners to resist or transfer seismic forces shall not be permitted without being substantiated by cyclic testing. This amendment is a continuation of a similar amendment adopted during previous code adoption cycles.
46 11
ATTACHMENT 3
Code Section Condition Explanation of Amendment
3115; Table
3115.8.5.3
Climatic
Geologic
The greater Los Angeles/Long Beach region is situated over a vast array of earthquake fault systems capable of producing major earthquakes, including, but not limited to, the recent 1994 Northridge Earthquake. The region is further impacted by construction of buildings and structures utilizing traditional construction materials that impact the amount of energy, air quality, greenhouse gas emission and construction waste in the area. The proposed amendment addresses structural design requirements specific to intermodal shipping containers, reduce environmental impact of unused and unrecycled intermodal shipping containers, and increase sustainability by reducing consumption of traditional construction materials. The proposed modification needs to be incorporated into the code to assure that new buildings and additions to existing buildings utilizing intermodal shipping containers are designed and constructed in accordance with the scope and objectives of the California Building Code and California Green Building Standards Code.

ELECTRICAL CODE AMENDMENTS
Code Section Condition Explanation of Amendment
220.41 Climatic The County of Los Angeles is a densely populated area with varying and occasionally immoderate temperatures and weather conditions. This creates the need for highly efficient buildings to reduce demand on the electrical grid and, in turn, reduce the use of fossil fuels and improve air quality. The proposed amendment will provide a costeffective means for homeowners to increase energy savings and reduce the demand on the electrical grid by requiring the installation of an energy storage system for current or future use, with minimal need for additional construction and modification of the existing electrical system.

PLUMBING CODE AMENDMENTS
Code Section Condition Explanation of Amendment
Section 304.1 Geological
Topographical
Climatic
The County of Los Angeles is a densely populated area with buildings constructed within a region where water is scarce and domestic water service is impacted by immoderate and varying weather conditions, including periods of extended drought. The proposed measures will require buildings to be more water efficient and allow greater conservation of domestic water due to these local conditions. 47 12
ATTACHMENT 3

PLUMBING CODE AMENDMENTS
Code Section Condition Explanation of Amendment
Sections 601.2.3 Geological
Topographical
Climatic
The County of Los Angeles is a densely populated area with buildings constructed within a region where water is scarce and domestic water service is impacted by immoderate and varying weather conditions, including periods of extended drought. The proposed measures will require buildings to be more water efficient and allow greater conservation of domestic water due to these local conditions.

Section 721.3 Geological
Topographical
To allow for the proper operation of existing Los Angeles County sewer infrastructure and establish consistency with Title 20 – Utilities – of the Los Angeles County Code, Division 2 (Sanitary Sewers and Industrial Waste) due to local soil conditions and topography.

Sections 728.1
to 728.6
Geological
Topographical
To allow for the proper operation of existing Los Angeles County sewer infrastructure and establish consistency with Title 20 – Utilities – of the Los Angeles County Code, Division 2 (Sanitary Sewers and Industrial Waste) due to local soil conditions and topography.

Table H 101.8 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions and to provide protections for native, protected oak trees that are consistent with Title 22 – Zoning and Planning – of the Los Angeles County Code, Chapter 22.174 (Oak Tree Table H 201.1(1) Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions, sewer capacity, and sewage treatment.

Table H 201.1(2) Geological
Topographical
To establish consistency with requirements of the County Health Department for sewer capacity and sewage treatment due to local soil conditions.

Table H 201.1(3) Geological
Topographical
To establish consistency with requirements of the County Health Department for sewer capacity and sewage treatment due to local soil conditions.

Table H 201.1(4) Geological
Topographical
To establish consistency with requirements of the County Health Department for sewer capacity and sewage treatment due to local soil conditions.

Section H 301.1 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions.

Section H 401.3 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions.
48 13
ATTACHMENT 3

PLUMBING CODE AMENDMENTS
Code Section Condition Explanation of Amendment
Section H 601.5 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions.

Section H 601.8 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions.

Section H 701.2 Geological
Topographical
To establish more restrictive requirements for protection of local groundwater due to local soil conditions.

Section H 1001.1 Geological To establish more restrictive requirements to prevent earth movement based on local soil and seismic conditions.

Section H 1101.6 Geological To establish more restrictive requirements to prevent earth movement based on local soil and seismic conditions.

Appendix S Climatic To establish requirements for solar thermal energy systems based on provisions in the Uniform Solar, Hydronics and Geothermal Code (USHGC), which is developed by the International Association of Plumbing and Mechanical Officials. The County of Los Angeles is a densely populated area, with elevated levels of greenhouse gas emissions. Standards to regulate the installation of solar thermal energy systems will facilitate safe and efficient installations of these systems to improve local air quality, thereby improving the health of the County's residents, businesses and visitors.

MECHANICAL CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
501.1 Climatic Additional Health Department requirements are necessary due to local air quality concerns.
510.1.6 Geological High geologic activities, such as seismic events, in the Southern California area necessitate this local amendment for bracing and support.
49 14
ATTACHMENT 3

MECHANICAL CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
603.7.1.1 Geological High geologic activities, such as seismic events, in the Southern California area necessitate this local amendment for bracing and support.
1114.4 Geological High geologic activities, such as seismic events, in the Southern California area necessitate this local amendment to reduce damage and potential for toxic refrigerant release during a seismic event caused by shifting equipment and to minimize impacts to the sewer system in such an event.

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
R301.1.3.2 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. After the 1994 Northridge Earthquake, the Wood Frame Construction Joint Task Force recommended that the quality of woodframe construction needed to be greatly improved. The Task Force recommended that structural plans be prepared by the engineer or architect so that plan examiners, building inspectors, contractors, and special inspectors may logically follow and construct the seismic force-resisting systems as presented in the construction documents. For buildings or structures located in Seismic Design Category D0, D1, D2, or E that are subject to a greater level of seismic forces, the requirement to have a California licensed architect or engineer prepare the construction documents is intended to minimize or reduce structural deficiencies that may cause excessive damage or injuries in woodframe buildings. Involvement of a registered professional will minimize the occurrence of structural deficiencies such as plan and vertical irregularities, improper shear transfer of the seismic forceresisting system, missed details or connections important to the structural system, and the improper application of the prescriptive requirements of the California Residential Code.

R301.1.5 Geological
Topographical
Due to the local topographical and geological conditions of the sites within the greater Los Angeles region and their susceptibility to earthquakes, this technical amendment is required to address and clarify special needs for buildings constructed on hillside locations. A joint Structural Engineers Association of Southern California (SEAOSC) and Los Angeles City Joint Task Force investigated the performance of hillside building failures after the Northridge Earthquake. Numerous hillside failures resulted in loss of life and millions of dollars in damage.

These criteria were developed to minimize the damage to these structures and have been in use by the City and County of Los Angeles for several years.

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
of performance required for buildings and structures, this local amendment limits the type of irregular conditions as specified in the 2022 California Residential Code. Such limitations are recommended to reduce structural damage in the event of an earthquake. The County of Los Angeles and cities in this region have implemented these extra measures to maintain the structural integrity of the framing of the shear walls and all associated elements when designed for high levels of seismic loads.

Requirements from ASCE 7 and the International Building Code would permit equipment weighing up to 400 lbs. when mounted at 4 feet or less above the floor or attic level without engineering design. Where equipment exceeds this requirement, it is the intent of this amendment that a registered design professional be required to analyze if the floor support is adequate and structurally sound.

Table R302.1(2) Climatic This amendment will not allow unprotected openings (openings that do not resist the spread of fire) to be in the exterior wall of a residential building that is located on a property line. This amendment is necessary due to local climatic conditions. The hot, dry weather conditions of late summer in combination with the Santa Ana winds creates an extreme fire danger. Residential buildings with unprotected openings located on a property line may permit fires to spread from the inside of the building to adjacent properties and likewise from exterior properties to the interior of the building.

R337.1.1 Climatic Extends the application of Chapter R337 to include additions, alterations, and/or relocated buildings. Many areas of Los Angeles County have been designated as Fire Hazard Severity Zones due to low humidity, strong winds, and dry vegetation. Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.

R337.1.3 Climatic Extends the application of Chapter R337 to include additions, alterations, and/or relocated buildings. Many areas of Los Angeles County have been designated as Fire Hazard Severity Zones due to the increased risk of fire caused by low humidity, strong winds, and dry vegetation.

Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.

R337.1.3.1 Climatic Extends the application of Chapter R337 to include additions, alterations, and/or relocated buildings. Many areas of Los Angeles County have been designated as Fire Hazard Severity Zones due to the increased risk of fire caused by low humidity, strong winds, and dry vegetation.

Additions, alterations, and/or relocated buildings have the same fire risk as new buildings.
51 16
ATTACHMENT 3

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
R337.3.5.2 Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in Los Angeles County caused by low humidity, strong winds, and dry vegetation in Fire Hazard Severity Zones.

R337.3.5.2.2 Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in Los Angeles County caused by low humidity, strong winds, and dry vegetation in Fire Hazard Severity Zones.

R337.4.4 Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in Los Angeles County caused by low humidity, strong winds, and dry vegetation in Fire Hazard Severity Zones.

R337.5.2 Climatic Disallows the use of wood-shingle/wood-shake roofs and requires the use of Class A roof covering due to the increased risk of fire in Los Angeles County caused by low humidity, strong winds, and dry vegetation in Fire Hazard Severity Zones.

R401.1 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. Wood foundations, even those that are preservative-treated, encounter a higher risk of deterioration when contacting the adjacent ground. The required seismic anchorage and transfer of lateral forces into the foundation system necessary for 2-story structures and foundation walls could become compromised at varying states of wood decay. In addition, global structure overturning moment and sliding resistance is reduced when utilizing wood foundations as opposed to conventional concrete or masonry systems. However, non-occupied, single-story storage structures pose significantly less risk to human safety and may utilize the wood foundation guidelines specified in this Chapter.

R403.1.2
R403.1.3.6
R403.1.5 Figure
R403.1.5
Climatic
Geological
Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. These amendments require minimum reinforcement in continuous footings and stepped footings to address the problem of poor performance of plain or under-reinforced footings during a seismic event. These amendments implement the recommendations of SEAOSC and the Los Angeles City Joint Task Force resulting from their investigation of the 1994 Northridge Earthquake. Interior walls can easily be called upon to resist over half of the seismic loading imposed on simple buildings or structures. Without a continuous foundation to support the braced wall line, seismic loads would be transferred through other elements such as non-structural concrete slab floors, wood floors, etc. Requiring interior braced walls to be supported by continuous foundations is intended to reduce or eliminate the poor performance of buildings or structures.

Wood foundations, when they are not properly treated and protected against deterioration, have performed very poorly and have led to slope failures. Most contractors are typically accustomed to construction in dry weather in the Southern California region and are not generally familiar 52 17
ATTACHMENT 3

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
with the necessary precautions and treatment of wood that makes it suitable for both seismic events and wet applications. With the higher seismic demand placed on buildings and structures in this region, coupled with the dryer weather conditions, it is the intent of this amendment to reduce or eliminate potential problems resulting from the use of wood footings and foundations.

R501.2 Geological Due to the high geologic activities in the Southern California area and the necessary higher level of performance required for buildings and structures, this local amendment limits the potential anchorage and supporting frame failure resulting from additional weight. There is no limitation for weight of mechanical and plumbing fixtures and equipment in the International Residential Code. Requirements from ASCE 7 and the International Building Code would permit equipment weighing up to 400 lbs. when mounted at 4 feet or less above the floor or attic level without engineering design. Where equipment exceeds this requirement, it is the intent of this amendment that a registered design professional be required to analyze if the floor support is adequate and structurally sound.

R503.2.4 Figure
R503.2.4
Geological Section R502.10 of the Code does not provide any prescriptive criteria to limit the maximum floor opening size, nor does Section R503 provide any details to address the issue of shear transfer near larger floor openings. With the higher seismic demand placed on buildings and structures in this region, it is important to ensure that a complete load path is provided to reduce or eliminate potential damage caused by seismic forces. Requiring blocking with metal ties around larger floor openings and limiting opening size is consistent with the requirements of Section R301.2.2.2.5.

Table R602.3(1)
Table R602.3(2)
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. In September 2007, limited cyclic testing data was provided to the ICC Los Angeles Chapter Structural Code Committee showing that stapled wood structural shear panels do not exhibit the same behavior as the nailed wood structural shear panels. The test results of the stapled wood structural shear panels demonstrated lower strength and drift than the nailed wood structural shear panel test results. Therefore, the use of staples as fasteners for shear walls sheathed with other materials shall not be permitted without being substantiated by cyclic testing.

R602.3.2 Table
R602.3.2
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic loads by eliminating single top plate construction.

The performance of modern day braced wall panel construction is directly related to an adequate load path extending from the roof diaphragm to the foundation system.

R602.10.2.3 Geological The greater Los Angeles region is a densely populated area having buildings and structures constructed over and near a vast array of fault 53 18
ATTACHMENT 3

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
systems capable of producing major earthquakes, including, but not limited, to the 1994 Northridge Earthquake. Plywood shear walls with high aspect ratio experienced many failures during the Northridge Earthquake. This proposed amendment specifies a minimum braced wall length to meet an aspect ratio consistent with other sections of the California Residential Code, and to assure that new buildings and additions to existing buildings are designed and constructed in accordance with the scope and objectives of the California Residential Code. This is intended to improve the performance level of buildings and structures that are subject to the higher seismic demands and reduce and limit potential damage to property. This proposed amendment reflects the recommendations by SEAOSC and the Los Angeles City Joint Task Force that investigated the poor performance observed during the 1994 Northridge Earthquake.

Table
R602.10.3(3)
Geological Due to the high geologic activities in the Southern California area and the necessary higher level of performance of buildings and structures, this local amendment reduces or eliminates the allowable shear values for shear walls sheathed with lath, plaster, or gypsum board. The poor performance of such shear walls sheathed with other materials in the 1994 Northridge Earthquake was investigated by SEAOSC and the Los Angeles City Joint Task Force. The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic loads.

In September 2007, cyclic testing data was provided to the Los Angeles Chapter Structural Code Committee showing that stapled wood structural shear panels underperformed nailed wood structural shear panels. Test results of the stapled wood structural shear panels appeared much lower in strength and drift than the nailed wood structural shear panel test results.

The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity with respect to the "maximum shear wall aspect ratios" of the framing of the shear walls when designed for high levels of seismic loads. This amendment is consistent with the shear wall aspect ratio provision of Section 4.3.4 of 54 19
ATTACHMENT 3

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
AWC SDPWS-2015.

Figure
R602.10.6.1
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The poor performance of shear walls in the 1994 Northridge Earthquake was investigated by SEAOSC and the Los Angeles City Joint Task Force. Box nails were observed to cause massive and multiple failures of the typical 3/8" thick 3 ply-plywood during the Northridge Earthquake. The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic loads. The performance of modern day braced wall panel construction is directly related to an adequate load path extending from the roof diaphragm to the foundation system.

Figure
R602.10.6.2
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The poor performance of such shear walls in the 1994 Northridge Earthquake was investigated by SEAOSC and the Los Angeles City Joint Task Force. The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic loads. Box nails were observed to cause massive and multiple failures of typical 3/8-inch thick plywood during the Northridge Earthquake. This change to the minimum lap splice requirement is consistent with Section 12.16.1 of ACI 318-11. This amendment is a continuation of amendments adopted during prior Code adoption cycles.

Figure
R602.10.6.4
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The poor performance of such shear walls in the 1994 Northridge Earthquake was investigated by SEAOSC and the Los Angeles City Joint Task Force. The County of Los Angeles and cities in this region have taken extra measures to maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic loads. The proposal in which "washers shall be a minimum of

0.229 inch by 3 inches by 3 inches in size" is consistent with Section R602.11.1 of the California Residential Code and Section 2308.3.1 of the California Building Code. This amendment is a continuation of amendments adopted during prior Code adoption cycle.

R606.4.4 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. The addition of the word "or" will prevent the use of unreinforced parapets in Seismic Design Category D0, D1, or D2, or on townhouses in Seismic Design Category C.

R606.12.2.2.3 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. Reinforcement using longitudinal wires for buildings and structures located in high seismic areas is not as ductile as deformed rebar. Having vertical reinforcement closer to the ends of masonry walls helps to improve the seismic performance of masonry buildings and structures.

R803.2.4 Geological Section R802 of the Code does not provide any prescriptive criteria to limit the maximum size of roof openings, nor does Section R803 provide 55 20
ATTACHMENT 3

ADMINISTRATIVE & OTHER CODE AMENDMENTS
CODE

SECTION CONDITION EXPLANATION
any details to address the issue of shear transfer near larger roof openings. With the higher seismic demand placed on buildings and structures in this region, it is important to ensure that a complete load path is provided to reduce or eliminate potential damage caused by seismic forces. Requiring blocking with metal ties around larger roof openings and limiting the size of openings is consistent with the requirements of Section R301.2.2.6.

R1001.3.1 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern California area. The performance of fireplaces/chimneys without anchorage to the foundation has been observed to be inadequate during major earthquakes. The lack of anchorage to the foundation results in overturn or displacement.

Appendix AZ
AZ101.1,
AZ102.1,
AZ103.1,
AZ103.4,
AZ107.1
Administrative,
Voluntary
Appendix
Climatic
Geologic
Topographical
Adoption of this appendix is necessary because strict compliance with state and local standards and laws would prevent, hinder, or delay the mitigation of the effects of a declared shelter crisis or other emergency.

The modifications to this appendix are administrative in nature, to provide clarification of various provisions of the language of this voluntary Appendix.

AZ106.1 Climatic,
Voluntary
Appendix
Los Angeles County is subject to extreme temperatures, and many of these membrane structures will be erected and occupied during severe weather events. It is necessary to include this amendment to ensure the safety, health, and comfort of the occupants is maintained during extreme heat and cold.

AZ110.1.1,
AZ110.1.2
Administrative,
Voluntary
Appendix
These sections are simply a cross reference to the State Plumbing Code requirement for user convenience and is not adding a new building standard nor enacting a more restrictive requirement. To the extent findings are requested, see prefatory language in this Section.

AZ110.3 Climatic,
Voluntary
Appendix
The County may utilize mobile restroom facilities that are physically separate from the living facilities. Due to the potential for severe local weather conditions, with extreme temperatures or torrential rain, the distance to the restroom facilities required for the comfort, safety, and health of displaced people should be reduced to 300 feet or as determined by the Building Official.

GREEN BUILDING STANDARDS CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
301.1, 301.1.1 Climatic and
Topographic
Environmental resources in the County of Los Angeles are scarce due to varying, and occasionally immoderate, temperatures and weather conditions. Expanding the scope of the mandatory requirements of this Code for all residential additions and alterations, and for residential buildings of seven stories or greater in height, will achieve a greater reduction in greenhouse gases, higher efficiencies of energy, water, and material usage, and improved environmental air quality. 301.3, 301.3.3 Climatic and Environmental resources in the County of Los Angeles are scarce due to varying, and occasionally immoderate, temperatures and weather 56 21
ATTACHMENT 3

GREEN BUILDING STANDARDS CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
Topographic conditions. Expanding the scope of the mandatory requirements of this Code for nonresidential buildings and residential buildings of seven stories or greater in height that are greater than or equal to 25,000 square feet in floor area will achieve a greater reduction in greenhouse gases, higher efficiencies of energy, water, and material usage, and improved environmental air quality.

4.106.4.1,

4.106.4.1.1,

4.106.4.2,

4.106.4.2.1,

4.106.4.2.2,

4.106.4.2.3
Climatic The County of Los Angeles is a densely populated area with elevated levels of greenhouse gas emissions. The proposed modification to increase the number of EV charging spaces and stations will help to promote the use of electric vehicles and significantly reduce local air and noise pollution and greenhouse gas emissions, thereby improving the health of the County's residents, businesses, and visitors.

4.106.5 Climatic and
Topographic
The County of Los Angeles is a densely populated area having residential buildings constructed within a region where water is scarce and maintaining storm water runoff quality is required. The proposed low-impact development measures will allow greater conservation of rain water, increase in groundwater recharge, reduction of storm water runoff, and improvement in storm water runoff quality.

4.106.6,

4.106.6.1,

4.106.6.2,

4.106.6.3, Table

4.106.6(1) Table

4.106.6(2)
Climatic Environmental resources in the County of Los Angeles are scarce due to varying, and occasionally immoderate, temperatures and weather conditions. Adding mandatory requirements for cool roofs for residential occupancies will achieve a greater reduction in greenhouse gases, higher efficiencies of energy, and improved environmental air quality.

5.106.3 Climatic and
Topographic
The County of Los Angeles is a densely populated area having buildings constructed within a region where water is scarce and maintaining storm water runoff quality is required. The proposed low-impact development measures will allow greater conservation of rain water, increase in groundwater recharge, reduction of storm water runoff, and improvement in storm water runoff quality.

Table

5.106.5.3.1
Climatic The County of Los Angeles is a densely populated area with elevated levels of greenhouse gas emissions. The proposed modification to increase the number of EV charging spaces and stations will help to promote the use of electric vehicles and significantly reduce local air and noise pollution and greenhouse gas emissions, thereby improving the health of the County's residents, businesses, and visitors.

5.106.11,

5.106.11.1,

5.106.11.2,

5.106.11.3,
Table 5.106.11
Climatic Environmental resources in the County of Los Angeles are scarce due to varying, and occasionally immoderate, temperatures and weather conditions. Adding mandatory requirements for cool roofs for nonresidential occupancies will achieve a greater reduction in greenhouse gases, higher efficiencies of energy, and improved environmental air quality.

A5.601.1 Climatic and
Topographic
Environmental resources in the County of Los Angeles are scarce due to varying, and occasionally immoderate, temperatures and weather conditions. Expanding the scope of the mandatory requirements of this Code for nonresidential buildings and residential buildings of seven 57 22
ATTACHMENT 3

GREEN BUILDING STANDARDS CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
stories or greater in height that are greater than or equal to 25,000 square feet in floor area will achieve a greater reduction in greenhouse gases, higher efficiencies of energy, water, and material usage, and improved environmental air quality.

EXISTING BUILDING CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
302.6.1 to 302.6.3 Geologic The greater Los Angeles/Long Beach region is a densely populated area having buildings constructed over and near a vast array of fault systems capable of producing major
earthquakes, including, but not limited to, the 1994 Northridge Earthquake. The purpose of the amendments is to prevent inadequate construction or bracing to increase resistance to horizontal forces, thus minimizing hazards to life or property in the event of an earthquake.
302.7 Geologic The greater Los Angeles/Long Beach region is a densely populated area having buildings constructed over and near a vast array of fault systems capable of producing major
earthquakes, including, but not limited to, the 1994 Northridge Earthquake. The purpose of the amendment is to minimize injuries caused by shattering glass in the event of an
earthquake.

A401.2 Geologic,
Administrative,
Voluntary
Appendix
The greater Los Angeles/Long Beach region is situated over a vast array of earthquake fault systems capable of producing major earthquakes, including, but not limited to, the 1994 Northridge Earthquake. The purpose of this amendment is to provide voluntary building standards to constituents that are performing seismic retrofitting for existing structures.

A404.1 Administrative,
Geologic,
Voluntary
Appendix
The greater Los Angeles/Long Beach region is situated over a vast array of earthquake fault systems capable of producing major earthquakes, including, but not limited to, the 1994 Northridge Earthquake. The purpose of this amendment is to provide voluntary building standards to constituents that are performing seismic retrofitting for existing structures. Due to these factors, the County requires a licensed architect or engineer stamp and approval of the construction documents. 58 Attachment 4

NOTICE OF PUBLIC HEARING

CITY OF MALIBU

CITY COUNCIL
The Malibu City Council will hold a public hearing on Monday, December 8, 2025 at 5:30 p.m. on the item identified below in the Council Chambers at Malibu City Hall, located at 23825 Stuart Ranch Road, Malibu, CA.

Public comment can be submitted ahead of the public hearing to [email protected] for inclusion in the public record. To participate during the public hearing, please review the meeting agenda posted at MalibuCity.org/AgendaCenter and follow the directions for public participation.

CALIFORNIA BUILDING STANDARDS CODE: ORDINANCE 531U
AN URGENCY ORDINANCE OF THE CITY OF MALIBU ADOPTING BY REFERENCE TITLE 26

OF THE LOS ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA BUILDING CODE, 2025 EDITION; TITLE 27 OF THE LOS ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA ELECTRICAL CODE, 2025 EDITION; TITLE 28 OF THE LOS ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA PLUMBING CODE, 2025 EDITION; TITLE 29 OF THE LOS ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA MECHANICAL CODE, 2025 EDITION; TITLE 30 OF THE LOS ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA RESIDENTIAL CODE, 2025 EDITION; TITLE 31 OF THE LOS ANGELES

COUNTY CODE, INCORPORATING THE CALIFORNIA GREEN BUILDING STANDARDS CODE, 2025 EDITION; THE CALIFORNIA ENERGY CODE, 2025 EDITION; TITLE 33 OF THE LOS

ANGELES COUNTY CODE, INCORPORATING THE CALIFORNIA EXISTING BUILDING CODE, 2025 EDITION; THE CALIFORNIA FIRE CODE, 2025 EDITION; THE CALIFORNIA REFERENCES STANDARDS CODE, 2025 EDITION; THE CALIFORNIA ADMINISTRATIVE CODE, 2025 EDITION, THE CALIFORNIA HISTORICAL BUILDING CODE, 2025 EDITION, MAKING AMENDMENTS TO SAID CODES; DECLARING THE URGENCY THEREOF; REPEALING ORDINANCE NO. 503; AND FINDING THE ACTION EXEMPT FROM THE CALIFORNIA

ENVIRONMENTAL QUALITY ACT

COPIES OF THE CODE ARE ON FILE WITH THE CITY CLERK AND OPEN TO PUBLIC INSPECTION.

IF YOU CHALLENGE THE CITY COUNCIL’S ACTION IN COURT, YOU MAY BE LIMITED TO

RAISING ONLY THOSE ISSUES RAISED AT THE PUBLIC HEARING DESCRIBED IN THIS

NOTICE, OR OTHERWISE HELD BY THE CITY, OR IN WRITTEN CORRESPONDENCE DELIVERED TO THE CITY, EITHER AT OR PRIOR TO THE PUBLIC HEARING.

If there are any questions regarding this notice, please contact Yolanda Bundy, Community Development Director/Building Official, at (310) 456-2489, ext. 229. Copies of all related documents can be reviewed by any interested person at City Hall during regular business hours. Oral and written comments may be presented to the City Council on or before the date of the meeting. ________________________________________________________ Yolanda Bundy, Community Development Director/Building Official Publish Dates: November 20, 2025, November 27, 2025 and December 4, 2025 59 COUNTY OF LOS ANGELES

DEPARTMENT OF PUBLIC WORKS
“To Enrich Lives Through Effective and Caring Service”
900 SOUTH FREMONT AVENUE
ALHAMBRA, CALIFORNIA 91803-1331
Telephone: (626) 458-5100
http://dpw.lacounty.gov
November 4, 2025
MARK PESTRELLA, Director
ADDRESS ALL CORRESPONDENCE TO:

P.O. BOX 1460
ALHAMBRA, CALIFORNIA 91802-1460

IN REPLY PLEASE
REFER TO FILE:

The Honorable Board of Supervisors
County of Los Angeles
383 Kenneth Hahn Hall of Administration
500 West Temple Street
Los Angeles, California 90012
Dear Supervisors:

MUNICIPAL SERVICES CORE SERVICE AREA
PROPOSED ORDINANCES - 2026 LOS ANGELES COUNTY

BUILDING, ELECTRICAL, PLUMBING, MECHANICAL, RESIDENTIAL,

GREEN BUILDING STANDARDS, AND EXISTING BUILDING CODES
(ALL SUPERVISORIAL DISTRICTS)
(3-VOTES)

SUBJECT
Public Works is seeking Board approval of proposed ordinances to amend the Los Angeles County Code and adopt the California Building Standards Codes, with amendments, as required by State law, for the enforcement of: Title 26 - Building Code; Title 27 - Electrical Code; Title 28 - Plumbing Code; Title 29 - Mechanical Code; Title 30 - Residential Code; Title 31 - Green Building Standards Code; and Title 33 - Existing Building Code.

IT IS RECOMMENDED THAT THE BOARD:

1. Find that the proposed ordinances are exempt from the provisions of the California Environmental Quality Act for the reasons stated in this letter Board letter and in the record of the project.

2. Introduce, waive reading, and place the ordinances amending the Los Angeles County Codes on the November 25, 2025, public hearing agenda to adopt by reference the 2025 California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes. 40 November 4, 2025
SET: November 25, 2025 at 9:30 a.m.

Attachment 1
60 The Honorable Board of Supervisors
November 4, 2025

Page 2 ends

AFTER THE PUBLIC HEARING, IT IS RECOMMENDED THAT THE BOARD:

3. Find that the proposed changes and modifications to building standards contained in the Los Angeles County Codes by reference to the 2025 California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes are reasonably necessary due to local climatic, geological, and/or topographical conditions, as detailed in the seven respective ordinances; find that the proposed changes and modifications are substantially equivalent to changes and modifications that were previously filed with the California Building Standards Commission, which were in effect as of September 30, 2025, or that the changes and modifications relate to home hardening, as detailed in the ordinances, in compliance with the California Health and Safety Code; and find that adoption of the emergency housing appendices in Titles 26 and 30 are necessary because strict compliance with State and local standards and laws would prevent, hinder, or delay the mitigation of the effects of a declared shelter crisis or other emergency.

4. Approve the ordinances and establish their effective date as January 1, 2026.

5. Instruct the Director of Public Works or his designee to file the adopted ordinances containing the Board of Supervisors' findings with the California Building Standards Commission, along with other State agencies as required by law.

PURPOSE/JUSTIFICATION OF RECOMMENDED ACTION
The purpose of the recommended actions is to find that the proposed ordinances are exempt from the provisions of the California Environmental Quality Act (CEQA) and to adopt the enclosed ordinances, as required by State law, to add, update, and set forth provisions and regulations for the enforcement of the Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes within the unincorporated areas of the County of Los Angeles and the contract cities served by the County that elect to adopt the same ordinances by reference.

Implementation of Strategic Plan Goals
These recommendations support the County Strategic Plan: North Star 2, Foster Vibrant and Resilient Communities, Focus Area Goal D, Sustainability, by providing services to the public that have a wide-reaching positive effect on the entire community.

The adoption of the County's building codes provides minimum construction and property maintenance standards that promote carbon-neutrality and climate resilience in structures, as well as the health and welfare of the general public throughout the 61 The Honorable Board of Supervisors
November 4, 2025

Page 3 ends

unincorporated areas of the County. By incorporating the most up-to-date building and safety standards, the County will be able to ensure that its Strategic Goals are fully addressed.

FISCAL IMPACT/FINANCING
There will be minimal impact on expenditures for Public Works to train appropriate personnel. All associated costs, including training costs and the procurement of the new code books, are included in the Public Works General Fund (A01, Services and Supplies) Fiscal Year 2025-26 Budget.

FACTS AND PROVISIONS/LEGAL REQUIREMENTS
The State recently adopted the 2025 Edition of the California Building Standards Code, which includes the 2025 California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes.

The California Health and Safety Code requires that the County adopt ordinances that impose the same building standards as contained in the 2025 California Building Standards Code, with the exception that the County may make amendments to these building standards that are more restrictive and are reasonably necessary due to local climatic, geological, and/or topographical conditions. The proposed changes in the ordinances are consistent with Assembly Bill 130, enacted on June 30, 2025, which prohibits most local modifications to the California Building Standards Codes for residential units. The proposed modifications to the California Building Standards Codes in these ordinances are consistent with Assembly Bill 130 because the proposed changes are substantially equivalent to the County's Building Codes that were in effect on September 30, 2025, or relate to home hardening.

The enclosed ordinances incorporate, by reference, the building standards contained in the 2025 California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes, together with critical and necessary County amendments. In accordance with Sections 17958.5 and 17958.7 of the California Health and Safety Code, the Board must determine and expressly find that these proposed amendments are needed due to local climatic, geological, and/or topographical conditions.

Section 8698.4 of the California Government Code permits local jurisdictions, upon declaration of a shelter crisis, to suspend health and safety standards for homeless shelters, provided those local jurisdictions have adopted reasonable local standards that at a minimum meet the standards provided in the emergency housing appendices of Title 30 - Residential Code (Appendix CJ) and Title 26 - Building Code (Appendix Q).

In addition, at the time of the ordinance adoption, the local jurisdiction must determine 62 The Honorable Board of Supervisors
November 4, 2025

Page 4 ends

that strict compliance with existing State and local standards or laws would in any way prevent, hinder, or delay the mitigation of the effects of the shelter crisis.

The applicable finding(s) for each proposed amendment to the California Building Standards Code are clearly delineated in a chart, which is set forth in each of the proposed ordinances. The ordinances also contain various administrative changes that do not require special local findings. The last County update to the California Building Standards Code was approved by the Board on November 15, 2022.

In its continued efforts to provide consistency within the Los Angeles Basin and to provide the public with locally applicable and efficient codes, Public Works has, again, joined efforts with a majority of the cities within the County to undergo thorough examination of previous and proposed amendments to the building standards published by the State. Many of the proposed local amendments to the California Building Standards Code are based on the model language generated by the International Code Council Los Angeles Basin Chapter which has the support of many local jurisdictions. These local jurisdiction amendments are structured to be consistent with the 2025 Edition of the California Building Standards Code provisions. The goal of these multijurisdictional groups is to minimize differences in code language and interpretation within the region, thereby assisting the local construction industry by unifying and streamlining the permitting process.

California Health and Safety Code Sections 17958 and 18941.5 require that all amendments, together with the unamended portions of the California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes, become effective 180 days after the publication of the California Building Standards Code. The State has established the effective date to be January 1, 2026.

Accordingly, it is recommended that the Board establish the operative date of the amendments, together with the unamended portions of the California Building Standards Code, to be January 1, 2026. The proposed amendments will then become operative when the Board's findings are filed with the California Building Standards Commission.

In accordance with the requirements of California Government Code Section 50022.3, the Board must schedule a public hearing after the first reading of the title of the adopting ordinances. Notice of the hearing is required to be published pursuant to California Government Code Section 6066. A copy of the California Building, Electrical, Plumbing, Mechanical, Residential, Green Building Standards, and Existing Building Codes are on file with the Executive Office of the Board and are available for public inspection and also available at the following website link: https://www.dgs.ca.gov/BSC/Codes.

A sample notice is submitted herewith.
63 The Honorable Board of Supervisors
November 4, 2025

Page 5 ends

ENVIRONMENTAL DOCUMENTATION
Adoption of these ordinances is exempt from CEQA in that it can be seen with certainty that there is no possibility that the ordinances may have a significant effect on the environment pursuant to CEQA Guidelines Section 15061(b)(3). Adoption of the proposed ordinances is covered by the general rule that CEQA applies only to projects that have the potential to cause a significant effect on the environment. Adoption of the proposed ordinances does not have such potential.

IMPACT ON CURRENT SERVICES (OR PROJECTS)
Other departments embarking on construction projects will be required to comply with the provisions of these ordinances if applications for permits to begin construction are submitted on or after the operative date of these ordinances.

Copies of the proposed code changes were circulated to professional associations within the design and construction communities for review and comments. No comments were received by Public Works, and changes to the proposed code changes were not necessary.

CONCLUSION
Upon approval of the enclosed ordinances, please return one adopted copy of this Board letter and one adopted copy of the ordinances to Public Works, Building and Safety Division.

Respectfully submitted,

MARK PESTRELLA, PE
Director of Public Works
MP:JM:el
Enclosures
c: Chief Executive Office (Christine Frias)
County Counsel
Executive Office, Board of Supervisors
Fire
Regional Planning
64 HOA.105556295.10

ANALYSIS
This ordinance repeals those provisions of Title 26 – Building Code – of the Los Angeles County Code that incorporated by reference portions of the 2022 Edition of the California Building Code, and the ordinance replaces them with provisions incorporating by reference portions of the 2025 California Building Code, as published by the California Building Standards Commission, with certain changes and modifications.

State law requires that the County's Building Code contain the same requirements as are contained in the building standards published in the most recent edition of the California Building Code. State law allows the County to change or modify these requirements in compliance with section 17958 of the California Health and Safety Code, based upon express findings, contained in the ordinance, that such changes are reasonably necessary due to local climatic, geological, or topographical conditions. These changes and modifications are substantially equivalent to changes or modifications previously filed with the California Building Standards Commission by the County of Los Angeles, which were in effect as of September 30, 2025, or that relate to home hardening, in compliance with recent changes to section 17958 of the California Health and Safety Code.

This ordinance also makes certain modifications to the administrative provisions of Title 26.

DAWYN R. HARRISON
County Counsel
By
MARGARET F. AMBROSE
Principal Deputy County Counsel
MFA/CBS:bc
Requested: 08/20/25
Revised: 10/22/25
Enclosure A
65 HOA.105556295.10
ORDINANCE NO. __________
An ordinance amending Title 26 – Building Code – of the Los Angeles County Code, to adopt and incorporate by reference the 2025 California Building Code, with certain changes and modifications, and to make other revisions thereto.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Sections 119.1.2 through 119.1.14 of Chapter 1, Chapters 2 through 35, and Appendices C, H, I, J, and P, of the Los Angeles County Code, which incorporate by reference and modify portions of the 2022 California Building Code, are hereby repealed notwithstanding the Governor of the State of California's Executive Order N-29-25.

SECTION 2. Section 100 is hereby amended to read as follows:
100 ADOPTION AND INCORPORATION BY REFERENCE
Except as hereinafter changed or modified, Sections 1.2 through 1.14 of Chapter 1 of Division I of that certain building code known and designated as the 20222025 California Building Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 26 of the Los Angeles County Code as if fully set forth below, and shall be known as Sections 119.1.2 through 119.1.14, respectively, of Chapter 1 of Title 26 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 35, and Appendices C, H, I, J, and P, and Q, of that certain building code known and designated as the 20222025 California Building Code, as published by the California Building Enclosure A
66 HOA.105556295.10 2
Standards Commission, are adopted and incorporated by reference into this Title 26 of the Los Angeles County Code as if fully set forth below, and shall be known as Chapters 2 through 35, and Appendices C, H, I, J, and P, and Q, of Title 26 of the Los Angeles County Code.

Projects to repair, restore, demolish, or replace residential structures or facilities substantially damaged or destroyed as a result of the 2025 Eaton and Palisades wildfires may comply with the 2022 Building Standards Code, as adopted by Los Angeles County, provided that the plans and specifications for the project comply with the 2025 fire and public safety requirements and minimum elevation requirements for the National Flood Insurance Program, consistent with the Governor's Executive Order N-29-25, or subsequent applicable legal authorities.

A copy of said California Building Code, hereinafter referred to as the CBC, including the above-designated appendices, shall be at all times maintained by the Building Official for use and examination by the public. . . .

SECTION 3. Section 103 is hereby amended to read as follows:

SECTION 103 VIOLATIONS AND PENALTIES
103.1 Compliance with Code.

It shall be unlawful for a person to erect, construct, enlarge, alter, extend, repair, move, improve, remove, connect, convert, demolish, equip, or perform any other work on any building or structure or portion thereof, or perform any grading within a property subject to this Code as defined in Section 101.3, or cause the same to be done, Enclosure A
67 HOA.105556295.10 3
contrary to, or in violation of, any of the provisions of this Code.

SECTION 4. Section 104 is hereby amended to read as follows:

SECTION 104 ORGANIZATION AND ENFORCEMENT
. . .
104.2.1 General.

The Building Official is hereby authorized and directed to enforce all the provisions of this Code, including the Electrical Code, the Plumbing Code, the Mechanical Code, the Residential Code, the Existing Building Code, and the Green Building Standards Code, and any other codes as indicated in this Code, and to make all inspections pursuant to the provisions of each such Code. For such purposes, the Building Official shall have the powers of a law enforcement officer. . . .
104.2.8 Alternate Materials, Designs and Methods of
Construction.
. . .
104.2.8.1 Reports.

Supporting data, where necessary to assist in the approval of any material, appliance, installation, device, arrangement, design, or method of construction not specifically provided for in this Code, shall comply with Sections 104.2.8.1.1 and 104.2.8.1.2.

Enclosure A
68 HOA.105556295.10 4
104.2.8.1.1 Evaluation reports.

Evaluation reports shall be issued by an approved agency as defined in Chapter 2, and use of the evaluation report shall require approval by the Building Official for the installation. The alternate material, appliance, installation, device, arrangement, design or method of construction shall be within the scope of the Building Official's recognition of the approved agency's expertise. Criteria used for the evaluation shall be identified within the report and, where required, provided to the Building Official. 104.2.8.1.2 Other reports.

Reports not complying with Section 104.2.8.1 shall describe criteria, including, but not limited to, any referenced testing or analysis, used to determine compliance with code intent and justify code equivalence. The report shall be prepared by a qualified engineer, specialist, laboratory or specialty organization acceptable to the Building Official. The Building Official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.
104.2.8.2 Peer review.

In addition to the evaluation report, the Building Official is authorized to require submittal of a peer review report in conjunction with a request to use an alternative material, appliance, installation, device, arrangement, design or method of construction, prepared by a qualified peer reviewer that is approved by the Building Official.

Enclosure A
69 HOA.105556295.10 5
SECTION 5. Section 106 is hereby amended to read as follows:

SECTION 106 PERMITS
. . .
106.3 Work Exempted.
. . .

Exemption from the permit requirements of this Code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this Code, other laws, ordinances, or regulations, or required approvals from other County Departments and State and federal agencies. Structures shall still be regulated by Chapter 5 of the California Wildland Urban Interface Code, despite exemption from permits.
. . .
106.5.7 Combined swimming pool permit.

A combined swimming pool permit, which includes all building, electrical, plumbing, heating, and excavation work, may be issued for a newconstruction, addition, alteration, or repair work of a swimming pool, spa or hot tub. which will include all building, electrical, plumbing, heating, and excavation work. The combined swimming pool permit shall be subject to the requirements of this Code, the Residential Code, the Existing Building Code, the Green Building Standards Code, the Electrical Code, the Plumbing Code and the Mechanical Code, except that the fee for the combined swimming pool permit shall be as provided in Section 107.1 of this Code.

Enclosure A
70 HOA.105556295.10 6
SECTION 6. Table 1-A is hereby amended to read as follows:

TABLE 1-A
BUILDING PERMIT FEES*
1,2,3

TOTAL VALUATION FEE
$0 to and including $700 $63.21
More than $700 to and including $25,000 $94.87
plus for each additional $1,000 or fraction thereof in excess of $1,000
$24.44
$25,001 to and including $50,000 $682.83
plus for each additional $1,000 or fraction thereof in excess of $25,000
$18.77
$50,001 to and including $100,000 $1,159.71
plus for each additional $1,000 or fraction thereof in excess of $50,000
$14.22
More than $100,000 $1,867.20
plus for each additional $1,000 or fraction thereof $9.66 * For additional permit issuance fee, see Section 107.1. 1 The building permit fee specified in the table above shall be increased by a surcharge of 0.013 percent of the total valuation of a Group R Occupancy or by 0.028 percent of the total valuation of all other occupancies or $0.50, whichever amount is higher, pursuant to Section 2705, Chapter 8, Division 2 of the Public Resources Code of the State of California (State Strong-Motion Instrumentation Program). This surcharge shall not be included in the building permit fee for the purpose of determining the plan check fee. 2 The permit fee specified in the table above shall be increased by 10 percent for all construction work required to comply with the rules and regulations adopted by the Energy Resources Conservation and Development Commission of the State of CaliforniaCalifornia Energy Commission. This increase in fee shall be included in the building permit fee for the purpose of determining the plan checking fee.

Enclosure A
71 HOA.105556295.10 7
3 The permit fee specified in the table above shall be increased by 5 percent for all construction work required to comply with Title 24, California Code of Regulations, Section 101, et seq., the State's disabled access and adaptability requirements. The increase in fee shall be included in the building permit fee for the purpose of determining the plan check fee.
107.14 Noncompliance Fee.
. . .
107.14.1.

In accordance with Health and Safety Code 17973, where noncompliance occurs in a project related to exterior elevated elements, the Building Official may assess a civil penalty of not less than $100 nor more than $500 per day until the repairs are completed, unless an extension of time is granted by the Building Official.

SECTION 7. Section 108 is hereby amended to read as follows:

SECTION 108 INSPECTIONS
. . .
108.4 Required Inspections.
. . .
108.4.8 Types IV-A, IV-B and IV-C connection protection inspection.

In buildings of Types IV-A, IV-B and IV-C construction, where connection fireresistance ratings are provided by wood cover calculated to meet the requirements of Section 2304.10.1, the Building Official shall inspect the wood cover after the cover is installed, but before any other coverings or finishes are installed.

Enclosure A
72 HOA.105556295.10 8
108.4.9 Weather-exposed balcony and walking surface
waterproofing.

Where balconies or other elevated walking surfaces have weather-exposed surfaces, and the structural framing is protected by an impervious moisture barrier, all elements of the impervious moisture barrier system shall not be concealed until inspected and approved by the Building Official.

Exception: Where special inspections are provided in accordance with Section 1705.1.1, Item 3.
108.4.810 Final inspection.
. . .
108.9 Approval required.

Work shall not be done beyond the point indicated in each successive inspection without first obtaining the approval of the Building Official. The Building Official, upon notification, shall make the requested inspections and shall either indicate the portion of the construction that is satisfactory and approved, or notify the permit holder or the permit holder's agent wherein the same fails to comply with this Code. Any portions that do not comply shall be corrected and such portion shall not be covered or concealed until authorized by the Building Official.
108.910 Reinspections.
. . .

Enclosure A
73 HOA.105556295.10 9
SECTION 8. Section 109 is hereby amended to read as follows:

SECTION 109 USE AND OCCUPANCY
109.3 Certificate Issued.
. . .

7. The edition of this Code under which the permit was issued.

8. The type of construction as defined in Chapter 6.

9. The design occupant load.

10. Where an automatic sprinkler system is provided, whether the sprinkler system is required.

11. Any special stipulations and conditions of the building permit.

SECTION 9. Section 113 is hereby amended to read as follows:

SECTION 113 EARTHQUAKE FAULTS
113.5 Construction Limitations.
. . .

The Building Official may waive the requirements for an active earthquake fault investigation for additions to existing one- or two-family dwelling units when all of the following conditions are met:

1. There is no increase in the number of bedrooms or bedroom equivalent rooms in the dwelling unit;

2. The addition does not increase the permitted gross floor area of the structure by more than 20 percent as it existed on January 1, 2017, or 400 square feet, whichever is less;
Enclosure A
74 HOA.105556295.10 10

3. The Building Official has determined that the addition is not located over or upon the trace of a known active earthquake fault as shown on the aforementioned maps; and

4. The owner shall record in the office of the Department of Registrar-Recorder a statement acknowledging that the owner is aware that the records of the Building Official indicate that the property is potentially subject to a hazard from a known active earthquake fault. The owner shall also record in the office of the Department of Registrar-Recorder an agreement relieving the County and all officers and employees thereof of any liability for any damage or loss which may result from the issuance of such a permit. This agreement shall provide that it is binding on all successors in interest of the owner and shall continue in effect until the Building Official records in the office of the Department of Registrar-Recorder a statement that the Building Official has determined that a hazard from a known active earthquake fault no longer exists. . . .
113.5.1 Additions to One- or Two-Family Dwellings.

The Building Official may waive the requirements for an active earthquake fault investigation for additions to existing one- or two-family dwelling units when all of the following conditions are met:

1. There is no increase in the number of bedrooms or bedroom equivalent rooms in the dwelling unit;
Enclosure A
75 HOA.105556295.10 11

2. The addition does not increase the permitted gross floor area of the structure by more than 20 percent as it existed on January 1, 2017, or 400 square feet, whichever is less;

3. The Building Official has determined that the addition is not located over or upon the trace of a known active earthquake fault as shown on the aforementioned maps; and

4. The owner shall record in the office of the Department of RegistrarRecorder a statement acknowledging that the owner is aware that the records of the Building Official indicate that the property is potentially subject to a hazard from a known active earthquake fault. The owner shall also record in the office of the Department of Registrar-Recorder an agreement relieving the County and all officers and employees thereof of any liability for any damage or loss that may result from the issuance of such a permit. This agreement shall provide that it is binding on all successors in interest of the owner and shall continue in effect until the Building Official records in the office of the Department of Registrar-Recorder a statement that the Building Official has determined that a hazard from a known active earthquake fault no longer exists. 113.5.2 Repair of single-family dwellings, their accessory dwelling units, or accessory structures destroyed by the wildfires.

The Building Official may waive the requirements for an active earthquake fault investigation for the repair of a single-family dwelling, its accessory dwelling units, or accessory structures that were damaged or destroyed by wildfires as expressly Enclosure A
76 HOA.105556295.10 12
designated by the Los Angeles County Board of Supervisors through a proclaimed local emergency motion or resolution, when all of the following conditions are met:

1. The structure is a wood-frame or steel-frame structure not exceeding two stories and a basement.

2. The structure is not part of a development of four or more dwellings.

3. The permit applicant is the owner of the property at the time of the loss, the owner's immediate heir(s), or their authorized representative.

4. The application for a permit is filed no later than ten (10) years following the date of the loss.

5. The repaired structure does not exceed the area of the previously existing, permitted structure, plus 10 percent.

6. The owner shall record in the office of the Department of RegistrarRecorder a statement acknowledging that the owner is aware that the records of the Building Official indicate that the property is potentially subject to a hazard from a known active earthquake fault. The owner shall also record in the office of the Department of Registrar-Recorder an agreement relieving the County and all officers and employees thereof of any liability for any damage or loss that may result from the issuance of such a permit. This agreement shall provide that it is binding on all successors in interest of the owner and shall continue in effect until the Building Official records in the office of the Department of Registrar-Recorder a statement that the Building Official has determined that a hazard from a known active earthquake fault no longer exists.

Enclosure A
77 HOA.105556295.10 13

7. In this section, repair shall be defined as the reconstruction, replacement, or renewal of any part or the whole of an existing building for the purpose of either maintenance related to the fire or to correct damage caused by the fire. 113.5.2.1. In addition to the work allowed under 113.5.2, the Building Official may permit the construction of a new accessory dwelling unit on a property where a single-family dwelling was destroyed by wildfires as part of a project permitted under 113.5.2.
113.5.2.2. The provisions of this Section may also apply to other disasters as expressly designated by the Los Angeles County Board of Supervisors through a proclaimed local emergency motion or resolution.

SECTION 10. Section 114 is hereby added to read as follows:

SECTION 114 SERVICE UTILITIES
114.1. Connection of service utilities.

A person shall not make connections from a utility, a source of energy, fuel, or power, or a water system or sewer system to any building or system that is regulated by this Code for which a permit is required, until approved by the Building Official. 114.2. Temporary connection.

The Building Official shall have the authority to allow the temporary connection of a building or system to a utility, a source of energy, fuel, or power, or a water or sewer system for the purpose of testing systems or for use under a temporary approval. The Building Official shall approve the duration of the temporary timeframe.

Enclosure A
78 HOA.105556295.10 14
114.3. Authority to disconnect service utilities.

The Building Official shall have the authority to disconnect utility services to a building, structure or system regulated by this Code in case of emergency where necessary to eliminate an immediate hazard to life or property or where such utility connection has been made without the approval required by Section 114.1 or 114.2. The Building Official shall notify the serving utility, and wherever possible the owner or the owner’s authorized agent and occupant of the building, structure or service system of the decision to disconnect prior to taking such action. If not notified prior to disconnecting, the owner or the owner's authorized agent or occupant of the building, structure or service system shall be notified in writing, as soon as practical thereafter.

Sections 115 through 118 are hereby reserved.

SECTION 11. Section 701A is hereby added to read as follows:
701A. MODIFICATIONS TO THE CALIFORNIA WILDLANDURBAN INTERFACE CODE.

Chapter 5 of the California Wildland-Urban Interface Code shall be modified as indicated in Sections 701A.1 through 701A.7 and shall apply to all buildings and structures as provided in this section.

SECTION 12. Section 701A.1 is hereby added to read as follows:
701A.1 California Wildland-Urban Interface Code, Section 501.1.

Modify the California Wildland-Urban Interface Code Section 501.1 to read as follows:

Enclosure A
79 HOA.105556295.10 15
501.1 Scope and Application.

New bBuildings and structures in a wildland-urban interface area shall be constructed in accordance with the California Building Code and this Code. Additions, alterations, or repairs made to existing buildings erected, constructed, or moved within a Fire Hazard Severity Zone or Wildland-Urban Interface area shall be constructed in accordance with the Building Code and this Code. New buildings for which an application for a building permit is submitted on or after July 1, 2008, and any additions, alterations, or repairs made to existing buildings for which an application for a building permit is submitted on or after January 1, 2026, located in any Fire Hazard Severity Zone or Wildland-Urban Interface area shall comply with all sections of the Building Code and this Code.

Exceptions:

1. Group U accessory structures not exceeding 120 square feet (11m2) in floor area where located not less than 50 feet (15 240 mm) from applicable buildings.

2. Group U agricultural buildings not less than 50 feet (15 240 mm) from applicable buildings.
501.1.1 Alternates for materials, design, tests, and methods of construction.

The Building Official is permitted to modify the provisions of this Chapter for sitespecific conditions in accordance with Chapter 1, Section 104.2.2.

Enclosure A
80 HOA.105556295.10 16
SECTION 13. Section 701A.2 is hereby added to read as follows:
701A.2 California Wildland-Urban Interface Code, Section 503.1 Modify the California Wildland-Urban Interface Code Section 503.1 to read as follows:
503.1 General.

Buildings and structures hereafter constructed, modified or relocated into or within wildland-urban interface areas shall meet the construction requirements in accordance with Chapter 5. Materials required to be ignition-resistant building materials shall comply with the requirements of Section 503.2.

Exceptions:

1. New accessory buildings and miscellaneous structures complying with Section 504.11.

2. Additions to and remodels of buildings originally constructed prior to July 1, 2008.Reserved.

3. Group C occupancy special buildings conforming to the limitations specified in Section 450.4.1 of the California Building Code.

SECTION 14. Section 701A.3 is hereby added to read as follows:
701A.3 California Wildland-Urban Interface Code,
Section 503.2.3.

Modify the California Wildland-Urban Interface Code Section 503.2.3 to read as follows:

Enclosure A
81 HOA.105556295.10 17
503.2.3 Fire-retardant-treated wood roof coverings.

Roof assemblies containing fire-retardant-treated wood shingles and shakes shall comply with the requirements of Section 1505.6 of the California Building Code and shall be classified as Class A roof assemblies as required in Section 1505.2 of the California Building Code.Reserved.

SECTION 15. Section 701A.4 is hereby added to read as follows:
701A.4 California Wildland-Urban Interface Code,
Section 503.3.1.

Modify the California Wildland-Urban Interface Code Section 503.3.1 to read as follows:
503.3.1 Qualification by testing.

Material and material assemblies tested in accordance with the requirements of Section 503 shall be accepted for use when the results and conditions of those tests are met. Product evaluation testing of material and material assemblies shall be approved or listed by the State Fire Marshal, the Building Official, or identified in a current report issued by an approved agency.

SECTION 16. Section 701A.5 is hereby added to read as follows:
701A.5 California Wildland-Urban Interface Code,
Section 503.3.4.

Modify the California Wildland-Urban Interface Code Section 503.3.4 to read as follows:

Enclosure A
82 HOA.105556295.10 18
503.3.4 Fire-retardant-treated wood shingles and
shakes.Reserved.

Fire-retardant-treated wood shingles and shakes shall be approved and listed by the State Fire Marshal in accordance with Section 208(c), Title 19 California Code of Regulations.

SECTION 17. Section 701A.6 is hereby added to read as follows:
701A.6 California Wildland-Urban Interface Code,
Section 504.2.1.

Modify the California Wildland-Urban Interface Code Section 504.2.1 to read as follows:
504.2.1 Roof covering voids.

Where there is a void under the roof covering it shall comply with Section 504.2.1.1 or 504.2.1.2. Roof coverings shall be Class A as specified in the Building Code. Wood shingles and wood shakes are prohibited in any Fire Hazard Severity Zone regardless of classification.

SECTION 18. Section 701A.7 is hereby added to read as follows:
701A.7 California Wildland-Urban Interface Code,
Section 504.5.2.

Modify the California Wildland-Urban Interface Code Section 504.5.2 to read as follows:

Enclosure A
83 HOA.105556295.10 19
504.5.2 Exterior wall coverings.

Exterior wall coverings shall comply with one or more of the following requirements:

1. Noncombustible material.

2. Ignition-resistant building material labeled for exterior use.

3. Fire-retardant treated wood labeled for exterior use and complying with the requirements of Section 2303.2 of the California Building Code.

4. Fire-retardant-treated wood shingles and shakes which have been qualified in accordance with Section 1505.6 of the California Building Code for use as "Class B" roof covering shall be an acceptable alternative wall covering material where installed over solid sheathing.Reserved.

Exception:

Exterior wall coverings which are a component of an approved wall assembly complying with Section 504.5.

SECTION 19. Section 1031.2.1 is hereby amended to read as follows:
1031.2.1 Operational constraints and opening control devices. . . .

Where security bars (burglar bars) are installed on emergency egress and rescue windows or doors, on or after July 1, 2000, such devices shall comply with California Building Standards Code, Part 12, Chapter 12-3 and other applicable provisions of Part 2.
. . .

Enclosure A
84 HOA.105556295.10 20
SECTION 20. Table 1507.3.7 is hereby amended to read as follows:

TABLE 1507.3.7
CLAY AND CONCRETE TILE ATTACHMENT a, b, c
GENERAL – CLAY OR CONCRETE ROOF TILE
Maximum
Allowable Stress
Design Wind
Speed, Vasdf
(mph)
Mean roof
height (feet) Roof slope <3:12 Roof slope 3:12 and over 85 0 - 60 Minimum slope: 2.5:12
One fastener per tile. Flat
tile without vertical laps,
Ttwo fasteners per tile.

Two fasteners per tile. Only one
fastener on slopes of 7:12 and less
for tiles with installed weight
exceeding 7.5 lbs/sq. ft. having a
width no greater than 16 inches.
100 0 - 40
. . . . . . . . .

INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS d, e (Installations on spaced/solid sheathing with battens or spaced sheathing) Maximum
Allowable Stress
Design Wind
Speed, Vasdf
(mph)
Mean roof
height (feet) Roof slope <5:12 Roof slope 5:12<12:12
Roof slope
12:12 and
over
85 0 - 60 Fasteners are not
required. Tiles with
installed weight less than 9
lbs/sq. ft. require not fewer
thanMinimum slope is
4:12. Oone fastener per
tile.

One fastener per
tile every other
row. Perimeter
tiles require one
fastener. Tiles
with installed
weight less than 9
lbs/sq.ft. require
not fewer than
one fastener per
tile.

One fastener
required for
every tile.

Tiles with
installed weight
less than 9
lbs./sq. ft.
require not
fewer than one
fastener per
tile.
100 0 - 40
. . . . . . . . .

INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS (Installations on solid sheathing without battens)
Maximum
Allowable Stress
Design Wind
Speed, Vasdf
(mph)
Mean roof
height (feet)
All Minimum roof slopes 4 units vertical in 12 units horizontal Maximum slope 7 units vertical in 12 units horizontal
. . . . . . . . .

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s, 1 pound per square foot = 4.882 kg/m2.
aMinimum fastener size. Hot dipped galvanized ring shank or other Ccorrosion-resistant nails not less than No. 11 gage with 5/16-inch head. Fasteners shall be long enough to penetrate into the sheathing ¾ inch or through the thickness of the sheathing, Enclosure A
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whichever is less. Attaching wire for clay and concrete tile shall not be smaller than

0.083 inch and shall be copper, brass, or stainless steel. . . .

SECTION 21. Section 1613.8 is hereby added to read as follows:
1613.8 Modifications to ASCE 7.

The text of ASCE 7 shall be modified as indicated in Sections 1613.8.1 through 1613.8.3.
1613.8.1 ASCE 7, 12.2.3.1, Exception 3.

Modify ASCE 7, Section 12.2.3.1, Exception 3, to read as follows:

3. Detached one- and two-family dwellings up to two stories in height of light frame construction.
1613.8.2 ASCE 7, Section 12.11.2.2.3.

Modify ASCE 7, Section 12.11.2.2.3, to read as follows:

12.11.2.2.3 Wood diaphragms.

The anchorage of concrete or masonry structural walls to wood diaphragms shall be in accordance with AWC SDPWS 4.1.5.1 and this sSection. Continuous ties required by this sSection shall be in addition to the diaphragm sheathing. Anchorage shall not be accomplished by use of toenails or nails subject to withdrawal, nor shall wood ledgers or framing be used in cross-grain bending or cross-grain tension. The diaphragm sheathing shall not be considered effective as providing ties or struts required by this Section.

For structures assigned to Seismic Design Category D, E, or F, wood diaphragms supporting concrete or masonry walls shall comply with the following:

Enclosure A
86 HOA.105556295.10 22

1. The spacing of continuous ties shall not exceed 40 feet. Added chords of diaphragms may be used to form subdiaphragms to transmit the anchorage forces to the main continuous crossties.

2. The maximum diaphragm shear used to determine the depth of the subdiaphragm shall not exceed 75 percent of the maximum diaphragm shear. 1613.8.3 ASCE 7, 12.12.3.

Modify ASCE 7, Section 12.12.2, to read as follows:

All portions of the structure shall be designed and constructed to act as an integral unit in resisting seismic forces unless separated structurally by a distance sufficient to avoid damaging contact as set forth in this section.

Separations shall allow for the Maximum Design Earthquake Displacements, MDE, as determined in accordance with Section 12.8.6Equation 12.12-1:

MDE = Cd e + di
(Equation 12.12-1)
SECTION 22. Section 1613.9 is hereby added to read as follows:
1613.9 Seismic design provisions for hillside buildings. 1613.9.1 Purpose.

The purpose of this Section is to establish minimum regulations for the design and construction of new buildings and additions to existing buildings when constructing such buildings on or into slopes steeper than one unit vertical in three units horizontal (33.3 percent). These regulations establish minimum standards for seismic force resistance to reduce the risk of injury or loss of life in the event of earthquakes.

Enclosure A
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1613.9.2 Scope.

The provisions of this Section shall apply to the design of the lateral-forceresisting system for hillside buildings at and below the base level diaphragm. The design of the lateral-force-resisting system above the base level diaphragm shall be in accordance with the provisions for seismic and wind design as required elsewhere in this Chapter.

Exceptions:

1. Non-habitable accessory buildings and decks not supporting or supported from the main building are exempt from these regulations.

2. Additions to existing buildings that do not exceed 10 percent of the existing floor area provided that the addition is being supported completely by the existing foundation.
1613.9.3 Definitions.

For the purposes of this Section certain terms are defined as follows:

BASE LEVEL DIAPHRAGM is the floor at, or closest to, the top of the highest level of the foundation.

DIAPHRAGM ANCHORS are assemblies that connect a diaphragm to the adjacent foundation at the uphill diaphragm edge.

DOWNHILL DIRECTION is the descending direction of the slope approximately perpendicular to the slope contours.

FOUNDATION is concrete or masonry that supports a building, including footings, stem walls, retaining walls, and grade beams.

Enclosure A
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FOUNDATION EXTENDING IN THE DOWNHILL DIRECTION is a foundation running downhill and approximately perpendicular to the uphill foundation.

HILLSIDE BUILDING is any building or portion thereof constructed on or into a slope steeper than one unit vertical in three units horizontal (33.3 percent). If only a portion of the building is supported on or into the slope, these regulations apply to the entire building.

PRIMARY ANCHORS are diaphragm anchors designed for and providing a direct connection as described in Sections 1613.9.5 and 1613.9.7.3 between the diaphragm and the uphill foundation.

SECONDARY ANCHORS are diaphragm anchors designed for and providing a redundant diaphragm to foundation connection, as described in Sections 1613.9.6 and 1613.9.7.4.

UPHILL DIAPHRAGM EDGE is the edge of the diaphragm adjacent and closest to the highest ground level at the perimeter of the diaphragm.

UPHILL FOUNDATION is the foundation parallel and closest to the uphill diaphragm edge.
1613.9.4 Analysis and design.
1613.9.4.1 General.

Every hillside building within the scope of this Section shall be analyzed, designed, and constructed in accordance with the provisions of this Chapter. When the code-prescribed wind design produces greater effects, the wind design shall govern, but detailing requirements and limitations prescribed in this Section and all referenced Enclosure A
89 HOA.105556295.10 25
Sections shall be followed.
1613.9.4.2 Base level diaphragm-downhill direction.

The following provisions shall apply to the seismic analysis and design of the connections for the base level diaphragm in the downhill direction. 1613.9.4.2.1 Base for lateral force design defined.

For seismic forces acting in the downhill direction, the base of the building shall be the floor at, or closest to, the top of the highest level of the foundation. 1613.9.4.2.2 Base shear.

In developing the base shear for seismic design, the response modification coefficient (R) shall not exceed 5 for bearing wall and building frame systems. The total base shear shall include the forces tributary to the base level diaphragm, including forces from the base level diaphragm.
1613.9.5 Base shear resistance for primary anchors.
1613.9.5.1 General.

The base shear in the downhill direction shall be resisted through primary anchors from diaphragm struts provided in the base level diaphragm to the foundation. 1613.9.5.2 Location of primary anchors.

A primary anchor and diaphragm strut shall be provided in line with each foundation extending in the downhill direction. Primary anchors and diaphragm struts shall also be provided where interior vertical lateral-force-resisting elements occur above and in contact with the base level diaphragm. The spacing of primary anchors and diaphragm struts or collectors shall in no case exceed 30 feet (9,144 mm).

Enclosure A
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1613.9.5.3 Design of primary anchors and diaphragm struts.

Primary anchors and diaphragm struts shall be designed in accordance with the requirements of Section 1613.9.8.
1613.9.5.4 Limitations.

The following lateral-force-resisting elements shall not be designed to resist seismic forces below the base level diaphragm in the downhill direction:

1. Wood structural panel wall sheathing;

2. Cement plaster and lath;

3. Gypsum wallboard; and

4. Tension-only braced frames.

Braced frames designed in accordance with the requirements of Section 2205.2.2 may be used to transfer forces from the primary anchors and diaphragm struts to the foundation provided lateral forces do not induce flexural stresses in any member of the frame or in the diaphragm struts. Deflections of frames shall account for the variation in slope of diagonal members when the frame is not rectangular.
1613.9.6 Base shear resistance for secondary anchors.
1613.9.6.1 General.

In addition to the primary anchors required by Section 1613.9.5, the base shear in the downhill direction shall be resisted through secondary anchors in the uphill foundation connected to diaphragm struts in the base level diaphragm.

Enclosure A
91 HOA.105556295.10 27
Exception: Secondary anchors are not required where foundations extending in the downhill direction spaced at not more than 30 feet (9,144 mm) on center extend up to and are directly connected to the base level diaphragm for at least 70 percent of the diaphragm depth.
1613.9.6.2 Secondary anchor capacity and spacing.

Secondary anchors at the base level diaphragm shall be designed for a minimum force equal to the base shear, including forces tributary to the base level diaphragm, but not less than 600 pounds per lineal foot (8.76 kN/m). The secondary anchors shall be uniformly distributed along the uphill diaphragm edge and shall be spaced at a maximum of four feet (1,219 mm) on center.
1613.9.6.3 Design.

Secondary anchors and diaphragm struts shall be designed in accordance with Section 1613.9.8.
1613.9.7 Diaphragms below the base level for downhill direction.

The following provisions shall apply to the lateral analysis and design of the connections for all diaphragms below the base level diaphragm in the downhill direction. 1613.9.7.1 Diaphragm defined.

Every floor level below the base level diaphragm shall be designed as a diaphragm.

Enclosure A
92 HOA.105556295.10 28
1613.9.7.2 Design force.

Each diaphragm below the base level diaphragm shall be designed for all tributary loads at that level using a minimum seismic force factor not less than the base shear coefficient.
1613.9.7.3 Design force-resistance for primary anchors.

The design force described in Section 1613.9.7.2 shall be resisted through primary anchors from diaphragm struts provided in each diaphragm to the foundation.

Primary anchors shall be provided and designed in accordance with the requirements and limitations of Section 1613.5.5.
1613.9.7.4 Design force-resistance for secondary anchors. 1613.9.7.4.1 General.

In addition to the primary anchors required in Section 1613.9.7.3, the design force in the downhill direction shall be resisted through secondary anchors in the uphill foundation connected to diaphragm struts in each diaphragm below the base level.

Exception: Secondary anchors are not required where foundations extending in the downhill direction, spaced at not more than 30 feet (9,144 mm) on center, extend up to and are directly connected to each diaphragm below the base level for at least 70 percent of the diaphragm depth.

Enclosure A
93 HOA.105556295.10 29
1613.9.7.4.2 Secondary anchor capacity.

Secondary anchors at each diaphragm below the base level diaphragm shall be designed for a minimum force equal to the design force but not less than 300 pounds per lineal foot (4.38 kN/m). The secondary anchors shall be uniformly distributed along the uphill diaphragm edge and shall be spaced at a maximum of four feet (1,219 mm) on center.
1613.9.7.4.3 Design.

Secondary anchors and diaphragm struts shall be designed in accordance with Section 1613.9.8.
1613.9.8 Primary and secondary anchorage and diaphragm strut design.

Primary and secondary anchors and diaphragm struts shall be designed in accordance with the following provisions:

1. Fasteners. All bolted fasteners used to develop connections to wood members shall be provided with square plate washers at all bolt heads and nuts.

Washers shall be minimum 0.229 inch by 3 inches by 3 inches (5.82 mm by 76 mm by 76 mm) in size. Nuts shall be tightened to finger tight plus one-half (1/2) wrench turn prior to covering the framing.

2. Fastening. The diaphragm to foundation anchorage shall not be accomplished by the use of toenailing, nails subject to withdrawal, or wood in crossgrain bending or cross-grain tension.

Enclosure A
94 HOA.105556295.10 30

3. Size of Wood Members. Wood diaphragm struts, collectors, and other wood members connected to primary anchors shall not be less than three-inch (76 mm) nominal width. The effects of eccentricity on wood members shall be evaluated as required per Item 9.

4. Design. Primary and secondary anchorage, including diaphragm struts, splices, and collectors shall be designed for 125 percent of the tributary force.

5. Allowable Stress Increase. The one-third allowable stress increase permitted under Section 1605.2 shall not be taken when the working (allowable) stress design method is used.

6. Steel Element of Structural Wall Anchorage System. The strength design forces for steel elements of the structural wall anchorage system, with the exception of anchor bolts and reinforcing steel, shall be increased by 1.4 times the forces otherwise required.

7. Primary Anchors. The load path for primary anchors and diaphragm struts shall be fully developed into the diaphragm and into the foundation. The foundation must be shown to be adequate to resist the concentrated loads from the primary anchors.

8. Secondary Anchors. The load path for secondary anchors and diaphragm struts shall be fully developed in the diaphragm but need not be developed beyond the connection to the foundation.

Enclosure A
95 HOA.105556295.10 31

9. Symmetry. All lateral force foundation anchorage and diaphragm strut connections shall be symmetrical. Eccentric connections may be permitted when demonstrated by calculation or tests that all components of force have been provided for in the structural analysis or tests.

10. Wood Ledgers. Wood ledgers shall not be used to resist cross-grain bending or cross-grain tension.
1613.9.9 Lateral-force-resisting elements normal to the downhill direction.
1613.9.9.1 General.

In the direction normal to the downhill direction, lateral-force-resisting elements shall be designed in accordance with the requirements of this Section. 1613.9.9.2 Base shear.

In developing the base shear for seismic design, the response modification coefficient (R) shall not exceed 5 for bearing wall and building frame systems. 1613.9.9.3 Vertical distribution of seismic forces.

For seismic forces acting normal to the downhill direction the distribution of seismic forces over the height of the building using Section 12.8.3 of ASCE 7 shall be determined using the height measured from the top of the lowest level of the building foundation.

Enclosure A
96 HOA.105556295.10 32
1613.9.9.4 Drift limitations.

The story drift below the base level diaphragm shall not exceed 0.007 times the story height at strength design force level. The total drift from the base level diaphragm to the top of the foundation shall not exceed 3/4 inch (19 mm). Where the story height or the height from the base level diaphragm to the top of the foundation varies because of a stepped footing or story offset, the height shall be measured from the average height of the top of the foundation. The story drift shall not be reduced by the effect of horizontal diaphragm stiffness.
1613.9.9.5 Distribution of lateral forces.
1613.9.9.5.1 General.

The design lateral force shall be distributed to lateral-force-resisting elements of varying heights in accordance with the stiffness of each individual element. 1613.9.9.5.2 Wood structural panel sheathed walls.

The stiffness of a stepped wood structural panel shear wall may be determined by dividing the wall into adjacent rectangular elements, subject to the same top of wall deflection. Deflections of shear walls may be estimated by AWC SDPWS Section 4.3.2.

Sheathing and fastening requirements for the stiffest section shall be used for the entire wall. Each section of wall shall be anchored for shear and uplift at each step. The minimum horizontal length of a step shall be 8 feet (2438 mm) and the maximum vertical height of a step shall be 2 feet, 8 inches (813 mm).

Enclosure A
97 HOA.105556295.10 33
1613.9.9.5.3 Reinforced concrete or masonry shear walls.

Reinforced concrete or masonry shear walls shall have forces distributed in proportion to the rigidity of each section of the wall. 1613.9.9.6 Limitations.

The following lateral force-resisting-elements shall not be designed to resist lateral forces below the base level diaphragm in the direction normal to the downhill direction:

1. Cement plaster and lath;

2. Gypsum wallboard; and

3. Tension-only braced frames.

Braced frames designed in accordance with the requirements of Section 2202.2.1.2 of this Code may be designed as lateral-force-resisting elements in the direction normal to the downhill direction, provided lateral forces do not induce flexural stresses in any member of the frame. Deflections of frames shall account for the variation in slope of diagonal members when the frame is not rectangular. 1613.9.10 Specific design provisions.
1613.9.10.1 Footings and grade beams.

All footings and grade beams shall comply with the following:

1. Grade beams shall extend at least 12 inches (305 mm) below the lowest adjacent grade and provide a minimum 24-inch (610 mm) distance horizontally from the bottom outside face of the grade beam to the face of the descending slope.

Enclosure A
98 HOA.105556295.10 34

2. Continuous footings shall be reinforced with at least two No. 4 reinforcing bars at the top and two No. 4 reinforcing bars at the bottom.

3. All main footing and grade beam reinforcement steel shall be bent into the intersecting footing and fully developed around each corner and intersection.

4. All concrete stem walls shall extend from the foundation and be reinforced as required for concrete or masonry walls.
1613.9.10.2 Protection against decay and termites.

All wood to earth separation shall comply with the following:

1. Where a footing or grade beam extends across a descending slope, the stem wall, grade beam, or footing shall extend up to a minimum 18 inches (457 mm) above the highest adjacent grade.

Exception: At paved garage and doorway entrances to the building, the stem wall need only extend to the finished concrete slab, provided the wood framing is protected with a moisture proof barrier.

2. Wood ledgers supporting a vertical load of more than 100 pounds per lineal foot (1.46 kN/m) based on Allowable Stress Design (ASD) levels and located within 48 inches (1219 mm) of adjacent grade are prohibited. Galvanized steel ledgers and anchor bolts, with or without wood nailers, or treated or decay resistant sill plates supported on a concrete or masonry seat, may be used.
1613.9.10.3 Sill plates.

All sill plates and anchorage shall comply with the following:

Enclosure A
99 HOA.105556295.10 35

1. All wood framed walls, including nonbearing walls, when resting on a footing, foundation, or grade beam stem wall, shall be supported on wood sill plates bearing on a level surface.

2. Power-driven fasteners shall not be used to anchor sill plates except at interior nonbearing walls not designed as shear walls.
1613.9.10.4 Column base plate anchorage.

The base of isolated wood posts (not framed into a stud wall) supporting a vertical load of 4,000 pounds (17.8 kN) or more based on ASD levels, and the base plate for a steel column shall comply with the following:

1. When the post or column is supported on a pedestal extending above the top of a footing or grade beam, the pedestal shall be designed and reinforced as required for concrete or masonry columns. The pedestal shall be reinforced with a minimum of four No. 4 bars extending to the bottom of the footing or grade beam. The top of exterior pedestals shall be sloped for positive drainage.

2. The base plate anchor bolts or the embedded portion of the post base, and the vertical reinforcing bars for the pedestal, shall be confined with two No. 4 or three No. 3 ties within the top 5 inches (127 mm) of the concrete or masonry pedestal.

The base plate anchor bolts shall be embedded a minimum of 20 bolt diameters into the concrete or masonry pedestal. The base plate anchor bolts and post bases shall be galvanized and each anchor bolt shall have at least two galvanized nuts above the base plate.

Enclosure A
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HOA.105556295.10 36
1613.9.10.5 Steel beam to column supports.

All steel beam to column supports shall be positively braced in each direction.

Steel beams shall have stiffener plates installed on each side of the beam web at the column. The stiffener plates shall be welded to each beam flange and the beam web.

Each brace connection or structural member shall consist of at least two 5/8 inch (15.9 mm) diameter machine bolts.

SECTION 23. Section 1613.10 is hereby added to read as follows:
1613.10 Suspended ceilings.

Minimum design and installation standards for suspended ceilings shall be determined in accordance with the requirements of Section 2506.2.1 and this Section. 1613.10.1 Scope.

This part contains special requirements for suspended ceilings and lighting systems. Provisions of Section 13.5.6 of ASCE 7 shall apply except as modified herein. 1613.10.2 General.

The suspended ceilings and lighting systems shall be limited to 6 feet (1828 mm) below the structural deck unless the lateral bracing is designed by a licensed engineer or architect.
1613.10.3 Sprinkler heads.

All sprinkler heads (drops) except fire-resistance-rated floor/ceiling or roof/ceiling assemblies, shall be designed to allow for free movement of the sprinkler pipes with oversize rings, sleeves or adaptors through the ceiling tile. Sprinkler heads and other penetrations shall have a 2-inch (50mm) oversize ring, sleeve, or adapter through the Enclosure A
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HOA.105556295.10 37
ceiling tile to allow for free movement of at least 1 inch (25mm) in all horizontal directions. Alternatively, a swing joint that can accommodate 1 inch (25 mm) of ceiling movement in all horizontal directions is permitted to be provided at the top of the sprinkler head extension.

Sprinkler heads penetrating fire-resistance-rated floor/ceiling or roof/ceiling assemblies shall comply with Section 714.
1613.10.4 Special requirements for means of egress.

Suspended ceiling assemblies located along means of egress serving an occupant load of 30 or more and at lobbies accessory to Group A Occupancies shall comply with the following provisions.
1613.10.4.1 General.

Ceiling suspension systems shall be connected and braced with vertical hangers attached directly to the structural deck along the means of egress serving an occupant load of 30 or more and at lobbies accessory to Group A Occupancies. Spacing of vertical hangers shall not exceed 2 feet (610 mm) on center along the entire length of the suspended ceiling assembly located along the means of egress or at the lobby. 1613.10.4.2 Assembly device.

All lay-in panels shall be secured to the suspension ceiling assembly with two hold-down clips minimum for each tile within a 4-foot (1219 mm) radius of the exit lights and exit signs.

Enclosure A
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1613.10.4.3 Emergency systems.

Independent supports and braces shall be provided for light fixtures required for exit illumination. Power supply for exit illumination shall comply with the requirements of Section 1008.2.4 of this Code.
1613.10.4.4 Supports for appendages.

Separate support from the structural deck shall be provided for all appendages such as light fixtures, air diffusers, exit signs, and similar elements.

SECTION 24. Section 1704.2.3 is hereby amended to read as follows:
1704.2.3 Statement of special inspections.

The applicant shall submit a statement of special inspections in accordance with Section 106.4107.1 as a condition for permit issuance. This statement shall be in accordance with Section 1704.3.
. . .

SECTION 25. Section 1704.6 is hereby amended to read as follows:
1704.6 Structural observations.

Where required by the provisions of Section 1704.6.1 the owner or the owner's authorized agent shall employ a registered design professionalstructural observer to perform structural observations. The structural observer shall visually observe representative locations of structural systems, details and load paths for general conformance to the approved construction documents. Structural observation does not include or waive the responsibility for the inspections in Section 110108 or the special inspections in Section 1705 or other sections of this cCode. The structural observer Enclosure A
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shall be one of the following individuals:

1. The registered design professional responsible for the structural design, or

2. A registered design professional designated by the registered design professional responsible for the structural design.

Prior to the commencement of observations, the structural observer shall submit to the bBuilding oOfficial a written statement identifying the frequency and extent of structural observations.

At the conclusion of the work included in the permit, the structural observer shall submit to the building official a written statement that the site visits have been made and identify any reported deficiencies that, to the best of the structural observer's knowledge, have not been resolved.

The owner or owner's authorized agent shall coordinate and call a preconstruction meeting between the structural observer, contractors, affected subcontractors, and special inspectors. The structural observer shall preside over the meeting. The purpose of the meeting shall be to identify the major structural elements and connections that affect the vertical and lateral load resisting systems of the structure and to review scheduling of the required observations. A record of the meeting shall be included in the report submitted to the Building Official.

Observed deficiencies shall be reported in writing to the owner or owner's authorized agent, special inspector, contractor, and the Building Official. Upon the form prescribed by the Building Official, the structural observer shall submit to the Building Official a written statement at each significant construction stage stating that the site Enclosure A
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visits have been made and identifying any reported deficiencies that, to the best of the structural observer's knowledge, have not been resolved. A final report by the structural observer, which states that all observed deficiencies have been resolved, is required before acceptance of the work by the Building Official.

SECTION 26. Section 1704.6.1 is hereby amended to read as follows:
1704.6.1 Structural observations for structures.
. . .

3. The structure is assigned to Seismic Design Category E, and is greater than two stories above the grade planeA lateral design is required for the structure or portion thereof.

Exception: One-story wood framed Group R-3 and Group U Occupancies less than 2,000 square feet in area, provided the adjacent grade is not steeper than 1 unit vertical in 10 units horizontal (10 percent sloped), assigned to Seismic Design Category D.
. . .

SECTION 27. Section 1705.3 is hereby amended to read as follows:
1705.3 Concrete Construction.

Special inspections and tests of concrete construction shall be performed in accordance with this section and Table 1705.3.

Exception: Special inspections and tests shall not be required for:

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1. Isolated spread concrete footings of buildings three stories or less above grade plane that are fully supported on earth or rock where the structural design of the footing is based on a specified compressive strength (f'c) not greater than 2,500 pounds per square inch (psi) (17.2 Mpa) regardless of the compressive strength specified in the construction documents or used in the footing construction. . . .

4. Concrete foundation walls constructed in accordance with Table 1807.1.6.2.

54. Concrete patios, driveways and sidewalks, on grade.

SECTION 28. Section 1705.13 is hereby amended to read as follows:
1705.13 Special inspections for seismic resistance.
. . .

Exception: The special inspections specified in Sections 1705.13.1 through 1705.13.9 are not required for structures designed and constructed in accordance with one of the following:
. . .

3. The structure is a detached one- or two-family dwelling not exceeding two stories above grade plane, provided the structure is not assigned to Seismic Design Category D, E, or F and does not have any of the following horizontal or vertical irregularities in accordance with Section 12.3 of ASCE 7:
. . .

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SECTION 29. Section 1807.1.4 is hereby amended to read as follows:
1807.1.4 Permanent wood foundations systems.

Permanent wood foundation systems shall be designed and installed in accordance with AWC PWF. Lumber and plywood shall be preservative treated in accordance with AWPA U1 (Commodity Specification A, Special Requirement 4.2), and shall be identified in accordance with Section 2303.1.9.1. Permanent wood foundation systems shall not be used for structures assigned to Seismic Design Category D, E, or F.

SECTION 30. Section 1807.1.6 is hereby amended to read as follows:
1807.1.6 Prescriptive design of concrete and masonry foundation walls.

Concrete and masonry foundation walls that are laterally supported at the top and bottom shall be permitted to be designed and constructed in accordance with this section. Prescriptive design of foundation walls shall not be used for structures assigned to Seismic Design Category D, E, or F.

SECTION 31. Section 1807.2 is hereby amended to read as follows:
1807.2 Retaining walls.

Retaining walls shall be designed in accordance with Section 1807.2.1 through 1807.2.4. Retaining walls assigned to Seismic Design Category D, E, or F shall not be partially or wholly constructed of wood.

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SECTION 32. Section 1807.3.1 is hereby amended to read as follows:
1807.3.1 Limitations.

The design procedures outlined in this section are subject to the following limitations:

1. The frictional resistance for structural walls and slabs on silts and clays shall be limited to one-half of the normal force imposed on the soils by the weight of the footing or slab.

2. Posts embedded in earth shall not be used to provide lateral support for structural or nonstructural materials such as plaster, masonry or concrete unless bracing is provided that develops the limited deflection required.

Wood poles shall be treated in accordance with AWPA U1 for sawn timber posts (Commodity Specification A, Use Category 4B) and for round timber posts (Commodity Specification B, Use Category 4B). Wood poles and posts embedded in direct contact with soil shall not be used for structures assigned to Seismic Design Category D, E, or F.

Wood poles and posts embedded in accordance with Methods 2 and 3 of Section 1807.3.3 shall not be permitted for structures assigned to Seismic Design Category D, E, or F, except when used to support nonhabitable, nonoccupiable structures such as fences when approved by the Building Official.

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SECTION 33. Section 1809.3 is hereby amended to read as follows:
1809.3 Stepped footings.
. . .

For structures assigned to Seismic Design Category D, E, or F, the stepping requirement shall also apply to the top surface of continuous footings supporting walls.

Footings shall be reinforced with four No. 4 reinforcing bars. Two bars shall be located at the top and bottom of the footings as shown in Figure 1809.3.

SECTION 34. Figure 1809.3 is hereby added to read as follows:

FIGURE 1809.3

STEPPED FOOTING
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SECTION 35. Section 1809.7 is hereby amended to read as follows:
1809.7 Prescriptive footings for light-frame construction.

Where a specific design is not provided, concrete or masonry-unit footings supporting walls of light-frame construction shall be permitted to be designed in accordance with Table 1809.7. Prescriptive footings in accordance with Table 1809.7 shall not be used to support structures that exceed one story above grade plane and are assigned to Seismic Design Category D, E, or F.

SECTION 36. Table 1809.7 is hereby amended to read as follows:

TABLE 1809.7

PRESCRIPTIVE FOOTINGS SUPPORTING WALLS OF
LIGHT-FRAME CONSTRUCTION a, b, c, d, e

NUMBER OF FLOORS
SUPPORTED BY THE FOOTINGf

WIDTH OF
FOOTING (inches)

THICKNESS OF
FOOTING (inches)
1 12 6
2 15 6
3 18 8
g
. . .
c. Interior stud-bearing walls shall be permitted to be supported by isolated footings. The footing width and length shall be twice the width shown in this table, and footings shall be spaced not more than 6 feet on center.[Reserved]. . . .
g. Plain concrete footings for Group R-3 occupancies shall be permitted to be 6 inches thick[Deleted].

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SECTION 37. Section 1809.12 is hereby amended to read as follows:
1809.12 Timber footings.

Timber footings shall be permitted for buildings of Type V construction and as otherwise approved by the bBuilding oOfficial. Such footings shall be treated in accordance with AWPA U1 (Commodity Specification A, Use Category 4B). Treated timbers are not required where placed entirely below permanent water level, or where used as capping for wood piles that project above the water level over submerged or marsh lands. The compressive stresses perpendicular to grain in untreated timber footings supported upon treated piles shall not exceed 70 percent of the allowable stresses for the species and grade of timber as specified in the ANSI/AWC NDS.

Timber footings shall not be used in structures assigned to Seismic Design Category D, E, or F.

SECTION 38. Section 1810.3.2.4 is hereby amended to read as follows:
1810.3.2.4 Timber.

Timber deep foundation elements shall be designed as piles or poles in accordance with ANSI/AWC NDS. Round timber elements shall conform to ASTM D25.

Sawn timber elements shall conform to DOC PS-20. Timber shall not be used in structures assigned to Seismic Design Category D, E, or F.

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SECTION 39. Section 1905.1 is hereby amended to read as follows:
1905.1 General.

In addition to the provisions of ACI 318, structural concrete shall comply with the requirements of Section 1905. The text of ACI 318 shall be modified as indicated in Sections 1905.8 through 1905.10.

SECTION 40. Section 1905.6.2 is hereby amended to read as follows:
1905.6.2 Seismic Design Categories C, D, E, and F.

Structures assigned to Seismic Design Category C, D, E or F shall not have elements of structural plain concrete, except as follows:

1. Structural plain concrete basement, foundation or other walls below the base as defined in ASCE/SEI 7 are permitted in detached one- and two-family dwellings three stories or less in height constructed with stud-bearing walls. In dwellings assigned to Seismic Design Category D or E, the height of the wall shall not exceed 8 feet (2438 mm), the thickness shall not be less than 7½ inches (190 mm), and the wall shall retain no more than 4 feet (1219 mm) of unbalanced fill. Walls shall have reinforcement in accordance with 14.6.1 of ACI318.Concrete used for fill with a minimum cement content of 2 sacks of Portland cement or cementious material per cubic yard.

2. Isolated footings of plain concrete supporting pedestals or columns are permitted, provided that the projection of the footing beyond the face of the supported member does not exceed the footing thickness.

Exception: In detached one- and two-family dwellings three stories or less in height, the projection of the footing beyond the face of the supported member is Enclosure A
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permitted to exceed the footing thickness.

3. Plain concrete footings supporting walls are permitted, provided that the footings have at least two continuous longitudinal reinforcing bars. Bars shall not be smaller than No. 4 and shall have a total area of not less than 0.002 times the gross cross-sectional area of the footing. For footings that exceed 8 inches (203 mm) in thickness,nNot fewer than one bar shall be provided at the top and bottom of the footing. Continuity of reinforcement shall be provided at corners and intersections.

Exceptions:

1. Where assigned to Seismic Design Category C, dDetached one- and twofamily dwellings three stories or less in height and constructed with stud-bearing walls are permitted to have plain concrete footings without longitudinal reinforcementwith at least two continuous longitudinal reinforcing bars not smaller than No. 4 and a total area of less than 0.002 times the gross cross-sectional area of the footing.

2. For foundation systems consisting of a plain concrete footing and a plain concrete stemwall, not fewer than one bar shall be provided at the top of the stemwall and at the bottom of the footing.

3. Footings cast monolithically with a slab-on-ground shall have not fewer than one No. 4 bar at the top and bottom of the footing or one No. 5 bar or two No. 4 bars in the middle third of the footing depth.

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SECTION 41. Section 1905.7 is hereby amended to read as follows:
1905.7 Design requirements for anchors.

For the design requirements for anchors, Sections 1905.7.1 and 1905.7.2 provide exceptions that are permitted to ACI 318. These requirements shall be applicable to all buildings.
. . .

SECTION 42. Section 1905.8 is hereby added to read as follows:
1905.8 ACI 318, Section 18.7.5.

Modify ACI 318, Section 18.7.5, by adding Sections 18.7.5.8 and 18.7.5.9 as follows:

18.7.5.8 Where the calculated point of contraflexure is not within the middle half of the member clear height, provide transverse reinforcement as specified in ACI 318, Section 18.7.5.1, Items (a) through (c), over the full height of the member.

18.7.5.9 At any section where the design strength, Pn, of the column is less than the sum of the shears Ve computed in accordance with ACI 318, Sections 18.7.6.1 and 18.6.5.1, for all the beams framing into the column above the level under consideration, transverse reinforcement as specified in ACI 318, Sections 18.7.5.1 through 18.7.5.3, shall be provided. For beams framing into opposite sides of the column, the moment components may be assumed to be of opposite sign. For the determination of the design strength, Pn, of the column, these moments may be assumed to result from the deformation of the frame in any one principal axis.

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SECTION 43. Section 1905.9 is hereby added to read as follows:
1905.9 ACI 318, Section 18.10.4.

Modify ACI 318, Section 18.10.4, by adding Section 18.10.4.7 as follows:

18.10.4.7 Walls and portions of walls with Pu > 0.35Po shall not be considered to contribute to the calculated shear strength of the structure for resisting earthquakeinduced forces. Such walls shall conform to the requirements of ACI 318, Section 18.14.

SECTION 44. Section 1905.10 is hereby added to read as follows:
1905.10 ACI 318, Section 18.12.6.

Modify ACI 318, by adding Section 18.12.6.2, as follows:

18.12.6.2 Collector and boundary elements in topping slabs placed over precast floor and roof elements shall not be less than 3 inches (76 mm) or 6 db in thickness, where db is the diameter of the largest reinforcement in the topping slab.

SECTION 45. Section 2304.10.2 is hereby amended to read as follows:
2304.10.2 Fastener requirements.

Connections for wood members shall be designed in accordance with the appropriate methodology in Section 2302.1. The number and size of fasteners connecting wood members shall not be less than that set forth in Table 2304.10.2.

Staple fasteners in Table 2304.10.2 shall not be used to resist or transfer seismic forces in structures assigned to Seismic Design Category D, E, or F.

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Exception: Staples may be used to resist or transfer seismic forces when the allowable shear values are substantiated by cyclic testing and approved by the Building Official.

SECTION 46. Table 2304.10.2 is hereby amended to read as follows:

TABLE 2304.10.2
FASTENING SCHEDULEh
. . .
h. Staples shall not be used to resist or transfer seismic forces in structures assigned to Seismic Design Category D, E, or F.

SECTION 47. Section 2304.10.3.1 is hereby added to read as follows:
2304.10.3.1 Quality of nails.

In Seismic Design Category D, E, or F, mechanically-driven nails used in wood structural panel shear walls shall meet the same dimensions as that required for handdriven nails, including diameter, minimum length, and minimum head diameter. Clipped head or box nails are not permitted in new construction. The allowable design value for clipped head nails in existing construction may be taken at no more than the nail-headarea ratio of that of the same size hand-driven nails.

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SECTION 48. Section 2304.12.2.8 is hereby amended to read as follows:
2304.12.2.8 Wood used in retaining walls and cribs.

Wood installed in retaining or crib walls shall be preservative treated in accordance with AWPA U1 for soil and freshwater use. Wood shall not be used in retaining or crib walls for structures assigned to Seismic Design Category D, E, or F.

SECTION 49. Section 2305.4 is hereby added to read as follows:
2305.4 Hold-down connectors.

In Seismic Design Category D, E, or F, hold-down connectors shall be designed to resist shear wall overturning moments using 75 percent of the allowable seismic load values. Such values shall be established in a valid research report from approved sources or by accepted engineering practice and the provisions of this Code.

Exception: Values established by specialized cyclic and dynamic testing may be used when approved by the Building Official in accordance with Section 104.2.8.

Connector bolts into wood framing shall require steel plate washers on the post on the opposite side of the anchorage device. Plate size shall be a minimum of

0.229 inches by 3 inches by 3 inches (5.82 mm by 76 mm by 76 mm) in size. Holddown connectors shall be tightened to finger tight plus one-half (1/2) wrench turn just prior to covering the wall framing.

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SECTION 50. Section 2306.2 is hereby amended to read as follows:
2306.2 Wood-frame diaphragms.

Wood-frame diaphragms shall be designed and constructed in accordance with AWC SDPWS. Where panels are fastened to framing members with staples, requirements and limitations of AWC SDPWS shall be met and the allowable shear values set forth in Table 2306.2(1) or 2306.2(2) shall only be permitted for structures assigned to Seismic Design Category A, B, or C.

Exception: Allowable shear values where panels are fastened to framing members with staples may be used if such values are substantiated by cyclic testing and approved by the Building Official.

The allowable shear values in Tables 2306.2(1) and 2306.2(2) are permitted to be increased 40 percent for wind design.

Wood structural panel diaphragms used to resist seismic forces in structures assigned to Seismic Design Category D, E, or F shall be applied directly to the framing members.

Exception: Wood structural panel diaphragms are permitted to be fastened over solid lumber planking or laminated decking, provided the panel joints and lumber planking or laminated decking joints do not coincide.

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SECTION 51. Section 2306.3 is hereby amended to read as follows:
2306.3 Wood-frame shear walls.

Wood-frame shear walls shall be designed and constructed in accordance with AWC SDPWS. For structures assigned to Seismic Design Category D, E, or F, application of Tables 4.3A and 4.3B of AWC SDPWS shall include the following:

1. Wood structural panel thickness for shear walls shall not be less than 3/8 inch thick and studs shall not be spaced at more than 16 inches on center.

2. The maximum nominal unit shear capacities for 3/8 inch wood structural panels resisting seismic forces in structures assigned to Seismic Design Category D, E, or F is 560 pounds per linear foot (plf).

Exception: Other nominal unit shear capacities may be permitted if such values are substantiated by cyclic testing and approved by the Building Official.

3. Nails shall be placed not less than 1/2 inch from the panel edges and not less than 3/8 inch from the edge of the connecting members for shears greater than 350 plf using ASD or 500 plf using LRFD. Nails shall be placed not less than 3/8 inch from panel edges and not less than 1/4 inch from the edge of the connecting members for shears of 350 plf or less using ASD or 500 plf or less using LRFD.

For structures assigned to Seismic Design Category D, E, or F, application of Table 4.3B of ANSI/AWC SDPWS shall not be allowed.

For structures assigned to Seismic Design Category D, E, or F, application of Table 4.3C of ANSI/AWC SDPWS shall not be used below the top level in a multi-level building.

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Where panels are fastened to framing members with staples, requirements and limitations of AWC SDPWS shall be met and the allowable shear values set forth in Table 2306.3(1), 2306.3(2) or 2306.3(3) shall only be permitted for structures assigned to Seismic Design Category A, B, or C.

Exception: Allowable shear values where panels are fastened to framing members with staples may be used if such values are substantiated by cyclic testing and approved by the Building Official.

The allowable shear values in Tables 2306.3(1) and 2306.3(2) are permitted to be increased 40 percent for wind design. Panels complying with ANSI/APA PRP-210 shall be permitted to use design values for Plywood Siding in the AWC SDPWS.

Wood structural panel shear walls used to resist seismic forces in structures assigned to Seismic Design Category D, E, or F shall be applied directly to the framing members.

SECTION 52. Section 2307.2 is hereby added to read as follows:
2307.2 Wood-frame panel shear walls.

Wood-frame shear walls shall be designed and constructed in accordance with Section 2306.3 as applicable.

SECTION 53. Table 2308.10.1 is hereby amended to read as follows:

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TABLE 2308.10.1
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SECTION 54. Section 2308.10.5.1 is hereby amended to read as follows:
2308.10.5.1 Alternate braced wall (ABW).

An ABW shall be constructed in accordance with this section and Figure 2308.6.5.1. In one-story buildings, each panel shall have a length of not less than 2 feet 8 inches (813 mm) and a height of not more than 10 feet (3048 mm). Each panel shall be sheathed on one face with 3/8-inch (3.2 mm) minimum-thickness wood structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Table 2304.10.2 and blocked at wood structural panel edges. For structures assigned to Seismic Design Category D or E, each panel shall be sheathed on one face with 15/32-inch minimum-thickness (11.9 mm) wood structural panel sheathing nailed with 8d common nails spaced 3 inches on panel edges, 3 inches at intermediate supports. Two anchor bolts installed in accordance with Section 2308.7.1 shall be provided in each panel. Anchor bolts shall be placed at each panel outside quarter points. Each panel end stud shall have a hold-down device fastened to the foundation, capable of providing an approved uplift capacity of not less than 1,800 pounds (8006 N).

The hold-down device shall be installed in accordance with the manufacturer’s recommendations. The ABW shall be supported directly on a foundation or on floor framing supported directly on a foundation that is continuous across the entire length of the braced wall line. This foundation shall be reinforced with not less than one No. 4 bar top and bottom. Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned-down slab edge is permitted at door openings in the braced Enclosure A
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wall line. This continuous footing or turned-down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped 1524 inches (381610 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line.
. . .

SECTION 55. Figure 2308.10.5.1 is hereby amended to read as follows:

SECTION 56. Section 2308.10.5.2 is hereby amended to read as follows:
2308.10.5.2 Portal frame with hold-downs (PFH).

A PFH shall be constructed in accordance with this section and Figure 2308.10.5.2. The adjacent door or window opening shall have a full-length header.

In one-story buildings, each panel shall have a length of not less than 16 inches (406 mm) and a height of not more than 10 feet (3048 mm). Each panel shall be sheathed on one face with a single layer of 3/8-inch (9.5 mm) minimum-thickness wood FIGURE 2308.10.5.1
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structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Figure 2308.10.5.2. For structures assigned to Seismic Design Category D or E, each panel shall be sheathed on one face with 15/32-inch minimum-thickness (11.9 mm) wood structural panel sheathing nailed with 8d common nails spaced 3 inches on panel edges, 3 inches at intermediate supports and in accordance with Figure 2308.10.5.2. The wood structural panel sheathing shall extend up over the solid sawn or glued-laminated header and shall be nailed in accordance with Figure 2308.10.5.2. A built-up header consisting of at least two 2-inch by 12-inch (51 mm by 305 mm) boards, fastened in accordance with Item 24 of Table 2304.10.1 shall be permitted to be used. A spacer, if used, shall be placed on the side of the built-up beam opposite the wood structural panel sheathing. The header shall extend between the inside faces of the first full-length outer studs of each panel. The clear span of the header between the inner studs of each panel shall be not less than 6 feet (1829 mm) and not more than 18 feet (5486 mm) in length. A strap with an uplift capacity of not less than 1,000 pounds (4,400 N) shall fasten the header to the inner studs opposite the sheathing. One anchor bolt not less than 5/8 inch (15.9 mm) diameter and installed in accordance with Section 2308.3.1 shall be provided in the center of each sill plate. The studs at each end of the panel shall have a hold-down device fastened to the foundation with an uplift capacity of not less than 3,500 pounds (15 570 N).

Where a panel is located on one side of the opening, the header shall extend between the inside face of the first full-length stud of the panel and the bearing studs at the other end of the opening. A strap with an uplift capacity of not less than Enclosure A
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1,000 pounds (4400 N) shall fasten the header to the bearing studs. The bearing studs shall also have a hold-down device fastened to the foundation with an uplift capacity of not less than 1,000 pounds (4400 N). The hold-down devices shall be an embedded strap type, installed in accordance with the manufacturer’s recommendations. The PFH panels shall be supported directly on a foundation that is continuous across the entire length of the braced wall line. This foundation shall be reinforced with not less than one No. 4 bar top and bottom. Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned-down slab edge is permitted at door openings in the braced wall line. This continuous footing or turned-down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped not less than 1524 inches (381610 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line. . . .

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SECTION 57. Figure 2308.10.5.2 is hereby amended to read as follows:

SECTION 58. Section 2308.10.8.1 is hereby amended to read as follows:
2308.10.8.1 Foundation requirements.
. . .

Exception: For structures with a maximum plan dimension not more than 50 feet (15 240 mm), continuous foundations are required at exterior walls only for structures assigned to Seismic Design Category A, B, or C.

For structures in Seismic Design Categories D and E, exterior braced wall panels shall be in the same plane vertically with the foundation or the portion of the structure FIGURE 2308.10.5.2
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containing the offset shall be designed in accordance with accepted engineering practice and Section 2308.3.

Exceptions:

1. Exterior braced wall panels shall be permitted to be located not more than 4 feet (1219 mm) from the foundation below where supported by a floor constructed in accordance with all of the following:

1.1. Cantilevers or setbacks shall not exceed four times the nominal depth of the floor joists.

1.2. Floor joists shall be 2 inches by 10 inches (51 mm by 254 mm) or larger and spaced not more than 16 inches (406 mm) on center.

1.3. The ratio of the back span to the cantilever shall be not less than 2 to 1.

1.4. Floor joists at ends of braced wall panels shall be doubled.

1.5. A continuous rim joist shall be connected to the ends of cantilevered joists. The rim joist is permitted to be spliced using a metal tie not less than 0.058 inch (1.47 mm) (16 galvanized gage) and 11/2 inches (38 mm) in width fastened with six 16d common nails on each side. The metal tie shall have a yield stress not less than 33,000 psi (227 MPa).

1.6. Joists at setbacks or the end of cantilevered joists shall not carry gravity loads from more than a single story having uniform wall and roof loads nor carry the reactions from headers having a span of 8 feet (2438 mm) or more.

2. The end of a required braced wall panel shall be allowed to extend not Enclosure A
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more than 1 foot (305 mm) over an opening in the wall below. This requirement is applicable to braced wall panels offset in plane and braced wall panels offset out of plane as permitted by Exception 1. Braced wall panels are permitted to extend over an opening not more than 8 feet (2438 mm) in width where the header is a 4-inch by 12- inch (102 mm by 305 mm) or larger member.

SECTION 59. Section 2308.10.9 is hereby amended to read as follows:
2308.10.9 Attachment of sheathing.

Fastening of braced wall panel sheathing shall not be less than that prescribed in Tables 2308.10.1 or 2304.10.2. Wall sheathing shall not be attached to framing members by adhesives. Staple fasteners in Table 2304.10.2 shall not be used to resist or transfer seismic forces in structures assigned to Seismic Design Category D, E, or F.

Exception: Staples may be used to resist or transfer seismic forces when the allowable shear values are substantiated by cyclic testing and approved by the Building Official.

All braced wall panels shall extend to the roof sheathing and shall be attached to parallel roof rafters or blocking above with framing clips (18 gauge minimum) spaced at maximum 24 inches (6096 mm) on center with four 8d nails per leg (total eight 8d nails per clip). Braced wall panels shall be laterally braced at each top corner and at maximum 24-inch (6096 mm) intervals along the top plate of discontinuous vertical framing.

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SECTION 60. Section 3114 is hereby amended to read as follows:

SECTION 3114 INTERMODAL SHIPPING CONTAINERS
3114.1 General.
. . .

Exceptions:
. . .

6. Single-unit stand-alone intermodal shipping containers used as temporary storage or construction trailer on active construction sites. Construction support facilities for uses and activities not directly associated with the actual processes of construction, including, but not limited to, offices, meeting rooms, plan rooms, other administrative or support functions shall not be exempt from Section 3114. . . .
3114.8.4 Detailed structural design procedure.

A structural analysis meeting the requirements of this Section shall be provided to the building official to demonstrate the structural adequacy of the intermodal shipping containers.
3114.8.4.2 Seismic design parameters.

The seismic force-resisting system shall be designed and detailed in accordance with ASCE 7 and one of the following:
. . .

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3. Where all or portions of the profiled steel panel elements are retained and integrated into a seismic force-resisting system other than as permitted by Section 3114.8.4.2, Item 1, seismic design parameters shall be developed from testing and analysis in accordance with Section 104.2.39 and ASCE 7, Section 12.2.1.1 or 12.2.1.2.
. . .
3114.8.5.2 Structural design assumptions.

Where permitted by Section 3114.8.5.1, single-unit, stand-alone intermodal shipping containers shall be designed using the following assumptions for the profiled steel panel lateral-force resisting system side walls and end walls:

1. The appropriate detailing requirements contained in Chapters 16 through 23.

2. Response modification coefficient, R = 2,

3. Over strength factor, 0 = 2.5,

4. Deflection amplification factor, Cd = 2, and

5. Limits on structural height, hn = 9.5 feet (2900 mm). 3114.8.5.3 Allowable shear.

The allowable shear for the profiled steel panel side walls (longitudinal) and end walls (transverse) for wind design and seismic design using the coefficients of Section 3114.8.5.2 shall be in accordance with Table 3114.8.5.3, provided that all of the following conditions are met:
. . .

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3. All side walls or end walls used as part of the lateral force-resisting system shall have an existing or new boundary element on all sides to form a continuous load path, or paths, with adequate strength and stiffness to transfer all forces from the point of application to the final point of resistance, as shown in Figure 3114.8.5.3(3). The existing door interlocking mechanism shall not be considered as a component of the required load path.
. . .

SECTION 61. Chapter 99 is hereby amended to read as follows:

SECTION 9903 DEFINITION OF SUBSTANDARD BUILDING
9903.1
Any building or structure or portion thereof, regardless of zoning designation or approved uses of the building, including any dwelling unit, guestroom or suite of rooms, or the premises on which the same is located, in which there exists any of the conditions listed in Section 9904 to an extent that creates a public nuisance and endangers the life, limb, health, property, safety or welfare of the occupants of the building, nearby residents, or the public, shall be deemed and hereby is declared to be a substandard building.

SECTION 9904 SUBSTANDARD CONDITIONS
9904.1 Inadequate sanitation
. . .
9904.1.5
Lack of electrical lighting as required by this Code.

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9904.1.6
Infestation of insects, vermin, or rodents as determined by a health officer or, if an agreement does not exist with an agency that has a health officer, the infestation can be determined by an appropriate code enforcement officer. 9904.1.7
Visible mold growth, as determined by a health officer or a code enforcement officer, excluding the presence of mold that is minor and found on surfaces that can accumulate moisture as part of their properly functioning and intended use. 9904.1.8
Lack of connection to required sewage disposal system, as required by the Los Angeles County Plumbing Code.
9904.1.9
Lack of adequate garbage and rubbish storage and removal facilities, as determined by a health officer or, if an agreement does not exist with an agency that has a health officer, the lack of adequate garbage and rubbish removal facilities can be determined by an appropriate code enforcement officer.
. . .
9904.2 Structural Hazards
. . .
9904.2.5
Defective, damaged or inadequately constructed or sized fireplaces or chimneys. . . .

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9904.2.6
Inadequate structural resistance to horizontal forces.
. . .
9904.3 Inadequate or Hazardous Wiring.
9904.3.1
All wiring except that which conformed with all applicable laws in effect at the time of installation and which has been maintained in good and safe condition and is working properly and being used in a safe manner.
9904.4 Inadequate or Faulty Plumbing.
. . .
9904.4.2
All plumbing except that which conformed with all applicable laws in effect at the time of installation and which has been maintained in good condition and which is free of cross connections and siphonage between fixtures.
9904.5 Inadequate or Faulty Mechanical Equipment.
9904.5.1
Lack of safe, adequate heating facilities in a dwelling. . . .
9904.6 Faulty Weather Protection.
. . .

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9904.6.2
Lack of a sound and effective exterior wall covering or weather protection for exterior wall covering.
. . .
9904.6.4
Deteriorated or ineffective waterproofing of exterior walls, roofs, foundations, foundation walls or floor, including broken windows or doors. . . .
9904.9 Hazardous Buildings.
. . .
9904.13 Any Nuisance.

Those premises on which contains anything which is injurious to health, including, but not limited to, the illegal sale of controlled substances, or is indecent or offensive to the senses, or an obstruction to the free use of property, so as to interfere with the comfortable enjoyment of life or property, or unlawfully obstructs the free passage or use, in the customary manner, of any navigable public space.

SECTION 62. Section H103.1 is hereby amended to read as follows:

H103.1 Location restrictions.

Signs shall not be erected, constructed, or maintained so as to obstruct any fire escape or any window or door or opening used as part of a means of egress or as part of the accessible route, except as permitted by Chapters 10, 11A, and 11B, or so as to prevent free passage from one part of a roof to any other part thereof. A sign shall not Enclosure A
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be attached in any form, shape or manner to a fire escape, nor be placed in such manner as to interfere with any opening required for ventilation.

SECTION 63. Section H103.2 is hereby added as follows:

H103.2 Projections and clearances.

Signs extending beyond the exterior wall of the building shall comply with Section 705.2 and the following requirements.

Signs may project over a public street, public sidewalk or building line in accordance with Section 3202 and a distance as determined by the clearance of the bottoms thereof above the level of the sidewalk or grade immediately below, whichever is more restrictive, as follows:

Clearance less than 8 feet (2438 mm) shall be prohibited.

Clearance 8 feet (2438 mm) and above, a 1-foot (305 mm) projection is permitted; and for each additional 2-foot clearance (610 mm), an additional 1-foot (305 mm) projection is permitted.

No structure shall have a projection of more than 5 feet (1524 mm). A projecting sign built above and in connection with a marquee may have such a projection of 5 feet (1524 mm) without clearance between sign and marquee. No structure shall project beyond the curb line, regardless of clearance above grade.

Signs projecting more than 6 inches (152 mm) from the face of building over private property used or intended to be used by the general public shall have a minimum clearance of 8 feet (2438 mm) above said sidewalk or grade.

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No sign shall project into any alley whatsoever below a height of 14 feet (4267 mm) above grade, and no sign shall project into any alley by more than 6 inches (152 mm) when its height is 14 feet (4267 mm) or more above grade.

SECTION 64. Section H104.1 is hereby amended to read as follows:

H104.1 Identification.

Every outdoor advertising display sign other than wall signs hereafter erected, constructed or maintained, for which a permit is required, shall be plainly marked with the name of the person, firm or corporation erecting and maintaining such sign, and the weight of the sign, and shall have affixed on the front thereof the permit number issued for said sign or other method of identification approved by the bBuilding oOfficial.

SECTION 65. Section H105.1 is hereby amended to read as follows:

H105.1 General requirements.

Signs shall be designed and constructed to comply with the provisions of this cCode for use of materials, loads and stresses. Glass panels used in signs shall comply with the requirements of Chapter 24.

SECTION 66. Section H106.1 is hereby amended to read as follows:

H106.1 Illumination.

A sign shall not be illuminated by other than electrical means, and electrical devices and wiring shall be installed in accordance with the requirements of the California Electrical Code (Title 27) of the Los Angeles County Code, and a separate electrical permit shall be obtained. Any open spark or flame shall not be used for display purposes unless specifically approved.

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SECTION 67. Section H106.2 is hereby amended to read as follows:

H106.2 Electrical service.

Signs that require electrical service shall comply with NFPA 70the Electrical Code (Title 27) of the Los Angeles County Code.

SECTION 68. Section H110.1 is hereby amended to read as follows:

H110.1 General.

Roof signs shall be constructed entirely of metal or other approved noncombustible material except as provided for in Sections H106.1.1 and H107.1.

Provisions shall be made for electric grounding of metallic parts. Where combustible materials are permitted in letters or other ornamental features, wiring and tubing shall be kept free and insulated therefrom. Roof signs shall be so constructed as to leave a clear space of not less than 6 feet (1829 mm) between the roof level and the lowest part of the sign and shall have not less than 5 feet (11524 mm) clearance between the vertical supports thereof. Roof sign structures shall not project beyond an exterior wall.

Exception: Signs on flat roofs with every part of the roof accessible shall not be required to provide clear space between the roof level and the lowest part of the sign.

Blocks, angles, or supports fastened to the roof shall be located so as not to interfere with the drainage of the roof and, where necessary, flashing or counter flashing shall be placed.

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SECTION 69. Section H116 is hereby deleted in its entirety:

SECTION H116 REFERENCED STANDARDS
H.116.1 General. See Table H116.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard definition with the effective date, standard title, and the section or sections of this appendix that reference the standard.

TABLE H116.1

REFERENCED STANDARDS
ASTM D635-18 Test Method for Rate of
Burning and/or Extent
and Time of Burning of
Plastics in a Horizontal
Position
H107.1.1
CEC - 25 California Electrical Code H106.1, H106.2
NFPA 701-23 Methods of Fire Test for
Flame Propagation of
Textiles and Films
H106.1.1
SECTION 70. Section J101 is hereby amended to read as follows:

J101 GENERAL
J101.1 Scope.

The provisions of this chapterAppendix apply to grading, excavation, and earthwork construction, including fills and embankments, and the control of runoff from graded sites, including erosion sediments and construction-related pollutants. Where conflicts occur between the technical requirements of this chapter and the geotechnical report, the geotechnical report shall govern The purpose of this Appendix is to Enclosure A
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safeguard life, limb, property, and the public welfare by regulating grading on property subject to this Code.

J101.2 Flood hazard areas.

Unless the applicant has submitted an engineering analysisa hydrology and hydraulic analysis, prepared in accordance with standard engineering practice by a registered design professionalCalifornia licensed civil engineer, that demonstrates the proposed work will not result in any increase in the level of the base flood, grading, excavation and earthwork construction, including fills and embankments, shall not be permitted in floodways designated in Chapter 11.60 of Title 11 – Health and Safety – of the Los Angeles County Code, or in floodways that are in flood hazard areas established in Section 1612.3 or in flood hazard areas where design flood elevations are specified but floodways have not been designated.

J101.3 General hazards.

Whenever the Building Official determines that any existing excavation, embankment, or fill on property subject to this Code has become a hazard to life and limb, or endangers property, or adversely affects the safety, use, or stability of a public way or drainage channel, the Building Official may give written notice thereof to the owner of the property upon which the excavation, embankment, or fill is located, or other person or agent in control of said property. Upon receipt of said notice, the owner or other person or agent in control of the property shall repair, eliminate, or secure such excavation, embankment, or fill so as to eliminate the hazard, in conformance with the requirements of this Code, within the period specified in said notice.

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J101.4 Safety precautions.

If at any stage of the work the Building Official determines by inspection that unpermitted grading or grading work pursuant to a grading permit is likely to endanger any public or private property, or result in the deposition of debris on any public way, or interfere with any existing drainage course, the Building Official may order the work stopped by notice in writing served on any persons engaged in doing such work or causing such work to be done, and any such person shall immediately stop such work.

The Building Official may authorize the work to proceed if the Building Official finds that adequate safety precautions can be taken or corrective measures incorporated in the work to avoid likelihood of such danger, deposition, or interference.

If the grading work as done was performed without a grading permit or has created or resulted in a hazardous condition, the Building Official shall give written notice requiring correction thereof as specified in Section J103 and Section J101 of this Code.

J101.5 Protection of utilities.

Both the permittee and the owner of the property on which the grading is performed shall be responsible for the prevention of damage to any public and/or private utilities or services.

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J101.6 Protection of adjacent property.

Both the permittee and owner of the property on which the grading is performed shall be responsible for the prevention of damage to adjacent property. No person shall excavate on land sufficiently close to the property line to endanger any adjoining public street, sidewalk, alley, or other public or private property without taking adequate measures to support and protect such property from settling, cracking, or other damage that might result from the proposed work. Any person performing any grading that involves imported or exported materials shall take special precautions, as approved by the Building Official, to prevent such materials from being deposited on adjacent properties, any public way, and/or any drainage course.

J101.7 Storm water control measures.

Both the permittee and the owner of the property on which the grading is performed shall put into effect and maintain all precautionary measures necessary to protect adjacent water courses and public or private property from damage by erosion, flooding, and deposition of mud, debris, and construction-related pollutants originating from the site during grading and related construction activities.

J101.8 Maintenance of protective devices and rodent control.

All drainage structures and other protective devices and all burrowing rodent control measures, as shown on the grading plans approved by the Building Official, shall be maintained in a good condition and, when necessary, promptly repaired by the permittee or the owner of the property on which grading has been performed or by any other person or agent in control of such property.

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J101.9 Correlation with other sections.

The provisions of this Appendix are independent of the provisions of Chapter 99 – Building and Property Rehabilitation – of Title 26 of this Code. This Section may be applied even though the same facts have been used to determine that there is a building, structure, or substandard property subject to the provisions of Chapter 99.

J101.10 Conditions of approval.

In granting any permit under this Code, the Building Official may include such conditions as may be reasonably necessary to prevent the creation of a nuisance or hazard to public or private property. Such conditions may include, but shall not be limited to:

1. Improvement of any existing grading to comply with the standards of this Code.

2. Requirements for securing of excavations or fills that would otherwise be hazardous.

3. Requirements for temporary excavations and shoring that are to be implemented on site and shown on the plans.

4. Requirements for mitigating, stabilizing, or eliminating unpermitted grading conducted on site.

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SECTION 71. Section J102.1 is hereby amended to read as follows:

J102.1 Definitions.

The following words and terms shall, for the purposes of this appendix, have the meanings shown herein. Refer to Chapter 2 of this code for general definitionsFor the purposes of this Appendix, the terms, phrases, and words listed in this Section and their derivatives shall have the indicated meanings.

APPROVAL. When the proposed work or completed work conforms to this Appendix, as determined by and to the satisfaction of the Building Official.

AS-BUILT. See Section J105.12.

BEDROCK. The relatively solid, undisturbed rock in place either at the ground surface or beneath superficial deposits of alluvium, colluvium, and/or soil.

BENCH. A relatively level step excavated into earth material on which fill is to be placed.

BEST MANAGEMENT PRACTICE (BMP). Practices, prohibitions of practices, or other activities to reduce or eliminate the discharge of pollutants to surface waters.

BMPs include structural and nonstructural controls, management practices, operation and maintenance procedures, and system, design, and engineering methods that are required to be employed in order to comply with the requirements of the National Pollution Discharge Elimination System (NPDES) permit issued to the County of Los Angeles (see Section 106.4.3 and Title 31 – Green Building Standards Code – of the Los Angeles County Code).

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BORROW. Earth material acquired from an off-site location for use in grading on a site.

CIVIL ENGINEER. A professional engineer licensed in the State of California to practice in the field of civil works.

CIVIL ENGINEERING. The application of the knowledge of the forces of nature, principles of mechanics, and the properties of materials to the evaluation, design, and construction of civil works.

COMPACTION. The densification of a fill by mechanical means.

CUT. See "Excavation."
DESILTING BASINS. Physical structures, constructed for the removal of sediments from surface water runoff.

DESIGN ENGINEER. The Civil Engineer responsible for the preparation of the grading plans for the site grading work.

DOWN DRAIN. A device for collecting water from a swale or ditch located on or above a slope, and safely delivering it to an approved drainage facility.

EARTH MATERIAL. Any rock, natural soil, or fill, or any combination thereof.

ENGINEERING GEOLOGIST. A geologist experienced and knowledgeable in engineering geology, holding a license as a geologist in the specialty of engineering geology issued by the State of California under the applicable provisions of the Geologist and Geophysicist Act of the Business and Professions Code.

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ENGINEERING GEOLOGY. The application of geologic knowledge and principles in the investigation and evaluation of naturally occurring rock and soil for use in the design of civil works.

EROSION. The wearing away of the ground surface as a result of the movement of wind, water, or ice.

EXCAVATION. The removal of earth material by artificial means, also referred to as a cut.

FIELD ENGINEER. The Civil Engineer responsible for performing the functions as set forth in Section J105.3.

FILL. Deposition of earth materials by artificial means.

GEOTECHNICAL ENGINEER. See "Soils Engineer."
GEOTECHNICAL HAZARD. An adverse condition due to landslide, settlement, and/or slippage. These hazards include, but are not limited to, loose debris, slopewash, and mud flows from natural or graded slopes.

GRADE. The vertical location of the ground surface.

GRADE, EXISTING. The grade prior to grading.

GRADE, FINAL. See Section J105.7.

GRADE, FINISHED. The grade of the site at the conclusion of all grading efforts.

GRADE, INITIAL. See Section J105.7.

GRADE, ROUGH. See Section J105.7.

GRADING. An excavation or fill or combination thereof.

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KEY. A compacted fill placed in a trench excavated in earth material beneath the toe of a slope.

LANDSCAPE ARCHITECT. A person who holds a certificate to practice landscape architecture in the State of California under the applicable landscape architecture provisions of Division 3, Chapter 3.5, of the Business and Professions Code.

LINE. The horizontal location of the ground surface.

PERMITTEE. See Section J105.6.

PRIVATE SEWAGE DISPOSAL SYSTEM. A septic tank with effluent discharging into a subsurface disposal field, into one or more seepage pits, or into a combination of a subsurface disposal field and a seepage pit or of such other facilities as may be permitted in accordance with the procedures and requirements set forth in Title 28 – Plumbing Code – of the Los Angeles County Code and as required by the Los Angeles County Department of Public Health.

PROJECT CONSULTANTS. The professional consultants required by this Code, which may consist of the Design Engineer, Field Engineer, Soils Engineer, Engineering Geologist, and Landscape Architect as applicable to this Appendix.

PROFESSIONAL INSPECTION. The inspection required by this Code to be performed by the Project Consultants. Such inspections shall be sufficient to form an opinion relating to the conduct of the work.

QSD. Qualified SWPPP Developer as defined in the California State Construction General Permit.

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QSP. Qualified SWPPP Practitioner as defined in the California State Construction General Permit.

SITE. A lot or parcel of land or contiguous combination thereof, under the same ownership, where grading is performed or permitted.

SLOPE. An inclined surface, the inclination of which is expressed as a ratio of horizontal distance to vertical distance.

SOIL. Naturally occurring superficial deposits overlying parent bedrock.

SOILS ENGINEER (GEOTECHNICAL ENGINEER). A licensed civil engineer experienced and knowledgeable in the practice of soils engineering.

SOILS ENGINEERING (GEOTECHNICAL ENGINEERING). The application of the principles of soils mechanics in the investigation, evaluation, and design of civil works involving the use of earth materials and the inspection or testing of construction thereof.

STORM DRAIN SYSTEM. A conveyance or system of conveyances, including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, and man-made channels, designed or used for collecting and conveying storm water.

STORM WATER POLLUTION PREVENTION PLAN (SWPPP). A site drawing with details, notes, and related documents that identify the measures proposed by the permittee to: (1) control erosion and prevent sediment and construction-related pollutants from being carried offsite by storm water, and (2) prevent non-storm-water discharges from entering the storm drain system.

SURFACE DRAINAGE. Flows over the ground surface.

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SOIL TESTING AGENCY. An agency regularly engaged in the testing of soils and rock under the direction of a Civil Engineer experienced in soil testing.

TERRACE. A relatively level step constructed in the face of a graded slope for drainage and maintenance purposes.

SECTION 72. Section J103 is hereby amended to read as follows:

SECTION J103 PERMITS REQUIRED
J103.1 Permits required.

Except as exempted in Section J103.2, grading shall not be performed without first having obtained a permit therefor from the bBuilding oOfficial. A grading permit does not include the construction of retaining walls or other structures. A separate permit shall be obtained for each site and may cover both excavations and fills. Any engineered grading as described in Section J104.2.3 shall be performed by a contractor licensed by the State of California to perform the work described hereon. Regular grading less than 5,000 cubic yards may require a licensed contractor if the Building Official determines that special conditions or hazards exist.

J103.2 Exemptions.

A grading permit shall not be required for the following:

1. When approved by the Building Official, Ggrading in an isolated, selfcontained area, provided that the public is not endangered and that such grading will not adversely affect adjoining properties or public rights of way. . . .

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7. Exploratory excavations performed under the direction of a registered design professionalGeotechnical Engineer or Engineering Geologist. This shall not exempt grading of access roads or pads created for exploratory excavations.

Exploratory excavations must not create a hazardous condition to adjacent properties or the public in accordance with Section J101.3. A restoration plan must be provided and approved by the Building Official for all grading of access roads or pads. Restoration shall be completed within 90 days after the completion of soils testing unless otherwise approved by the Building Official.

8. An excavation that does not exceed 50 cubic yards (38.3 m3) and complies with one of the following conditions and as shown in Figure J103.2:
(a) Is less than 2 feet (0.6 m) in depth.
(b) Does not create a cut slope greater than 5 feet (1.5 m) measured vertically upward from the cut surface to the surface of the natural grade and is not steeper than 2 units horizontal to 1 unit vertical (50 percent slope).

9. A fill not intended to support a structure that does not obstruct a drainage course and complies with one of the following conditions and as shown in Figure J103.2:
(a) Is less than 1 foot (0.3 m) in depth and is placed on natural terrain with a slope flatter than 5 units horizontal to 1 unit vertical (20 percent slope).

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(b) Is less than 3 feet (0.9 m) in depth at its deepest point measured vertically upward from natural grade to the surface of the fill, does not exceed 50 cubic yards, and creates a fill slope no steeper than 2 units horizontal to 1 unit vertical (50 percent slope).
(c) Is less than 5 feet (1.5 m) in depth at its deepest point measured vertically upward from natural grade to the surface of the fill, does not exceed 20 cubic yards, and creates a fill slope no steeper than 2 units horizontal to 1 unit vertical (50 percent slope).

Exemption from the permit requirements of this aAppendix shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this cCode or any other laws or ordinances of this jurisdiction.

J103.3 Unpermitted grading.

A person shall not own, use, occupy, or maintain any site containing unpermitted grading. For the purposes of this Code, unpermitted grading shall be defined as either of the following:
(1) Grading that was performed, at any point in time, without the required permit(s) having first been obtained from the Building Official, pursuant to Section J103.1;
(2) Grading for which a permit was obtained pursuant to this Section, but which was not completed, pursuant to Section J105, prior to the expiration of the permit, pursuant to Section 106.5.4, or
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(3) Grading for which a permit was obtained pursuant to this Section, but where grading was performed outside the scope of the permit, pursuant to Section J105.

If the Building Official has determined that unpermitted grading was performed or has created or resulted in a hazardous condition, the Building Official shall give written notice requiring correction thereof as specified in Section 103, and in accordance with J101 of this Code.

The Building Official may require such conditions as may be reasonably necessary to prevent creation of a nuisance or hazard to public or private property.

Such conditions may include, but shall not be limited to, conditions set forth in Section J101.10.

J103.4 Availability of permit at site.

No person shall perform any grading that requires a permit under this Appendix unless a copy of the grading permit and approved grading plans are in the possession of a responsible person and available at the site for the Building Official's reference.

J103.5 Grading fees.

Fees shall be assessed in accordance with the provisions of this Section. The amount of the fees shall be as specified in Section 107.

1. Plan Review Fees. When a plan or other data are required to be submitted, a plan review fee shall be paid at the time of submitting plans and specifications for review. Separate plan review fees shall apply to retaining walls or major drainage structures as required elsewhere in this Code. For excavation and fill on the same site, the fee shall be based on the volume of excavation or fill, whichever is Enclosure A
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greater.

2. Permit Fees. A fee for each grading permit shall be paid to the Building Official at the time of issuance of the permit. Separate permits and fees shall apply to retaining walls or major drainage structures as required elsewhere in this Code.

3. Site Inspection Fee. When the Building Official finds that a visual inspection of the site is necessary to establish drainage requirements for the protection of property, existing buildings, or the proposed construction, a site inspection shall be made during plan check of grading plans. A fee for such inspection shall be paid to the Building Official at the time of submitting plans and specifications for review.

J103.6 Compliance with zoning code.

The Building Official may refuse to issue a grading permit for work on a site if either the proposed grading or the proposed land use for the site shown on the grading plan application does not comply with the provisions of Title 22 – Planning and Zoning – of the Los Angeles County Code.

J103.7 Grading security.

J103.7.1 Scope and purpose.

The Building Official may require a permittee or the owner(s) of the property on which the grading is proposed to occur to provide security as a condition of the issuance of a grading permit for any grading involving more than 1,000 cubic yards (764.6 m3).

Where unusual conditions or special hazards exist, the Building Official may require security for grading involving less than 1,000 cubic yards (764.6 m3). The purpose of the security shall be to guarantee the permittee's obligation to mitigate any hazardous Enclosure A
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conditions, including flood and geotechnical hazards, that may be created if the grading is not completed in accordance with the approved plans and specifications, and to complete any work that the Building Official determines is necessary to bring the property into compliance with this Appendix.

Security required by this Section may include incidental off-site grading on property contiguous with the site to be developed, provided written consent of the owner of such contiguous property is filed with the Building Official.

The Building Official may waive the requirements for security for the following:

1. Grading being done by or for a governmental agency.

2. Grading necessary to remove a geotechnical hazard, where such work is covered by an agreement and security is posted pursuant to the provisions of Title 21 – Subdivisions – of the Los Angeles County Code.

3. Grading on a site, not exceeding a slope of 3 units horizontal to 1 unit vertical, provided such grading as determined by the Building Official will not affect drainage from or to adjacent properties.

4. Filling of holes or depressions, provided such grading will not affect the drainage from or to adjacent properties.

J103.7.2 Form of security.

The security referred to in Section J103.7.1 shall be in one of the following forms:

1. A bond furnished by a corporate surety authorized to do business in this state.

2. Cash.

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3. Savings and loan certificates or shares deposited and assigned to the County as provided in Chapter 4.36 of Title 4 – Revenue and Finance – of the Los Angeles County Code.

4. An instrument of credit from a financial institution subject to regulation by the State or federal government and pledging that funds in the amount required by the Building Official are on deposit and guaranteed for payment, or a letter of credit is issued by such a financial institution.

J103.7.3 Amount of security.

The amount of security shall be based on the number of cubic yards of material in either excavation or fill, whichever is greater, and the cost of all drainage or other protective devices or work necessary to eliminate potential flooding and geotechnical hazards. That portion of the security valuation based on the volume of material in either excavation or fill shall be computed as follows:
100,000 cubic yards or less – 50 percent of the estimated cost of grading work.

Over 100,000 cubic yards – 50 percent of the estimated cost of the first 100,000 cubic yards plus 25 percent of the estimated cost of that portion in excess of 100,000 cubic yards.

When the rough grading has been completed in conformance with the requirements of this Code, the Building Official may, at his or her discretion, consent to a proportionate reduction of the security to an amount estimated to be adequate to ensure completion of the grading work, site development, or planting remaining to be performed. The costs referred to in this Section shall be as estimated by the Building Enclosure A
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Official.

J103.7.4 Conditions.

All security shall include conditions that the principal shall:

1. Comply with all of the provisions of this Code, applicable laws, and ordinances;

2. Comply with all of the terms and conditions of the grading permit; and

3. Complete all of the work authorized by the permit.

J103.7.5 Term of security.

The term of each security shall begin upon the filing with the Building Official, and the security shall remain in effect until the work authorized by the grading permit is completed and approved by the Building Official.

J103.7.6 Default procedures.

In the event any grading for which a permit has been issued is not completed in accordance with the approved plans and specifications for said work or with all terms and conditions of the grading permit, the Building Official may declare that a default has occurred. The Building Official shall give notice thereof to the principal and surety or financial institution executing the security, or to the owner in the case of a cash bond or assignment.

The Building Official may thereafter determine the work that is necessary to mitigate any hazardous or unsafe conditions on the site and cause such work to be performed.

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Where the security consists of a bond or instrument of credit, the surety or financial institution executing the security shall be responsible for the payment of all costs and expenses incurred by the Building Official in causing such work to be performed, up to the full amount of the security. In the case of cash security or assignment, the Building Official may pay all costs and expenses incurred in causing such work to be performed from the funds deposited and return any unused portion of such deposit or funds to the person making said deposit or assignment.

J103.7.7 Right of entry.

The Building Official or the authorized representative of any surety company or financial institution furnishing the security shall have access to the premises described in the permit for the purpose of inspecting the work.

In the event of default, as described in Section J103.7.6, the surety or financial institution furnishing the security, or the Building Official, or any person employed or engaged on the behalf of any of these parties, shall have the right to go upon the premises to perform the mitigation work, as described in Section J103.7.6.

Neither the permittee, owner, or any other person shall interfere with or obstruct the ingress into or egress from any such premises of any authorized representative of the surety or financial institution executing the security or the Building Official engaged to perform the mitigation work, as described in Section J103.7.6.

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SECTION 73. Figure J103.2 is hereby added to read as follows:

FIGURE J103.2

GRADING EXEMPTION CASES
SECTION 74. Section J104 is hereby amended to read as follows:

SECTION J104 PERMIT APPLICATION AND SUBMITTALS
J104.1 Submittal requirements.

In addition to the provisions of Section 105.3 and 1.8.4, as applicable106.4, the applicant shall state the estimated quantities of excavation and fillfollowing:

1. The estimated quantities of excavation, fill, borrow, removal, or combination thereof.

2. The proposed land use for the site on which the grading is to be performed.

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J104.2 Site plan requirements.

In addition to the provisions of Section 107106, a grading plan shall show the existing grade and finished grade in contour intervals of sufficient clarity to indicate the nature and extent of the work and show in detail that it complies with the requirements of this cCode. The plans shall show the existing grade on adjoining properties in sufficient detail to identify how grade changes will conform to the requirements of this cCode.

J104.2.1 Grading designation.

Grading in excess of 5,000 cubic yards (3,825 m3), or that is proposed to support any structure, shall be designated as "engineered grading." All engineered grading shall be performed in accordance with an approved grading plan and specifications prepared by a Civil Engineer, unless otherwise required by the Building Official.

Grading involving less than 5,000 cubic yards (3,825 m3), and that will not support any structure, shall be designated "regular grading" unless the permittee chooses to have the grading be designated as engineered grading, or the Building Official determines that, due to the existence of special conditions or unusual hazards, the grading should be designated as engineered grading.

J104.2.2 Regular grading requirements.

In addition to the provisions of Sections 106 and J104.2, an application for a regular grading permit shall be accompanied by plans of sufficient clarity to indicate the nature and extent of the work. The plans shall give the location of the work, the name of the owner, and the name of the person who prepared the plan. The plan shall Enclosure A
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include the following information:

1. General vicinity of the proposed site.

2. Limits and depths of cut and fill.

3. Location of any buildings or structures where work is to be performed, and the location of any buildings or structures within 15 feet (4.6 m) of the proposed grading.

4. Contours, flow areas, elevations, or slopes that define existing and proposed drainage patterns.

5. Storm water mitigation measures in accordance with the requirements of Section 106.4.3 of this Code. See Section J110.8 for specific requirements.

6. Location of existing and proposed utilities, drainage facilities, and recorded public and private easements and restricted use areas.

7. Location of all recorded floodways as established by Chapter 11.60 of Title 11 – Health and Safety – of the Los Angeles County Code.

8. Location of all Special Flood Hazard Areas as designated and defined in Title 44 of the Code of Federal Regulations.

J104.2.3 Engineered grading requirements.

In addition to the provisions of Sections 106 and J104.2, an application for a permit for engineered grading shall be accompanied by plans and specifications and supporting data consisting of a geotechnical report and engineering geology report.

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Specifications shall contain information covering construction and material requirements. Plans shall be drawn to scale on paper and shall be of sufficient clarity to indicate the nature and extent of the work proposed and shall show in detail that the proposed work will conform to the provisions of this Code and all relevant laws, ordinances, rules, and regulations. The first sheet of the plans shall depict the location of the proposed work, the name and address of the owner, and the name and address of the person who prepared the plans.

The plans shall include or be accompanied by the following information:

1. General vicinity of the proposed site.

2. Property limits and accurate contours of existing ground and details of terrain and area drainage.

3. Limiting dimensions, elevations, or finish contours to be achieved by the grading, proposed drainage channels, and related construction.

4. Detailed plans of all surface and subsurface drainage devices, walls, cribbing, dams, and other protective devices to be constructed with, or as a part of, the proposed work. In addition, a map showing the drainage area and the estimated runoff of the area served by any drains.

5. Location of any existing or proposed buildings or structures located on the property on which the work is to be performed and the location of any buildings or structures on adjacent properties that are within 15 feet (4.6 m) of the property or that may be affected by the proposed grading operations.

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6. Recommendations in the geotechnical report and the engineering geology report shall be incorporated into the grading plans or specifications. When approved by the Building Official, specific recommendations contained in the soils engineering report and the engineering geology report, that are applicable to grading, may be included by reference.

7. The dates of the geotechnical and engineering geology reports together with the names, addresses, and phone numbers of the firms or individuals who prepared the reports.

8. A statement of the quantities of material to be excavated and/or filled.

Earthwork quantities shall include quantities for geotechnical and geological remediation. In addition, a statement of the quantities of material to be imported or exported from the site.

9. A statement of the estimated starting and completion dates for proposed work.

10. A statement signed by the owner, acknowledging that a Design Engineer, Field Engineer, Geotechnical Engineer, and Engineering Geologist, when appropriate, will be employed to perform the services required by this Code, when the Building Official requires that such professional persons be so employed. These acknowledgments shall be on a form furnished by the Building Official.

11. Storm water mitigation measures are required to be shown on the grading plan in accordance with the requirement of Section 106.4.3 of this Code. See Section J110.8 for specific requirements.

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12. A drainage plan for those portions of property proposed to be utilized as a building site (building pad), including elevations of floors with respect to finish site grade and locations of proposed stoops, slabs, and fences that may affect drainage.

13. Location and type of any proposed private sewage disposal system, including the location of the expansion area.

14. Location of existing and proposed utilities, drainage facilities, and recorded public and private easements and restricted use areas.

15. Location of all recorded floodways as established by Chapter 11.60 of Title 11 – Health and Safety – of the Los Angeles County Code.

16. Location of all Special Flood Hazard Areas as designated and defined in Title 44 of the Code of Federal Regulations.

J104.3 Geotechnical and engineering geology reports.

A geotechnical report prepared by registered design professionals shall be provided. The report shall contain not less than the following:

1. The nature and distribution of existing soils.

2. Conclusions and recommendations for grading procedures.

3. Soil design criteria for any structures or embankments required to accomplish the proposed grading.

4. Where necessary, slope stability studies, and recommendations and conclusions regarding site geology.

The geotechnical report required by Section J104.2.3 shall include data regarding the nature, distribution, and strength of existing soils, conclusions, and Enclosure A
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recommendations for grading procedures and design criteria for corrective measures, including buttress fills, when necessary, and an opinion on the adequacy for the intended use of sites to be developed by the proposed grading as affected by geotechnical factors, including the stability of slopes. All reports shall conform with the requirements of Section 111 and shall be subject to review by the Building Official.

Supplemental reports and data may be required as the Building Official may deem necessary. Recommendations included in the reports and approved by the Building Official shall be incorporated in the grading plan or specifications.

The engineering geology report required by Section J104.2.3 shall include an adequate description of the geology of the site, conclusions, and recommendations regarding the effect of geologic conditions on the proposed development, and an opinion on the adequacy for the intended use of sites to be developed by the proposed grading, as affected by geologic factors. The engineering geology report shall include a geologic map and cross sections utilizing the most recent grading plan as a base. All reports shall conform with the requirements of Section 111 and shall be subject to review by the Building Official. Supplemental reports and data may be required as the Building Official may deem necessary. Recommendations included in the reports and approved by the Building Official shall be incorporated in the grading plan or specifications.

Exception: A geotechnical or engineering geology report is not required where the bBuilding code oOfficial determines that the nature of the work applied for is such that a report is not necessary.

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J104.4 Liquefaction study.

For sites with maximum considered earthquake spectral response accelerations at short periods (Ss) greater than 0.5g as determined by Chapter 11 of ASCE 7, a study of the liquefaction potential of the site shall be provided and the recommendations incorporated in the plans. A geotechnical investigation will be required when the proposed work is a "Project" as defined in Public Resources Code section 2693, and is located in an area designated as a "Seismic Hazard Zone" as defined in section 3722 of Title 14 of the Code of Regulations and on Seismic Hazard Zone Maps issued by the State Geologist under Public Resources Code section 2696.

Exception: A liquefaction study is not required where the bBuilding oOfficial determines from established local data that the liquefaction potential is low.

SECTION 75. Section J105 is hereby amended to read as follows:

SECTION J105 INSPECTIONS
J105.1 General.

Grading Iinspections shall be governed by Section 110, Chapter 1, Division II108 and as indicated herein. Grading operations for which a permit is required shall be subject to inspection by the Building Official. In addition, professional inspection of grading operations shall be performed by the Field Engineer, the Geotechnical Engineer, and the Engineering Geologist retained to provide such services in accordance with this Section for engineered grading and as required by the Building Official for regular grading.

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J105.2 Special and supplemental inspections.

The special inspection requirements of Section 1705.6 shall apply to work performed under a grading permit where required by the bBuilding oOfficial. In addition to the called inspections specified in Section J105.7, the Building Official may make such other inspections as may be deemed necessary to determine that the work is being performed in conformance with the requirements of this Code. The Building Official may require investigations and reports by an approved soil testing agency, Geotechnical Engineer and/or Engineering Geologist, and Field Engineer. Inspection reports shall be provided when requested in writing by the Building Official.

The Building Official may require continuous inspection of drainage devices by the Field Engineer in accordance with this Section when the Building Official determines that the drainage devices are necessary for the protection of the structures in accordance with Section 110.

J105.3 Field engineer.

The Field Engineer shall provide professional inspection of those parts of the grading project within such engineer's area of technical specialty, oversee and coordinate all field surveys, including setting grade stakes, and provide site inspections during grading operations to ensure the site is graded in accordance with the approved grading plan and the appropriate requirements of this Code. During site grading, and at the completion of both rough grading and final grading, the Field Engineer shall submit statements and reports as required by Sections J105.11 and J105.12. If revised grading plans are required during the course of the work, they shall be prepared by a Enclosure A
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Civil Engineer and approved by the Building Official.

J105.4 Geotechnical engineer.

The Geotechnical Engineer shall provide professional inspection of those parts of the grading project within such engineer's area of technical specialty, which shall include observation during grading and testing for required compaction. The Geotechnical Engineer shall provide sufficient observation during the preparation of the natural ground and placement and compaction of the fill to verify that such work is being performed in accordance with the conditions of the approved plan and the appropriate requirements of this Appendix. If conditions differing from the approved geotechnical engineering and engineering geology reports are encountered during grading, the Geotechnical Engineer shall provide revised recommendations to the permittee, the Building Official, and the Field Engineer.

J105.5 Engineering geologist.

The Engineering Geologist shall provide professional inspection of those parts of the grading project within such engineer's area of technical specialty, which shall include professional inspection of the bedrock excavation to determine if conditions encountered are in conformance with the approved report. If conditions differing from the approved engineering geology report are encountered, the Engineering Geologist shall provide revised recommendations to the Geotechnical Engineer.

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J105.6 Permittee.

The permittee shall be responsible for ensuring that the grading is performed in accordance with the approved plans and specifications and in conformance with the provisions of this Code. The permittee shall engage project consultants, if required under the provisions of this Code, to provide professional inspections on a timely basis.

The permittee shall act as a coordinator between the project consultants, the contractor, and the Building Official. In the event of changed conditions, the permittee shall be responsible for informing the Building Official of such change and shall provide revised plans for approval.

J105.7 Required inspections.

The permittee shall call for and schedule an inspection by the Building Official at the following various stages of work and shall obtain the approval of the Building Official prior to proceeding to the next stage of work:

Pre-grade – Before any construction or grading activities occur at the site. The permittee shall ensure that all project consultants are present at the pre-grade inspection.

Initial grade – When the site has been cleared of vegetation and unapproved fill, and has been scarified, benched, or otherwise prepared for fill. No fill shall have been placed prior to this inspection.

Rough grade – When approximate final elevations have been established, drainage terraces, swales, and other drainage devices necessary for the protection of the building sites from flooding have been installed, berms have been installed at the Enclosure A
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top of the slopes, and the statements required by Section J105.12 have been received.

Final grade – When grading has been completed, all drainage devices necessary to drain the building pad have been installed, slope planting has been established, irrigation systems have been installed, and the as-built plans and required statements and reports have been submitted.

J105.8 Notification of noncompliance.

If, in the course of fulfilling their respective duties under this Appendix, the Field Engineer, the Geotechnical Engineer, or the Engineering Geologist determines that the work is not being done in conformance with this Appendix or the approved grading plans, the Field Engineer, the Geotechnical Engineer, or the Engineering Geologist shall immediately report, in writing, the discrepancies and the recommended corrective measures to the permittee and to the Building Official.

J105.9 Transfer of responsibility.

If the Field Engineer, the Geotechnical Engineer, or the Engineering Geologist of record is changed at any time after the grading plans required pursuant to Section J104.2.2 or J104.2.3 have been approved by the Building Official, the permittee shall immediately provide written notice of such change to the Building Official. The Building Official may stop the grading from commencing or continuing until the permittee has identified a replacement and the replacement has agreed in writing to assume responsibility for those parts of the grading project that are within the replacement's area of technical competence.

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J105.10 Non-inspected grading.

No person shall own, use, occupy, or maintain any non-inspected grading. For the purposes of this Code, non-inspected grading shall be defined as any grading for which a grading permit was first obtained, pursuant to Section J103, above, but which has progressed beyond any point requiring inspection and approval by the Building Official without such inspection and approval having been obtained.

J105.11 Routine field inspections and reports.

Unless otherwise directed by the Building Official, the Field Engineer for all engineered grading projects shall prepare routine inspection reports and shall file these reports with the Building Official as follows:

1. Bi-weekly during all times when grading of 400 cubic yards or more per week is occurring on the site;

2. Monthly, at all other times; and

3. At any time when requested in writing by the Building Official.

Such reports shall certify to the Building Official that the Field Engineer has inspected the grading site and related activities and has found them in compliance with the approved grading plans and specifications, this Code, all grading permit conditions, and all other applicable ordinances and requirements. The reports shall conform to a standard "Report of Grading Activities" form, which shall be provided by the Building Official.

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J105.12 Completion of work.

Upon completion of the rough grading work and at the final completion of the work, the following reports and drawings and supplements thereto are required for engineered grading or when professional inspection is otherwise required by the Building Official:

1. An "as-built" grading plan prepared by the Field Engineer retained to provide such services in accordance with Section J105.3 showing all plan revisions as approved by the Building Official. This shall include original ground surface elevations, as-built ground surface elevations, lot drainage patterns, and the locations and elevations of surface drainage facilities and the outlets of subsurface drains. As-built locations, elevations, and details of subsurface drains shall be shown as reported by the Geotechnical Engineer.

The as-built grading plan shall be accompanied by a certification by the Field Engineer that to the best of his or her knowledge, the work within the Field Engineer's area of responsibility was done in accordance with the final approved grading plan.

2. A report prepared by the Geotechnical Engineer retained to provide such services in accordance with Section J105.4, including locations and elevations of field density tests, summaries of field and laboratory tests, other substantiating data, and comments on any changes made during grading and their effect on the recommendations made in the approved geotechnical engineering investigation report.

The report shall include a certification by the Geotechnical Engineer that, to the best of his or her knowledge, the work within the Geotechnical Engineer's area of responsibility Enclosure A
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is in accordance with the approved geotechnical engineering report and applicable provisions of this Appendix. The report shall contain a finding regarding the safety of the completed grading and any proposed structures against hazard from landslide, settlement, or slippage.

3. A report prepared by the Engineering Geologist retained to provide such services in accordance with Section J105.5, including a final description of the geology of the site and any new information disclosed during the grading and the effect of such new information, if any, on the recommendations incorporated in the approved grading plan. The report shall contain a certification by the Engineering Geologist that, to the best of his or her knowledge, the work within the Engineering Geologist's area of responsibility is in accordance with the approved engineering geology report and applicable provisions of this Appendix. The report shall contain a finding regarding the safety of the completed grading and any proposed structures against hazard from landslide, settlement, or slippage. The report shall contain a final as-built geologic map and cross-sections depicting all the information collected prior to and during grading.

4. The grading contractor shall certify, on a form prescribed by the Building Official, that the grading conforms to said as-built plan and the approved specifications.

5. When a landscape permit is required by Section 490.1 of the California Department of Water Resources Model Water Efficient Landscape Ordinance, the Landscape Architect shall certify on a form prescribed by the Building Official that the landscaping conforms to approved landscape plans and specifications.

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J105.13 Notification of completion.

The permittee shall notify the Building Official when the grading operation is ready for final inspection. Final approval shall not be given until all work, including installation of all drainage facilities and their protective devices, and all erosion-control measures, have been completed in accordance with the final approved grading plan, and all required reports have been submitted and approved.

J105.14 Change of ownership.

Unless otherwise required by the Building Official, when a grading permit has been issued on a site and the owner sells the property prior to final grading approval, the new property owner shall be required to obtain a new grading permit.

SECTION 76. Section J106.1 is hereby amended to read as follows:

J106.1 Maximum cut slope.

The slope of cut surfaces shall be not steeper than is safe for the intended use, and shall be not more than one unit vertical in two units horizontal (50-percent slope) unless the owner or the owner's authorized agent furnishes a geotechnical or an engineering geology report, or both, justifying a steeper slope. The reports must contain a statement by the Geotechnical Engineer or Engineering Geologist that the site was investigated and an opinion that a steeper slope will be stable and will not create a hazard to public or private property, in conformance with the requirements of Section 111. The Building Official may require the slope of the cut surfaces to be flatter in slope than 2 units horizontal to 1 unit vertical (50-percent slope) if the Building Official finds it necessary for the stability and safety of the slope.

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Exceptions:

1. A cut surface shall be permitted to be at a slope of 1.5 units horizontal to one unit vertical (67-percent slope) provided that all of the following are met:

1.1. It is not intended to support structures or surcharges.

1.2. It is adequately protected against erosion.

1.3. It is no more than 8 feet (2438 mm) in height.

1.4. It is approved by the bBuilding code oOfficial.

1.5. Ground water is not encountered.

2. A cut surface in bedrock shall be permitted to be at a slope of 1 unit horizontal to 1 unit vertical (100 percent slope).

SECTION 77. Section J107 is hereby amended to read as follows:

SECTION J107 FILLS
J107.1 General.

Unless otherwise recommended in the geotechnical report, fills shall comply with the provisions of this sSection.

Exception: The Building Official may permit a deviation from the provisions of this Appendix for minor fills not intended to support structures, where no geotechnical report has been prepared.

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J107.2 Surface Preparation.

Fill slopes shall not be constructed on natural slopes steeper than 2 units horizontal to 1 unit vertical (50 percent slope). The ground surface shall be prepared to receive fill by removing vegetation, topsoil, and other unsuitable materials (including any existing fill that does not meet the requirements of this Appendix), and scarifying the ground to provide a bond with the fill material.

Subdrains shall be provided under all fills placed in natural drainage courses and in other locations where seepage is evident, except where the Geotechnical Engineer or Engineering Geologist recommends otherwise. Such sub-drainage systems shall be of a material and design approved by the Geotechnical Engineer and acceptable to the Building Official. The Geotechnical Engineer shall provide continuous inspection during the process of subdrain installations. The location of the subdrains shall be shown on a plan prepared by the Geotechnical Engineer. Excavations for the subdrains shall be inspected by the Engineering Geologist when such subdrains are included in the recommendations of the Engineering Geologist.

J107.3 Benching.

Where existing grade is at a slope steeper than one unit vertical in five units horizontal (20-percent slope) and the depth of the fill exceeds 5 feet (1524 mm), benching shall be provided into sound bedrock or other competent material as determined by the Geotechnical Engineer in accordance with Figure J107.3, or as determined by the Geotechnical Engineer. When fill is to be placed over a cut, Aa key shall be provided that is not less than 10 feet (3048 mm) in width and 2 feet (610 mm) in Enclosure A
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depth. The area beyond the toe of fill shall be sloped for sheet overflow or a paved drain shall be constructed thereon. The Geotechnical Engineer or Engineering Geologist, or both, shall inspect and approve the cut as being suitable for the foundation and placement of fill material before any fill material is placed on the excavation. . . .

J107.4 Fill material.

Fill material shall not include organic, frozen, or other deleterious materials.

Rock or similar irreducible material greater than 12 inches (305 mm) in any dimension shall not be included in fills.

Exception: The Building Official may permit placement of larger rock when the Geotechnical Engineer properly devises and recommends a method of placement, and continuously inspects the placement and approves the fill stability. The following requirements shall also apply:

1. Prior to issuance of the grading permit, potential rock disposal areas shall be delineated on the grading plan.

2. Rock sizes greater than 12 inches (0.3 m) in maximum dimension shall be 10 feet (3.0 m) or more below grade, measured vertically.

3. Rocks shall be placed so as to assure filling of all voids with well-graded soil.

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4. The reports submitted by the Geotechnical Engineer shall acknowledge the placement of the oversized material and whether the work was performed in accordance with the engineer's recommendations and the approved plans.

5. The location of oversized rock dispersal areas shall be shown on the asbuilt plan.

J107.5 Compaction.

All fill material shall be compacted to a minimum of 90 percent of maximum density as determined by ASTM D1557, Modified Proctor, in lifts not exceeding 12 inches (305 mm) in depth within 40 feet (12.2 m) below finished grade and 93 percent of maximum dry density deeper than 40 feet (12.2 m) below finished grade, unless a lower relative compaction (not less than 90 percent of maximum dry density) is justified by the Geotechnical Engineer and approved by the Building Official. Where ASTM D1557, Modified Proctor, is not applicable, a test acceptable to the Building Official shall be used.

Field density shall be determined by a method acceptable to the Building Official.

However, not less than ten percent of the required density tests, uniformly distributed, shall be obtained by the Sand Cone Method.

Fill slopes steeper than 2 units horizontal to 1 unit vertical (50-percent slope) shall be constructed by the placement of soil a sufficient distance beyond the proposed finish slope to allow compaction equipment to operate at the outer surface limits of the final slope surface. The excess fill is to be removed prior to completion or rough grading. Other construction procedures may be utilized when it is first shown to the Enclosure A
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satisfaction of the Building Official that the angle of slope, construction method, and other factors will comply with the intent of this Section.

J107.6 Maximum slope.

The slope of fill surfaces shall be not steeper than is safe for the intended use.

Fill slopes steeper than one unit vertical in two units horizontal (50-percent slope) shall be justified by a geotechnical reports or engineering dataconforming to the requirements of Section 111, containing a statement by the Geotechnical Engineer that the site has been investigated and an opinion that a steeper fill slope will be stable and will not create a hazard to public or private property. Substantiating calculations and supporting data may be required where the Building Official determines that such information is necessary to verify the stability and safety of the proposed slope. The Building Official may require the fill slope to be constructed with a face flatter in slope than 2 units horizontal to 1 unit vertical (50-percent slope) if the Building Official finds it necessary for stability and safety of the slope.

J107.7 Slopes to receive fill.

Where fill is to be placed above the top of an existing slope steeper than 3 units horizontal to 1 unit vertical (33-percent slope), the toe of the fill shall be set back from the top edge of the existing slope a minimum distance of 6 feet (1.8 m) measured horizontally or such other distance as may be specifically recommended by a Geotechnical Engineer or Engineering Geologist and approved by the Building Official.

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J107.8 Inspection of fill.

For engineered grading, the Geotechnical Engineer shall provide sufficient inspections during the preparation of the natural ground and the placement and compaction of the fill to ensure that the work is performed in accordance with the conditions of plan approval and the appropriate requirements of this Appendix. In addition to the above, the Geotechnical Engineer shall provide continuous inspection during the entire fill placement and compaction of fills that will exceed a vertical height or depth of 30 feet (9.1 m) or result in a slope surface steeper than 2 units horizontal to 1 unit vertical (50-percent slope).

J107.9 Testing of fills.

Sufficient tests of the fill soils shall be made to determine the density and to verify compliance of the soil properties with the design requirements. This includes soil types and shear strengths in accordance with Section J111 Referenced Standards.

SECTION 78. Section J108 is hereby amended to read as follows:

SECTION J108 SETBACKS
J108.1 General.

Cut and fill slopes shall be set back from the property lines in accordance with this sSection. Setback dimensions shall be measured perpendicular to the property line and shall be as shown in Figure J108.1, unless substantiating data is submitted justifying reduced setbacks, and reduced setbacks are recommended in a geotechnical engineering and engineering geology report approved by the Building Official.

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J108.2 Top of slope
The setback at the top of a cut slope shall be not less than that shown in Figure J108.1, or than is required to accommodate any required interceptor drains, whichever is greater. For graded slopes, the property line between adjacent lots shall be at the apex of the berm at the top of the slope. Property lines between adjacent lots shall not be located on a graded slope steeper than 5 units horizontal to 1 unit vertical (20-percent slope).

J108.3 Toe of fill Sslope protection.

The setback from the toe of a fill slope shall not be less than that shown by Figure J108.1. Where required to protect adjacent properties at the toe of a slope from adverse effects of the grading, additional protection, approved by the bBuilding oOfficial, shall be included. Examples of such protection may include but shall not be limited to:

1. Setbacks greater than those required by Figure J108.1.

2. Provisions for retaining walls or similar construction.

3. Erosion protection of the fill slopes.

4. Provision for the control of surface waters.

J108.4 Alternate setbacks.

The Building Official may approve alternate setbacks if he or she determines that no hazard to life or property will be created or increased. The Building Official may require an investigation and recommendation by a qualified engineer or Engineering Geologist to justify any proposed alternate setback.

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SECTION 79. Figure J108.1 is hereby amended to read as follows:

FIGURE J108.1

DRAINAGESETBACK DIMENSIONS
SECTION 80. Section J109 is hereby amended to read as follows:

SECTION J109 DRAINAGE AND TERRACING
J109.1 General.

Unless otherwise recommended by a registered design professionallicensed Civil Engineer and approved by the Building Official, drainage facilities and terracing shall be provided in accordance with the requirements of this sSection J109.2 for all cut and fill slopes 3 units horizontal to 1 unit vertical (33-percent slope) and steeper.

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EXCEPTION: Drainage facilities and terracing need not be provided where the ground slope is not steeper than one unit vertical in three units horizontal (33-percent slope).

For slopes flatter than 3 units horizontal to 1 unit vertical (33-percent slope) and steeper than 5 units horizontal to 1 unit vertical (20-percent slope), a paved swale or ditch shall be installed at 30-foot (9.1 m) vertical intervals to control surface drainage and debris. Swales shall be sized based on contributory area and have adequate capacity to convey intercepted waters to the point of disposal as defined in Section J109.5. Swales must be paved with reinforced concrete not less than 3 inches (0.08 m) in thickness, reinforced with 6-inch (0.2 m) by 6-inch (0.2 m) No. 10 by No. 10 welded wire fabric or equivalent reinforcing centered in the concrete slab or an equivalent approved by the Building Official. Swales must have a minimum flow line depth of 1 foot (0.3 m) and a minimum paved width of 18 inches (0.5 m). Swales shall have a minimum gradient of not less than 5 percent. There shall be no reduction in grade along the direction of flow unless the velocity of flow is such that slope debris will remain in suspension on the reduced grade.

J109.2 Drainage Tterraces.

Drainage Tterraces not less than 6 feet (1829 mm)8 feet (2.4 m) in width shall be established at not more than 30-foot (9144 mm) vertical intervals on all cut or fill slopes to control surface drainage and debris. Suitable access shall be provided to allow for cleaning and maintenance.

Where more than two terraces are required, one terrace, located at Enclosure A
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approximately mid-height, shall be at least 12 feet (3658 mm) in width.

Swales or ditches shall be provided on terraces. They shall have a minimum gradient of one unit vertical in 20 units horizontal (5-percent slope) and shall be paved with concrete not less than 3 inches (76 mm) in thickness, or with other materials suitable to the application. They shall have a depth not less than 12 inches (305 mm) and a width not less than 5 feet (1524 mm).

A single run of swale or ditch shall not collect runoff from a tributary area exceeding 13,500 square feet (1256 m2) (projected) without discharging into a down drainWhen only one terrace is required, it shall be at mid-height. For cut or fill slopes greater than 100 feet (30.5 m) and up to 120 feet (36.6 m) in vertical height, one terrace at approximately mid-height shall be 20 feet (6.1 m) in width. Terrace widths and spacing for cut and fill slopes greater than 120 feet (36.6 m) in height shall be designed by the Civil Engineer and approved by the Building Official. Suitable access shall be provided to permit proper cleaning and maintenance.

Drainage swales on terraces shall have a longitudinal grade of not less than 5 percent nor more than 12 percent and a minimum depth of 1 foot (0.3 m) at the flow line. There shall be no reduction in grade along the direction of flow unless the velocity of flow is such that slope debris will remain in suspension on the reduced grade.

Drainage swales must be paved with reinforced concrete not less than 3 inches (0.8 m) in thickness, reinforced with 6-inch (0.2 m) by 6-inch (0.2 m) No. 10 by No. 10 welded wire fabric or equivalent reinforcing centered in the concrete slab or an approved equal paving. Drainage swales shall have a minimum depth at the deepest point of 1 foot Enclosure A
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(0.3 m) and a minimum paved width of 5 feet (1.5 m). Drainage swales on terraces shall be sized based on contributory area and have adequate capacity to convey intercepted waters to the point of disposal as defined in Section J109.5. Downdrains or drainage outlets shall be provided at approximately 300 foot (91.4 m) intervals along the drainage terrace or at equivalent locations. Down drains and drainage outlets shall be of approved materials and of adequate capacity to convey the intercepted waters to the point of disposal as defined in Section J109.5.

J109.3 Interceptor drains and overflow protection.

Berms, Iinterceptor drains, swales, or other devices shall be installed along the top of cut slopes receiving drainage from a tributary width greater than 40 feet (12 192 mm), measured horizontallyto prevent surface waters from overflowing onto and damaging the face of a slope. Berms used for slope protection shall not be less than 12 inches (0.3 m) above the level of the pad and shall slope back at least 4 feet (1.2 m) from the top of the slope.

Interceptor drains shall be installed along the top of graded slopes greater than 5 feet in height receiving drainage from a slope with a tributary width greater than 30 feet (9.1 m), measured horizontally. They shall have a minimum depth of 1 foot (305 mm) and a minimum width of 3 feet (915 mm). The slope shall be approved by the bBuilding oOfficial, but shall be not less than one unit vertical in 50 units horizontal (2- percent slope). The drain shall be paved with concrete not less than 3 inches (76mm) in thickness, or by other materials suitable to the application, and reinforced as required for drainage terraces. Discharge from the drain shall be accomplished in a manner to Enclosure A
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prevent erosion and shall be approved by the bBuilding oOfficial. . . .

J109.5 Disposal.

All drainage facilities shall be designed to convey waters to the nearestpracticable street, storm drain, or natural watercourse or drainage way approved by the Building Official or other appropriate governmental agency, provided that the discharge of such waters at that location will not create or increase a hazard to life or property.

Erosion of the ground in the area of discharge shall be prevented by installation of nonerosive down drains or other devices. Desilting basins, filter barriers, or other methods, as approved by the Building Official, shall be utilized to remove sediments from surface waters before such waters are allowed to enter streets, storm drains, or natural watercourses. If the drainage device discharges onto natural ground, riprap or a similar energy dissipator may be required.

Building pads shall have a minimum drainage gradient of 2 percent toward an approved drainage facility or a public street unless otherwise directed by the Building Official. A lesser slope may be approved by the Building Official for sites graded in relatively flat terrain, or where special drainage provisions are made, when the Building Official finds such modification will not result in a hazard to life or property.

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SECTION 81. Section J110 is hereby amended to read as follows:

SECTION J110 SLOPE PLANTING AND EROSION CONTROL
J110.1 General.

The faces of cut and fill slopes shall be prepared and maintained to control erosion. This control shall be permitted to consist of effective planting, erosion control blankets, soil stabilizers, or other means as approved by the Building Official.

Exception: Erosion control measures need not be provided on cut slopes not subject to erosion due to the erosion-resistant character of the materials, as approved by the Project Consultants to the satisfaction of the Building Official. . . .

J110.3 Planting.

The surface of all cut slopes more than 5 feet (1.5 m) in height and fill slopes more than 3 feet (0.9 m) in height shall be protected against damage from erosion by planting with grass or ground cover plants. Slopes exceeding 15 feet (4.6 m) in vertical height shall also be planted with shrubs, spaced at not to exceed 10 feet (3 m) on center, or trees, spaced at not to exceed 20 feet (6.1 m) on center; or a combination of shrubs and trees at an equivalent spacing, in addition to grass or ground cover plants.

The plants selected and planting methods used shall be suitable for the soil and climatic conditions of the site.

Plant material shall be selected that will produce a coverage of permanent planting to effectively control erosion. Consideration shall be given to deep-rooted plant material needing limited watering, maintenance, high root to shoot ratio, wind Enclosure A
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susceptibility, and fire-retardant characteristics. All plant materials must be approved by the Building Official.

Planting may be modified for the site if specific recommendations are provided by both the Geotechnical Engineer and a Landscape Architect. Specific recommendations must consider soils and climatic conditions, irrigation requirements, planting methods, fire-retardant characteristics, water efficiency, maintenance needs, and other regulatory requirements. Recommendations must include a finding that the alternative planting will provide a permanent and effective method of erosion control. Modifications to planting must be approved by the Building Official prior to installation.

J110.4 Irrigation.

Slopes required to be planted by Section J110.3 shall be provided with an approved system of irrigation that is designed to cover all portions of the slope.

Irrigation system plans shall be submitted to and approved by the Building Official prior to installation. A functional test of the system may be required.

For slopes less than 20 feet (6.1 m) in vertical height, hose bibs to permit hand watering will be acceptable if such hose bibs are installed at conveniently accessible locations where a hose no longer than 50 feet (15.2 m) is necessary for irrigation.

Irrigation requirements may be modified for the site if specific recommendations are provided by both the Geotechnical Engineer and a Landscape Architect. Specific recommendations must consider soils and climatic conditions, plant types, planting methods, fire-retardant characteristics, water efficiency, maintenance needs, and other regulatory requirements. Recommendations must include a finding that the alternative Enclosure A
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irrigation method will sustain the proposed planting and provide a permanent and effective method of erosion control. Modifications for irrigation systems must be approved by the Building Official prior to installation.

J110.5 Plans and specifications.

Planting and irrigation plans shall be submitted for slopes that are required to be planted and irrigated pursuant to Sections J110.3 and J110.4. Except as otherwise required by the Building Official for minor grading, the plans for slopes 20 feet (6.1 m) or more in vertical height shall be prepared and signed by a Civil Engineer or Landscape Architect. If requested by the Building Official, planting and irrigation details shall be included on the grading plan.

J110.6 Rodent control.

Fill slopes shall be protected from potential slope damage by a preventative program of rodent control.

J110.7 Release of security.

The planting and irrigation systems required by this Section shall be installed as soon as practical after rough grading. Prior to final approval of grading and before the release of the grading security, the planting shall be well established and growing on the slopes, and there shall be evidence of an effective rodent control program.

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J110.8 National Pollutant Discharge Elimination System
(NPDES) compliance.

J110.8.1 General.

All grading plans and permits and the owner of any property on which such grading is performed shall comply with the provisions of this Section for NPDES compliance.

All best management practices shall be installed before grading begins or as instructed in writing by the Building Official for unpermitted grading as defined by Section J103.3. As grading progresses, all best management practices shall be updated as necessary to prevent erosion and to control construction-related pollutants from discharging from the site. All best management practices shall be maintained in good working order to the satisfaction of the Building Official until final grading approval has been granted by the Building Official and all permanent drainage and erosion control systems, if required, are in place. Failure to comply with this Section is subject to "Noncompliance Penalties" pursuant to Section J110.8.5. Payment of a penalty shall not relieve any persons from fully complying with the requirements of this Code in the execution of the work.

J110.8.2 Storm Water Pollution Prevention Plan (SWPPP).

The Building Official may require a SWPPP. The SWPPP shall contain details of best management practices, including desilting basins or other temporary drainage or control measures, or both, as may be necessary to control construction-related pollutants that originate from the site as a result of construction-related activities. When Enclosure A
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the Building Official requires a SWPPP, no grading permit shall be issued until the SWPPP has been submitted to and approved by the Building Official.

For unpermitted grading as defined by Section J103.3, upon written request, a SWPPP in compliance with the provisions of this Section and Section 106.4.3 for NPDES compliance shall be submitted to the Building Official. Failure to comply with this Section is subject to "Noncompliance Penalties" per Section J110.8.5. Payment of a penalty shall not relieve any persons from fully complying with the requirements of this Code in the execution of the work.

J110.8.3 Erosion and Sediment Control Plans (ESCP).

Where a grading permit is issued and the Building Official determines that the grading will not be completed prior to November 1, the owner of the site on which the grading is being performed shall, on or before October 1, file or cause to be filed with the Building Official an ESCP. The ESCP shall include specific best management practices to minimize the transport of sediment and protect public and private property from the effects of erosion, flooding, or the deposition of mud, debris, or constructionrelated pollutants. The best management practices shown on the ESCP shall be installed on or before October 15. The plans shall be revised annually or as required by the Building Official to reflect the current site conditions.

The ESCP shall be accompanied by an application for plan checking services and plan-checking fees in an amount determined by the Building Official, up to but not exceeding 10 percent of the original grading permit fee.

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Failure to comply with this Section is subject to "Noncompliance Penalties" pursuant to Section J110.8.5. Payment of a penalty shall not relieve any persons from fully complying with the requirements of this Code in the execution of the work.

J110.8.4 Storm Water Pollution Prevention Plan (SWPPP), effect of noncompliance.

Should the owner fail to submit the SWPPP or the ESCP as required by Section J110.8, or fail to install the best management practices, it shall be deemed that a default has occurred under the conditions of the grading permit security. The Building Official may thereafter enter the property for the purpose of installing, by County forces or by other means, the drainage, erosion control, and other devices shown on the approved plans, or if there are no approved plans, as the Building Official may deem necessary to protect adjoining property from the effects of erosion, flooding, or the deposition of mud, debris, or constructed-related pollutants.

The Building Official shall also have the authority to impose and collect the penalties imposed by Section J110.8.5. Payment of a penalty shall not relieve any persons from fully complying with the requirements of this Code in the execution of the work.

J110.8.5 Noncompliance penalties.

The amount of the penalties shall be as follows:

1. If a SWPPP or an ESCP is not submitted as prescribed in Sections J110.8.2 and J110.8.3:

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Grading Permit Volume Penalty
1-10,000 cubic yards (1-7645.5 m3) $50.00 per day
10,001-100,000 cubic yards (7646.3-76455 m3) $250.00 per day More than 100,000 cubic yards (76455 m3) $500.00 per day

2. If the best management practices for storm water pollution prevention and wet weather erosion control, as approved by the Building Official, are not installed as prescribed in this Section J110.8:

Grading Permit Volume Penalty
1-10,000 cubic yards (1-7645.5 m3) $100.00 per day
10,001-100,000 cubic yards (7646.3-76455 m3) $250.00 per day More than 100,000 cubic yards (76455 m3) $500.00 per day NOTE: See Section 108 for inspection request requirements.

SECTION 82. Section J111 is hereby amended to read as follows:

SECTION J111 REFERENCED STANDARDS
J111.1 General. See Table J111.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

TABLE J111.1 – REFERENCED STANDARDS
ASTM D1557-12E1 Test Method for Laboratory Compaction
Characteristics of Soil Using Modified Effort
[56,000 ft-lb/ft3 (2,700kN-m/m3)].

J 107.5
ASCE/SEI 7-22 Minimum Design Loads and Associated Criteria for Buildings and Other Structures
J104.4
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These regulations establish minimum standards and are not intended to prevent the use of alternate materials, methods, or means of conforming to such standards, provided such alternate has been approved by the Building Official.

The Building Official shall approve such an alternate provided they determine that the alternate is, for the purpose intended, at least the equivalent of that prescribed in this Code in quality, strength, effectiveness, durability, and safety.

The Building Official shall require that sufficient evidence or proof be submitted to substantiate any claims regarding the alternate.

The standards listed below are recognized standards. Compliance with these recognized standards shall be prima facie evidence of compliance with the standards set forth in Sections J104 and J107.

ASTM D 1557
– Latest
Revision
Laboratory Characteristics Compaction of Soil Using
Modified Effort J107.5
ASTM D 1556
– Latest
Revision
Density and Unit Weight of Soils In Place by the
Sand Cone Method
J104.2.3,
J104.3 and
J107.9
ASTM D 2167
– Latest
Revision
Density and Unit Weight of Soils In Place by the
Rubber Balloon Method
J104.2.3
J104.3 and
J107.9
ASTM D 2937
– Latest
Revision
Density of Soils in Place by the Drive Cylinder
Method
J104.2.3
J104.3 and
J107.9
ASTM D 2922
– Latest
Revision
Density of Soil and Soil Aggregate In Place by
Nuclear Methods
J104.2.3
J104.3 and
J107.9
ASTM D 3017
– Latest
Revision
Water Content of Soil and Rock in Place by
Nuclear Methods
J104.2.3,
J104.3 and
J107.9
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SECTION 83. Section Q101.1 is hereby amended to read as follows:

Q101.1 Scope.

This appendix shall be applicableapplies to emergency housing and emergency housing facilities, as defined in Section Q102, when and to the extent that the County of Los Angeles Board of Supervisors ("Board") finds, by motion, resolution, or otherwise, that this appendix applies to a specific state of emergency, local emergency, or declaration of shelter crisis.

SECTION 84. Section Q102.1 is hereby amended to read as follows:

Q102.1 General.
. . .

ENFORCING AGENCY. The Building Official as defined in Section 104.3 of this Code.
. . .

SECTION 85. Section Q103.1 is hereby amended to read as follows:

Q103.1 General.

Emergency sleeping cabins, emergency transportable housing units, membrane structures and tents constructed and/or assembled in accordance with this appendix, shall be occupied only during the duration of the declaration of state of emergency, local emergency, or shelter crisis.
. . .

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SECTION 86. Section Q103.4 is hereby amended to read as follows:

Q103.4 Fire and life safety requirements not addressed in this appendix.

If not otherwise addressed in this appendix, fire and life safety measures, including, but not limited to, means of egress, fire separation, fire sprinklers, smoke alarms, and carbon monoxide alarms, shall be determined and enforced by the enforcing agency in consultation with the County Departments of Public Health, Fire, and other pertinent County departments, as applicable.

SECTION 87. Section Q106.1 is hereby amended to read as follows:

Q106.1 General.
. . .

Tents and membrane structures shall be provided with means of ventilation (natural and/or mechanical) allowing for adequate air replacement, as determined by the enforcing agency.

SECTION 88. Section Q107.1 is hereby amended to read as follows:

Q107.1 General.

Emergency housing shall comply with the applicable requirements in Chapter 11B and/or the US Access Board Final Guidelines for Emergency Transportable Housing as determined by the enforcing agency. . . .

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SECTION 89. Section Q110.1.1 is hereby added to read as follows:

Q110.1.1 Backflow prevention.

Backflow prevention devices shall be provided in accordance with Section 602.3 of the Plumbing Code.

SECTION 90. Section Q110.1.2 is hereby added to read as follows:

Q110.1.2 Drinking fountains.

An adequate number of drinking fountains, bottle fillers, or drinking facilities shall be provided as determined by the enforcing agency.

SECTION 91 Section Q110.3 is hereby amended to read as follows:

Q110.3 Toilet and bathing facilities.
. . .

The maximum travel distance from any sleeping and/or living area to the toilet facility shall not exceed 300 feet (91.4 m) or as determined by the enforcing agency.

SECTION 92. The provisions of this ordinance contain various changes, modifications, and additions to the 2025 California Building Code. Some of those changes are administrative in nature in that they do not constitute changes or modifications to requirements contained in the building standards published in the California Building Standards Code.

Pursuant to California Health and Safety Code sections 17958.5, 17958.7, and 18941.5, the Board of Supervisors hereby expressly finds that all of the changes and modifications to requirements contained in the building standards published in the California Building Standards Code that are contained in this ordinance are reasonably Enclosure A
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necessary because of local climatic, geological, or topographical conditions in the County of Los Angeles due to the potential for seismic activity in the region, topographical conditions that contribute to the spread of wild fires, and climatic conditions that impact air quality and increase the risk of wild fires. In addition, the Board of Supervisors expressly finds that these changes and modifications are substantially equivalent to changes or modifications previously filed with the California Building Standards Commission by the County of Los Angeles and which were in effect as of September 30, 2025, or relate to home hardening. Without limiting the foregoing, the County makes additional findings herein:

BUILDING CODE AMENDMENTS
Code
Section
Condition Explanation of Amendment
113.5,
113.5.1,
113.5.2
Administrative This is an administrative amendment to clarify that structures meeting the conditions specified and
affected by the 2025 Eaton and Palisades fire are not
required under the Alquist-Priolo Act to conduct an
active fault study.
701A.1
701A.2
Climatic Clarifies the application of Chapter 5 of the California Wildland Interface Code to harden additions,
alterations, and/or relocated buildings. Many areas of
the County have been designated as Fire Hazard
Severity Zones due to the increased risk of fire
caused by low humidity, strong winds, and dry
vegetation. Additions, alterations, and/or relocated
buildings have the same fire risk as new buildings.
701A.3
701A.5
701A.6
Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in the County caused
by low humidity, strong winds, and dry vegetation in
high fire severity zones in order to further harden
residential buildings against fire risk.
701A.7 Climatic Disallows the use of Class B wood-shingle/woodshake roofs due to the increased risk of fire in the County caused by low humidity, strong winds, and dry
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Code
Section
Condition Explanation of Amendment
vegetation in high fire severity zones in order to
further harden residential buildings against fire risk. 1031.2.1 Geological The greater Los Angeles/Long Beach region is a densely populated area having buildings constructed
over and near a vast array of earthquake fault
systems capable of producing major earthquakes,
similar to or exceeding the geologic activities
occurring during the 1994 Northridge Earthquake.

The proposed amendment is intended to prevent
occupants from being trapped in a building and to
allow rescue workers to easily enter after an
earthquake.

12.2.3.1, Exception 3, by limiting the number of
stories and height of the structure to two stories will significantly minimize the impact of vertical
irregularities and concentration of inelastic behavior
from mixed structural systems. This proposed
amendment is a continuation of an amendment
adopted during previous code adoption cycles, and is
necessary due to the increased risk of significant
earthquakes in the County.
1613.8.2 Geological A joint Structural Engineers Association of Southern California (SEAOSC), Los Angeles County and
Los Angeles City Task Force investigated the
performance of concrete and masonry construction
with flexible wood diaphragm failures after the
Northridge earthquake. It was concluded at that time
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Code
Section
Condition Explanation of Amendment
that continuous ties are needed at specified spacing
to control cross grain tension in the interior of the
diaphragm. Additionally, there was a need to limit
subdiaphragm allowable shear loads to control
combined orthogonal stresses within the diaphragm.

Recognizing the importance and need to continue the
recommendation made by the task force while taking
into consideration the improved performances and
standards for diaphragm construction today, this
proposal increases the continuous tie spacing limit to
40 ft in lieu of 25 ft and to use 75% of the allowable
code diaphragm shear to determine the depth of the
sub-diaphragm in lieu of the 300 plf and is deemed
appropriate and acceptable. Due to the frequency of
this type of failure during the past significant
earthquakes, various jurisdictions within the Los
Angeles region have taken this additional step to
prevent roof or floor diaphragms from pulling away
from concrete or masonry walls. This proposed
amendment is a continuation of an amendment
adopted during previous code adoption cycles.
1613.8.3 Geological The inclusion of the importance factor in the referenced Section equation has the unintended
consequence of reducing the minimum seismic
separation distance for important facilities such as
hospitals, schools, police, and fire stations from
adjoining structures. The proposal to omit the
importance factor from the referenced equation in
Section 12.8.6 will ensure that a safe seismic
separation distance is provided. This proposed
amendment is a continuation of an amendment
adopted during previous code adoption cycles.
1613.9 Geological
Topographical
Section is added to improve seismic safety of
buildings constructed on or into hillsides. Due to the
local topographical and geological conditions of the
sites within the greater Los Angeles/Long Beach
region and their probabilities for earthquakes, this
technical amendment is required to address and
clarify special needs for buildings constructed on
hillside locations. A SEAOSC and Los Angeles City
Joint Task Force investigated the performance of
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Code
Section
Condition Explanation of Amendment
hillside building failures after the Northridge
earthquake. Numerous hillside failures resulted in
loss of life and millions of dollars in damage. These
criteria were developed to minimize the damage to
these structures and have been in use by both the
City and County of Los Angeles for several years with
much success. This amendment is a continuation of
an amendment adopted during previous code
adoption cycles.
1613.10 Geological The greater Los Angeles/Long Beach region is a densely populated area having buildings constructed
over and near a vast array of fault systems capable of
producing major earthquakes, similar to or exceeding
the geologic activities occurring during the 1994
Northridge Earthquake. The proposed modification
requiring safe design and construction requirements
for ceiling suspension systems to resist seismic loads
is intended to minimize the amount of damage within
a building and therefore needs to be incorporated into
the code to assure that new buildings and additions to
existing buildings are designed and constructed in
accordance with the scope and objectives of the
California Building Code.
1704.6 Geological
Administrative
The language in section 1704.6 of the California
Building Code permits the owner to employ any
registered design professional to perform structural
observations with minimum guidelines. However, it is
important that the registered design professional
responsible for the structural design has thorough
knowledge of the building he/she designed. By
requiring the registered design professional
responsible for the structural design, or their
designee, who was involved with the design to
observe the construction, the quality of the
observation for major structural elements and
connections that affect the vertical and lateral load
resisting systems of the structure will be greatly
increased. Additional requirements are provided to
help clarify the role and duties of the structural
observer and the method of reporting and correcting
observed deficiencies to the Building Official. This
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Code
Section
Condition Explanation of Amendment
amendment is a continuation of an amendment
adopted during previous code adoption cycles, and is
necessary due to the increased risk of significant
earthquakes in the County.
1704.6.1 Geological With the higher seismic demand placed on buildings and structures in this region, the language in section
1704.6.1, Item 3, of the California Building Code
would permit many low-rise buildings and structures
with complex structural elements to be constructed
without the benefit of a structural observation. By
requiring a registered design professional to observe
the construction, the quality of the observation for
major structural elements and connections that affect
the vertical and lateral load resisting systems of the
structure will be greatly increased. An exception is
provided to permit simple structures and buildings to
be excluded. This amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the increased risk of
significant earthquakes in the County.
1705.3 Geological Results from studies after the 1994 Northridge Earthquake indicated that a significant portion of the
damage was attributable to lack of quality control
during construction resulting in poor performance of
the building or structure. Therefore, the amendment
restricts the exceptions to the requirement for special inspection. This amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the increased risk of
significant earthquakes in the County.
1705.13 Geological In Southern California, very few detached one- or twofamily dwellings not exceeding two stories above grade plane are built as "box-type" structures
specially for those in hillside areas and near the
oceanfront. Many with steel moment frames or
braced frames, and/or cantilevered columns, can still
be shown as "regular" structures by calculations.

With the higher seismic demand placed on buildings
and structures in this region, the language in
section 1705.13, Item 3, of the California Building
Code would permit many detached one- or two-family
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Code
Section
Condition Explanation of Amendment
dwellings not exceeding two stories above grade
plane with complex structural elements to be
constructed without the benefit of special inspections.

By requiring special inspections, the quality of major
structural elements and connections that affect the
vertical and lateral load resisting systems of the
structure will be greatly increased. The exception
should only be allowed for detached one- or twofamily dwellings not exceeding two stories above grade plane assigned to Seismic Design Categories
A, B, and C.
1807.1.4 Climatic
Geological
No substantiating data has been provided to show
that a wood foundation is effective in supporting
buildings and structures during a seismic event while
being subject to deterioration caused by the combined
detrimental effect of constant moisture in the soil and wood-destroying organisms. Wood retaining walls,
when they are not properly treated and protected
against deterioration, have performed very poorly and
have led to slope failures. Most contractors are
typically accustomed to construction in dry and
temperate weather in the Southern California region
and are not generally familiar with the necessary
precautions and treatment of wood that makes it
suitable for both seismic events and wet applications.

The proposed amendment takes the necessary
precautionary steps to reduce or eliminate potential
problems that may result by using wood foundations
that experience relatively rapid decay due to the fact
that the region does not experience temperatures cold
enough to destroy or retard the growth and
proliferation of wood-destroying organisms. This
amendment is a continuation of an amendment
adopted during previous code adoption cycles, and is
necessary due to the local climate and the increased
risk of significant earthquakes in the County.
1807.1.6 Geological With the higher seismic demand placed on buildings and structures in this region, it is necessary to take
precautionary steps to reduce or eliminate potential
problems that may result by following prescriptive
design provisions that do not take into consideration
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Code
Section
Condition Explanation of Amendment
the surrounding environment. Plain concrete
performs poorly in withstanding the cyclic forces
resulting from seismic events. In addition, no
substantiating data has been provided to show that
under-reinforced foundation walls are effective in
resisting seismic loads, and may potentially lead to a
higher risk of failure. It is important that the benefit and expertise of a registered design professional be
obtained to properly analyze the structure and take
these issues into consideration. This amendment is a
continuation of an amendment adopted during
previous code adoption cycles.
1807.2 Climatic,
Geological
No substantiating data has been provided to show
that wood foundation systems are effective in
supporting buildings and structures during a seismic
event while being subject to deterioration caused by
the combined detrimental effects of constant moisture
in the soil and wood-destroying organisms. Wood
foundation systems not properly treated and protected
against deterioration have performed very poorly and
have led to slope failures. Most contractors are
typically accustomed to construction in dry and
temperate weather in the Southern California region
and are not generally familiar with the necessary
precautions and treatment of wood that makes it
suitable for both seismic events and wet applications.

The proposed amendment takes the precautionary
steps to reduce or eliminate potential problems that
may result in using wood foundation systems that
experience relatively rapid decay due to the fact that
the region does not experience temperatures cold
enough to destroy or retard the growth and
proliferation of wood-destroying organisms. This
proposed amendment is a continuation of an
amendment adopted during previous code adoption
cycles.
1807.3.1 Climatic,
Geological
No substantiating data has been provided to show
that wood foundation systems are effective in
supporting buildings and structures during a seismic
event while being subject to deterioration caused by
the combined detrimental effects of constant moisture
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Code
Section
Condition Explanation of Amendment
in the soil and wood-destroying organisms. Wood
foundation systems not properly treated and protected
against deterioration have performed very poorly and
have led to slope failures. Most contractors are
typically accustomed to construction in dry and
temperate weather in the Southern California region
and are not generally familiar with the necessary
precautions and treatment of wood that makes it
suitable for both seismic events and wet applications.

The proposed amendment takes the precautionary
steps to reduce or eliminate potential problems that
may result in using wood foundation systems that
experience relatively rapid decay due to the fact that
the region does not experience temperatures cold
enough to destroy or retard the growth and
proliferation of wood-destroying organisms. This
proposed amendment is a continuation of an
amendment adopted during previous code adoption
cycles.
1809.3 and
Figure 1809.3
Geological With the higher seismic demand placed on buildings and structures in this region, it is necessary to take
precautionary steps to reduce or eliminate potential
problems that may result for under-reinforced footings
located on sloped surfaces. Requiring minimum
reinforcement for stepped footings is intended to
address the problem of poor performance of plain or
under-reinforced footings during a seismic event.

This amendment is a continuation of an amendment
adopted during previous code adoption cycles.
1809.7 and
Table 1809.7
Geological No substantiating data has been provided to show that under-reinforced footings are effective in resisting seismic loads, and therefore they may potentially lead
to a higher risk of failure. This amendment requires
minimum reinforcement in continuous footings to
address the problem of poor performance of plain or
under-reinforced footings during a seismic event.

With the higher seismic demand placed on buildings
and structures in this region, it is necessary to take
precautionary steps to reduce or eliminate potential
problems that may result by following prescriptive
design provisions for footings that do not take into
Enclosure A
203
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Code
Section
Condition Explanation of Amendment
consideration the surrounding environment. It is
important that the benefit and expertise of a
registered design professional be obtained to properly
analyze the structure and take these factors into
consideration. This amendment reflects the
recommendations by the SEAOSC and the Los
Angeles City Joint Task Force, which investigated the
performance deficiencies observed in the 1994
Northridge Earthquake. This amendment is a
continuation of an amendment adopted during
previous code adoption cycles.
1809.12 Climatic
Geological
No substantiating data has been provided to show
that timber footings are effective in supporting
buildings and structures during a seismic event while
being subject to deterioration caused by the combined
detrimental effects of constant moisture in the soil and wood-destroying organisms. Timber footings, when
they are not properly treated and protected against
deterioration, have performed very poorly. Most
contractors are typically accustomed to construction
in dry and temperate weather in the Southern
California region and are not generally familiar with
the necessary precautions and treatment of wood that
makes it suitable for both seismic events and wet
applications. The proposed amendment takes the
necessary precautionary steps to reduce or eliminate
potential problems, which may result by using timber
footings that experience relatively rapid decay due to
the fact that the region does not experience
temperatures cold enough to destroy or retard the
growth and proliferation of wood-destroying
organisms. This amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the local climate and
the increased risk of significant earthquakes in the
County.
1810.3.2.4 Climatic
Geological
No substantiating data has been provided to show
that timber footings are effective in supporting
buildings and structures during a seismic event while
being subject to deterioration caused by the combined
detrimental effects of constant moisture in the soil and Enclosure A
204
HOA.105556295.10 140
Code
Section
Condition Explanation of Amendment
wood-destroying organisms. Timber footings, when
they are not properly treated and protected against
deterioration, have performed very poorly. Most
contractors are typically accustomed to construction
in dry and temperate weather in the Southern
California region and are not generally familiar with
the necessary precautions and treatment of wood that
makes it suitable for both seismic events and wet
applications. The proposed amendment takes the
necessary precautionary steps to reduce or eliminate
potential problems that may result by using timber
footings that experience relatively rapid decay due to
the fact that the region does not experience
temperatures cold enough to destroy or retard the
growth and proliferation of wood-destroying
organisms. This amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the local climate and
the increased risk of significant earthquakes in the
County.
1905.1 Geological This amendment is intended to carry over critical provisions for the design of concrete columns in
moment frames from the legacy 1997 Uniform
Building Code. Increased confinement is critical to
the integrity of such columns and these modifications
ensure that it is provided when certain thresholds are
exceeded. In addition, this amendment carries over
from the legacy 1997 Uniform Building Code a critical
provision for the design of concrete shear walls. It
essentially limits the use of very highly gravity-loaded walls in being included in the seismic load resisting
system, since their failure could have catastrophic
effect on the building. Furthermore, this amendment
was incorporated in the code based on observations
from the 1994 Northridge Earthquake. Rebar placed
in very thin concrete topping slabs have been
observed in some instances to have popped out of
the slab due to insufficient concrete coverage. This
modification ensures that critical boundary and
collector rebars are placed in sufficiently thick topping slab to prevent buckling of such reinforcements. This
Enclosure A
205
HOA.105556295.10 141
Code
Section
Condition Explanation of Amendment
proposed amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the increased risk of
significant earthquakes in the County.
1905.6.2 Geological This amendment requires minimum reinforcement in continuous footings to address the problem of poor
performance of plain or under-reinforced footings
during a seismic event. This amendment reflects the
recommendations by the SEAOSC and the
Los Angeles City Joint Task Force, which investigated
the poor performance observed in the 1994
Northridge Earthquake. This amendment is a
continuation of an amendment adopted during
previous code adoption cycles, and is necessary due
to the increased risk of significant earthquakes in the County.
1905.8
through
1905.10
Geological These amendments are intended to carry over critical provisions for the design of concrete columns in
moment frames from the Uniform Building Code
(UBC). Increased confinement is critical to the
integrity of such columns and these modifications
ensure that it is provided when certain thresholds are
exceeded. In addition, this amendment carries over
from the UBC a critical provision for the design of
concrete shear walls. It essentially limits the use of
very highly gravity-loaded walls from being included in the seismic load resisting system, since their failure
could have a catastrophic effect on the building.

Furthermore, this amendment was incorporated into
this Code based on observations from the 1994
Northridge Earthquake. Rebar placed in very thin
concrete topping slabs has been observed in some
instances to have popped out of the slab due to
insufficient concrete coverage. This modification
ensures that critical boundary and collector rebars are placed in sufficiently thick slabs to prevent buckling of such reinforcements. This amendment is a
continuation of an amendment adopted during
previous code adoption cycles, and is necessary due
to the increased risk of significant earthquakes in the County.

Enclosure A
206
HOA.105556295.10 142
Code
Section
Condition Explanation of Amendment
2304.10.2
and Table
2304.10.2
Geological Due to the high geologic activities in the Southern California area and the expected higher level of
performance on buildings and structures, this
proposed local amendment limits the use of staple
fasteners in resisting or transferring seismic forces. In September 2007, limited cyclic testing data was
provided to the ICC, Los Angeles Chapter Structural
Code Committee, showing that stapled wood
structural shear panels do not exhibit the same
behavior as nailed wood structural shear panels. The
test results of stapled wood structural shear panels
demonstrated much lower strength and drift than
nailed wood structural shear panel test results.

Therefore, the use of staples as fasteners to resist or transfer seismic forces shall not be permitted without
being substantiated by cyclic testing. This
amendment is a continuation of a similar amendment
adopted during previous code adoption cycles, and is
necessary due to the increased risk of significant
earthquakes in the County.
2304.10.3.1 Geological The overdriving of nails into the structural wood panels still remains a concern when pneumatic nail
guns are used for wood structural panel shear wall
nailing. Box nails were observed to cause massive
and multiple failures of the typical 3/8-inch thick
plywood during the 1994 Northridge Earthquake. The
use of clipped head nails continues to be restricted
from use in wood structural panel shear walls where
the minimum nail head size must be maintained in
order to minimize nails from pulling through sheathing
materials. Clipped or mechanically driven nails used
in wood structural panel shear wall construction were
found to perform much worse in previous wood
structural panel shear wall testing done at the
University of California Irvine. The existing test
results indicated that, under cyclic loading, the wood
structural panel shear walls were less energy
absorbent and less ductile. The panels reached
ultimate load capacity and failed at substantially less lateral deflection than those using same-size handdriven nails. This amendment reflects the Enclosure A
207
HOA.105556295.10 143
Code
Section
Condition Explanation of Amendment
recommendations by the SEAOSC and the Los
Angeles City Joint Task Force, which investigated the
poor performance observed in the 1994 Northridge
Earthquake. This amendment is a continuation of an
amendment adopted during previous code adoption
cycles, and is necessary due to the increased risk of
significant earthquakes in the County.
2304.12.2.8 Climatic
Geological
No substantiating data has been provided to show
that wood used in retaining or crib walls is effective in supporting buildings and structures during a seismic
event while being subject to deterioration caused by
the combined detrimental effect of constant moisture
in the soil and wood-destroying organisms. Wood
used in retaining or crib walls, when it is not properly treated and protected against deterioration, has
performed very poorly. Most contractors are typically
accustomed to construction in dry and temperate
weather in the Southern California region and are not
generally familiar with the necessary precautions and
treatment of wood that makes it suitable for both
seismic events and wet applications. The proposed
amendment takes the necessary precautionary steps
to reduce or eliminate potential problems that may
result by using wood in retaining or crib walls, which
experience relatively rapid decay due to the fact that
the region does not experience temperatures cold
enough to destroy or retard the growth and
proliferation of wood-destroying organisms. This
amendment is a continuation of an amendment
adopted during previous code adoption cycles, and is
necessary due to the local climate and the increased
risk of significant earthquakes in the County.
2305.4 Geological Many of the hold-down connectors currently in use do not have any acceptance report based on dynamic
testing protocols. This amendment continues to limit
the allowable capacity to 75% of the acceptance
report value to provide an additional factor of safety
for statically tested anchorage devices. Cyclic forces
imparted on buildings and structures by seismic
activity cause more damage than equivalent forces
that are applied in a static manner. Steel plate
Enclosure A
208
HOA.105556295.10 144
Code
Section
Condition Explanation of Amendment
washers will reduce the additional damage that can
result when hold-down connectors are fastened to
wood framing members. This amendment reflects the
recommendations by the SEAOSC and the
Los Angeles City Joint Task Force, which investigated
the poor performance observed in the 1994
Northridge Earthquake. This amendment is a
continuation of an amendment adopted during
previous code adoption cycles, and is necessary due
to the increased risk of significant earthquakes in the County.
2306.2
2306.3
2307.2
2308.10.5.1
2308.10.5.2
Figure
2308.10.5.1
and Figure
2308.10.5.2
Geological The SEAOSC and the Los Angeles City Joint Task Force that investigated damage to buildings and
structures during the 1994 Northridge Earthquake
recommended reducing allowable shear values in
wood structural panel shear walls or diaphragms that
were not substantiated by cyclic testing. That
recommendation was consistent with a report to the
Governor from the Seismic Safety Commission of the
State of California recommending that code
requirements be "more thoroughly substantiated with
testing." The allowable shear values for wood
structural panel shear walls or diaphragms fastened
with staples are based on monotonic testing and do
not take into consideration that earthquake forces
load shear wall or diaphragm in a repeating and fully
reversible manner. In September 2007, limited cyclic
testing was conducted by a private engineering firm to
determine if wood structural panels fastened with
staples would exhibit the same behavior as wood
structural panels fastened with common nails. The
test result revealed that wood structural panels
fastened with staples demonstrated much lower
strength and stiffness than wood structural panels
fastened with common nails. It was recommended
that the use of staples as fasteners for wood
structural panel shear walls or diaphragms not be
permitted to resist seismic forces in structures
assigned to Seismic Design Categories D, E, and F
unless it can be substantiated by cyclic testing.

Furthermore, the cities and unincorporated areas
Enclosure A
209
HOA.105556295.10 145
Code
Section
Condition Explanation of Amendment
within the greater Los Angeles/Long Beach region
have taken extra measures to maintain the structural
integrity of the framing of shear walls and diaphragms
designed for high levels of seismic forces by requiring wood sheathing be applied directly over the framing
members and prohibiting the use of panels placed
over gypsum sheathing. This amendment is intended
to prevent the undesirable performance of nails when
gypsum board softens due to cyclic earthquake
displacements and the nail ultimately does not have
any engagement in a solid material within the
thickness of the gypsum board. This amendment
continues the previous amendment adopted during
the 2007 code adoption cycle.
2308.10.8.1 Geological With the higher seismic demand placed on buildings and structures in this region, interior walls can easily be called upon to resist over half of the seismic
loading imposed on simple buildings or structures.

Without a continuous foundation to support the
braced wall line, seismic loads would be transferred
through other elements such as non-structural
concrete slab floors, wood floors, etc. The purpose of
this amendment is to limit the use of the exception to
structures assigned to Seismic Design Category A, B,
or C where lower seismic demands are expected.

Table
2308.10.1
Geological This amendment specifies minimum sheathing
thickness and nail size and spacing so as to provide a
uniform standard of construction for designers and
buildings to follow. This is intended to improve the
performance level of buildings and structures that are
subject to the higher seismic demands placed on
buildings or structure in this region. This proposed
amendment reflects the recommendations by the
SEAOSC and the Los Angeles City Joint Task Force,
Enclosure A
210
HOA.105556295.10 146
Code
Section
Condition Explanation of Amendment
which investigated the performance deficiencies
observed in the 1994 Northridge Earthquake. This
amendment is a continuation of an amendment
adopted during previous code adoption cycles, and is
necessary due to the increased risk of significant
earthquakes in the County.
2308.10.9 Geological Due to the high geologic activities in the Southern California area and the required higher level of
performance of buildings and structures, this
amendment limits the use of staple fasteners in
resisting or transferring seismic forces. In September
2007, limited cyclic testing data was provided to the
ICC, Los Angeles Chapter Structural Code
Committee, showing that stapled wood structural
shear panels do not exhibit the same behavior as
nailed wood structural shear panels. The test results
of stapled wood structural shear panels demonstrated
much lower strength and drift than nailed wood
structural shear panel test results. Therefore, the use of staples as fasteners to resist or transfer seismic
forces shall not be permitted without being
substantiated by cyclic testing. This amendment is a
continuation of a similar amendment adopted during
previous code adoption cycles.
3114; Climatic,
Geologic
The greater Los Angeles/Long Beach region is
situated over a vast array of earthquake fault systems
capable of producing major earthquakes, similar to or
exceeding the geologic activities occurring during the
1994 Northridge Earthquake. The region is further
impacted by construction of buildings and structures
utilizing traditional construction materials that impact the amount of energy, air quality, greenhouse gas
emission and construction waste in the area. The
proposed amendment addresses structural design
requirements specific to intermodal shipping
containers, reduce environmental impact of unused
and unrecycled intermodal shipping containers, and
increase sustainability by reducing consumption of
traditional construction materials. The proposed
modification needs to be incorporated into the code to
assure that new buildings and additions to existing
Enclosure A
211
HOA.105556295.10 147
Code
Section
Condition Explanation of Amendment
buildings utilizing intermodal shipping containers are
designed and constructed in accordance with the
scope and objectives of the California Building Code
and California Green Building Standards Code
Appendix C Climatic,
Geologic,
Voluntary
appendix
Los Angeles County is a diverse region with both
densely populated urban areas and rural areas with
various agricultural and animal husbandry
establishments. Many areas of the County have been
designated as Fire Hazard Severity Zones due to the
increased risk of fire caused by low humidity, strong
winds, and dry vegetation, particularly the rural areas, which are often used for agricultural purposes.

Furthermore, the greater Los Angeles/Long Beach
region is situated over a vast array of earthquake fault systems capable of producing major earthquakes,
similar to or exceeding the geologic activities
occurring during the 1994 Northridge Earthquake.

Due to the need for agricultural buildings to perform
appropriately in the County due to its geology and
climate, adoption of building standards for such
structures is required.

Appendix H Climatic,
Geologic,
Voluntary
appendix
Los Angeles County is a diverse region with both
densely populated urban areas and rural areas with
various signs used in the County. The Los Angeles
region is situated over a vast array of earthquake fault systems capable of producing major earthquakes,
similar to or exceeding the geologic activities
occurring during the 1994 Northridge Earthquake. In
addition, weather events occur seasonally with high
winds such as the Santa Ana Winds. Due to the need
for signs to perform well in the County due to its
climate and geology, adoption of building standards
for signs is required.

H103.1 Geologic,
Administrative,
Voluntary
appendix
Los Angeles County is a diverse region with both
densely populated urban areas and rural areas with
various signs used in the County. The greater
Los Angeles/Long Beach region is situated over a
vast array of earthquake fault systems capable of
producing major earthquakes, similar to or exceeding
the geologic activities occurring during the 1994
Northridge Earthquake. This provision is amended to
Enclosure A
212
HOA.105556295.10 148
Code
Section
Condition Explanation of Amendment
cross-reference to applicable legal provisions and
also to ensure that signs are located in such a way as
to avoid damage to adjacent structures and people
given the potential for earthquakes in the County.

H103.2 Geologic,
Administrative,
Voluntary
appendix
Los Angeles County is a diverse region with both
densely populated urban areas and rural areas with
various signs used in the County. The greater
Los Angeles/Long Beach region is situated over a
vast array of earthquake fault systems capable of
producing major earthquakes, similar to or exceeding
the geologic activities occurring during the 1994
Northridge Earthquake. This provision is amended to
cross-reference to applicable legal provisions and
also to ensure that sign projections and clearances
are located in such a way as to avoid damage to
adjacent structures and people given the potential for
earthquakes in the County.

H104.1 Geologic,
Voluntary
appendix
The greater Los Angeles/Long Beach region is
situated over a vast array of earthquake fault systems
capable of producing major earthquakes, similar to or
exceeding the geologic activities occurring during the
1994 Northridge Earthquake. Due to the risk of
geologic activities in the Southern California area,
buildings and structures require a high level of
performance, which is directly proportional to the
weight of a structure. By adding the weight of a sign
to the identification placard, it will improve the ability to provide structural verification in the event of
damage or future modifications.

H105.1 Administrative,
Voluntary
appendix
The amendment provides a cross reference to
Chapter 24 for user convenience.

H106.1,
H106.2
Administrative,
Voluntary
appendix
This change corrects a call out from the model
electrical code to the relevant local electrical code and clarifies that a separate electrical permit is required for user convenience.

H110.1 Climatic,
Voluntary
appendix
Due to the potential for severe local weather
conditions with torrential rain, it is necessary to clarify that no portions of the roof sign and supporting
members may interfere with proper roof drainage to
Enclosure A
213
HOA.105556295.10 149
Code
Section
Condition Explanation of Amendment
prevent the potential for roof collapse due to water
accumulation.

H116 Climatic,
Voluntary
appendix
Due to the potential for severe local weather with high speed winds and hot, dry conditions, it is necessary
that the most recent test standards as specified in
Chapter 35 are adopted in lieu of the older test
standards specified in Section H116. This ensures
that the risk from fires is minimized.

J101.1 to
J101.9
Geological
Topographical
Climatic
Sections revised to include erosion and sediment
control measures to address the complex and diverse
set of soil types and geologic conditions that exist in the greater Los Angeles County/Long Beach region.

J101.10 Geological
Topographical
Climatic
Section revised to maintain safety and integrity of
public or private property adjacent to grading sites
due to the complex and diverse set of soil types,
climates, and geologic conditions that exist in the
greater Los Angeles County/Long Beach region.

J103.1 –
J103.2 and
Figure J103.2
Geological
Topographical
Climatic
Sections revised to provide adequate control of
grading operations typical to the greater Los Angeles
County/Long Beach region due to the complex and
diverse set of soil types, climates, and geologic
conditions that exist in the greater Los Angeles
County/Long Beach region.

J104.2.1 –
J104.4
Geological
Topographical
Climatic
Sections revised or added to provide adequate control
of grading operations typical to the greater Los
Angeles County/Long Beach region due to the
complex and diverse set of soil types, climates, and
geologic conditions that exist in the greater
Los Angeles County/Long Beach region.

J105.1-
J105.14
Geological
Topographical
Climatic
Sections revised or added to provide adequate control
of grading operations typical to the greater Los
Angeles County/Long Beach region due to the
complex and diverse set of soil types, climates, and
geologic conditions that exist in the greater
Los Angeles County/Long Beach region.

J106.1 Geological
Topographical
Climatic
Section revised to require more stringent cut slope
ratios to address the complex and diverse set of soil
types and geologic conditions that exist in the greater Los Angeles County/Long Beach region.

J107.1-
J107.7
Geological
Topographical
Sections revised to provide more stringent fill
requirements for slope stability and settlement due to
Enclosure A
214
HOA.105556295.10 150
Code
Section
Condition Explanation of Amendment
Climatic the complex and diverse set of soil types, climates, and geologic conditions that exist in the greater
Los Angeles County/Long Beach region.

J107.8 –
J107.9
Geological
Topographical
Climatic
Sections revised to provide more stringent inspection
and testing requirements for fill slope stability due to the complex and diverse set of soil types, climates,
and geologic conditions that exist in the greater
Los Angeles County/Long Beach region.

J108.1 –
J108.4
Geological
Topographical
Climatic
Sections revised to provide more stringent slope
setback requirements to address the complex and
diverse set of soil types, climates, and geologic
conditions that exist in the greater Los Angeles
County/Long Beach region.

J109.1 –
J109.3
Geological
Topographical
Climatic
Sections revised to provide more stringent drainage
and terracing requirements to address the complex
and diverse set of soil types, climates, and geologic
conditions that exist in the greater Los Angeles
County/Long Beach region.

J109.5 Geological
Topographical
Climatic
Subsection added to provide for adequate outlet of
drainage flows due to the diverse set of soil types,
climates, and geologic conditions that exist in the
greater Los Angeles County/Long Beach region.

J110.1 -
J110.8.5
Geological
Topographical
Climatic
Sections revised or added to provide for State
requirements of storm water pollution prevention and
more stringent slope planting, and slope stability
requirements to control erosion due to the complex
and diverse set of soil types, climates, and geologic
conditions that exist in the greater Los Angeles
County/Long Beach region.

J111 Geological
Topographical
Climatic
Section revised to reference additional standards for
soils testing due to the complex and diverse set of soil types, climates, and geologic conditions that exist in
the greater Los Angeles County/Long Beach region.

Appendix Q
Q101.1,
Q102.1,
Q103.1,
Q103.4,
Q107.1
Administrative,
Voluntary
appendix
Climatic
Geologic
Topographical
Adoption of this appendix is necessary because strict
compliance with State and local standards and laws
would prevent, hinder, or delay the mitigation of the
effects of a declared shelter crisis, local emergency or state of emergency. The modifications to this
appendix are administrative in nature, to provide
clarification of various provisions of the language of
this voluntary Appendix.

Enclosure A
215
HOA.105556295.10 151
Code
Section
Condition Explanation of Amendment
Q106.1 Climatic Los Angeles County is subject to extreme temperatures, and many of these membrane
structures will be erected and occupied during severe
weather events. It is necessary to include this
amendment to ensure the safety, health, and comfort
of the occupants is maintained during extreme heat
and cold.

Q110.1.1,
Q110.1.2
Administrative These sections are a cross reference to the State Plumbing Code requirement for user convenience and
is not adding a new building standard nor enacting a
more restrictive requirement. To the extent findings
are requested, see prefatory language in this Section.

Q110.3 Climatic,
Voluntary
appendix
The County may utilize mobile restroom facilities that
are physically separate from the living facilities. Due to the potential for severe local weather conditions,
with extreme temperatures or torrential rain, the
distance to the restroom facilities required for the
comfort, safety, and health of displaced people should
be reduced to 300 feet or as determined by the
Building Official.

SECTION 93. This ordinance shall become operative on January 1, 2026. [TITLE26BUILDCODE2025CSCC]
Enclosure A
216
HOA.105548025.13

ANALYSIS
This ordinance repeals those provisions of Title 27 – Electrical Code – of the Los Angeles County Code that incorporate by reference portions of the 2022 California Electrical Code and replaces them with provisions incorporating by reference portions of the 2025 California Electrical Code, as published by the California Building Standards Commission. Unless deleted or modified herein, the previously enacted provisions of Title 27 continue in effect.

The provisions of this ordinance contain additions to the 2025 California Electrical Code and are administrative in nature in that they do not constitute changes or modifications to requirements contained in the building standards published in the 2025 California Electrical Code.

DAWYN R. HARRISON
County Counsel
By
MARGARET F. AMBROSE
Senior Deputy County Counsel
Public Works Division
MFA:bc
Requested: 7/28/25
Revised: 10/8/25
Enclosure B 217
HOA.105548025.13
ORDINANCE NO. ______________
An ordinance amending Title 27 – Electrical Code – of the Los Angeles County Code by adopting and incorporating by reference portions of the 202225 California Electrical Code with certain changes and modifications and making other revisions thereto.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Sections 89.102 through 89.114 of Article 89, Article 90, Chapters 1 through 9, and Annexes A, B, C, D, E, F, G, H, I, and J, of Title 27 of the Los Angeles County Code, which incorporate by reference and modify portions of the 201922 California Electrical Code, are hereby repealed.

SECTION 2. Section 80-1.5 is hereby amended to read as follows:

Sec. 80-1.5. California Electrical Code (CEC) Adoption by Reference.

Except as hereinafter changed or modified, Sections 89.102 through 89.114 of Article 89, Article 90, Chapters 1 through 9, and Annexes A, B, C, D, E, F, G, H, I, and J, and K, of that certain Electrical Code known and designated as the 20222025 California Electrical Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 27 of the Los Angeles County Code as if fully set forth below, as Sections 89.102 through 89.114 of Article 89, Article 90, Chapters 1 through 9, and Annexes A, B, C, D, E, F, G, H, I, and J, and K, of Title 27 of the Los Angeles County Code.

Enclosure B 218
HOA.105548025.13 2
A copy of the 20222025 California Electrical Code, hereinafter referred to as the CEC, shall be at all times maintained by the Chief Electrical Inspector for use and examination by the public.

SECTION 3. Section 80-10 is hereby amended to read as follows:

Sec. 80-10. Annual Review of Fees
The fees in this Code shall be reviewed annually by the Director of Public Works. Beginning on July 1, 1992, and thereafter on each succeeding July 1, the amount of each fee in this Code shall be adjusted as follows: Calculate the percentage movement between March of the previous year and March of the current year in the Consumer Price Index (CPI) for all urban consumers in the Los Angeles-Long BeachAnaheim, CA areas, as published by the United States Government Bureau of Labor Statistics, and adjust each fee by said percentage amount and round off to the nearest ten (10) cents; provided, however, no adjustment shall decrease any fee and no fee shall exceed the reasonable cost of providing services. When it is determined that the amount reasonably necessary to recover the cost of providing services is in excess of this adjustment, the Building Official may present fee proposals to the Board of Supervisors for approval.

SECTION 4. The provisions of this ordinance contain additions to the 2025 California Electrical Code and are administrative in nature in that they do not constitute changes or modifications to requirements contained in the building standards published in the California Electrical Code.

Enclosure B 219
HOA.105548025.13 3
SECTION 5. This ordinance shall become operative on January 1, 2026. [TITLE27ELECTCODE2025CSCC]
Enclosure B 220
HOA.105559019.8

ANALYSIS
This ordinance repeals those provisions of Title 28 – Plumbing Code – of the Los Angeles County Code, that incorporated by reference portions of the 2022 Edition of the California Plumbing Code and replaces them with provisions incorporating by reference portions of the 2025 California Plumbing Code, as published by the California Building Standards Commission, with certain changes and modifications. Unless deleted or modified herein, the previously enacted provisions of Title 28 continue in effect.

State law requires that the County's Plumbing Code impose the same requirements as are contained in the building standards published in the most recent edition of the California Plumbing Code except for changes or modifications deemed reasonably necessary by the County because of local climatic, geologic, or topographic conditions.

The changes and modifications to requirements contained in the building standards published in the 2025 California Plumbing Code that are contained in this ordinance are based upon express findings contained in the ordinance that such changes are reasonably necessary due to local climatic, geologic, or topographic conditions. These changes and modifications are substantially equivalent to changes or modifications previously filed with the California Building Standards Commission by the County of Los Angeles which were in effect as of September 30, 2025, in compliance with recent changes to section 17958 of the California Health and Safety Code.

This ordinance also makes certain modifications to the administrative provisions of Title 28.

DAWYN R. HARRISON
County Counsel
By

MARGARET AMBROSE
Principal Deputy County Counsel
MA/bc
Requested: 08/21/25
Revised: 10/10/25
Enclosure C 221
HOA.105559019.8
ORDINANCE NO.

An ordinance amending Title 28 – Plumbing Code – of the Los Angeles County Code, to adopt and incorporate by reference portions of the 2025 California Plumbing Code, with certain changes and modifications, and to make other revisions thereto.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Sections 119.1.2.0 through 119.1.14.0 of Chapter 1, Chapters 2 through 17, and Appendices A, B, D, H, I, and J, of the Los Angeles County Code, which incorporate by reference and modify portions of the 2022 California Plumbing Code, are hereby repealed.

SECTION 2. Chapter 1 is hereby amended to read as follows:

CHAPTER 1

ADMINISTRATION
100 ADOPTION AND INCORPORATION BY REFERENCE.

Except as hereinafter changed or modified, Sections 1.2.0 through 1.14.0 of Chapter 1, Division I, of that certain Plumbing Code known and designated as the 20222025 California Plumbing Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 28 of the Los Angeles County Code as if fully set forth below, and shall be known as Sections 119.1.2.0 through 119.1.14.0, respectively, of Chapter 1 of Title 28 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 17 and Appendices A, B, D, H, I, and J, M, and S, of that certain Plumbing Code known and Enclosure C 222
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designated as the 20222025 California Plumbing Code as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 28 of the Los Angeles County Code as if fully set forth below, and shall be known as Chapters 2 through 17, and Appendices A, B, D, H, I, and J, M, and S, of Title 28 of the Los Angeles County Code.

A copy of the 20222025 California Plumbing Code shall be at all times maintained by the Chief Plumbing Inspector for use and examination by the public. . . .

SECTION 3. Section 204.0 is hereby amended to read as follows:
204.0 – B –
. . .

Building Code. The most recent edition of Title 26 of the Los Angeles County Code.
. . .

SECTION 4. Section 206.0 is hereby amended to read as follows:
206.0 – D –
. . .

Demand Hot Water Recirculation System. A hot water recirculation system requiring manual activation and equipped with a thermostat that will automatically shut off the recirculation pump when the water temperature reaches a preset level at the point of use.
. . .

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SECTION 5. Section 207.0 is hereby amended to read as follows:
207.0 – E –
. . .

Electrical Code. The most recent edition of Title 27 of the Los Angeles County Code.
. . .

SECTION 6. Section 210.0 is hereby amended to read as follows:
210.0 – H –
. . .

Hot Water Recirculation System. A hot water distribution system that reduces the time needed to deliver hot water to fixtures that are distant from the water heater, boiler, or other water heating equipment. The recirculation system is comprised of hot water supply and return piping with shutoff valves, balancing valves, and circulating pumps, and a method of controlling the circulating system. . . .

SECTION 7. Section 215.0 is hereby amended to read as follows:
215.0 – M –
. . .

Mechanical Code. The most recent edition of Title 29 of the Los Angeles County Code.
. . .

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SECTION 8. Section 301.2.2 is hereby amended to read as follows:
301.2.2 Standards. Standards listed or referred to in this cChapter or other chapters cover materials that will conform to the requirements of this cCode, where used in accordance with the limitations imposed in this or other chapters thereof and their listing. Where a standard covers materials of various grades, weights, quality, or configurations, the portion of the listed standard that is applicable shall be used.

Design and materials for special conditions or materials not provided for herein shall be permitted to be used only by special permission of the Authority Having Jurisdiction after the Authority Having Jurisdiction has been satisfied as to their adequacy. A list of plumbing standards that appear in specific sections of this cCode is referenced in Table 1701.1. Standards referenced in Table 1701.1 shall be applied as indicated in the applicable referenced section. A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections of this cCode appear in Table 1701.2. Solar thermal energy systems and material standards are referenced in Tables U 18.1 and U 18.2 of Appendix U. AnIAPMO Installation Standards isare referenced in Appendix I for the convenience of the users of this cCode. It is not considered as a part of this cCode unless formally adopted as such by the Authority Having Jurisdiction.

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SECTION 9. Section 301.3 is hereby amended to read as follows:
301.3 Alternate Materials and Methods of Construction
Equivalency and Modifications.
301.3.1 Alternate Materials and Methods of Construction.

Nothing in this cCode is intended to prevent the use of systems, methods, or devices of equivalent or superior quality, strength, fire resistance, effectiveness, durability, and safety over those prescribed by this cCode. Technical documentation shall be submitted to the Authority Having Jurisdiction to demonstrate equivalency prior to installation. The Authority Having Jurisdiction shall have the authority to approve or disapprove the system, method, or device for the intended purpose on a case-by-case basis. [HCD 1] (See Section 1.8.7).
. . .
301.3.1.1 Testing.
. . .
301.3.1.1.1 Tests.
. . .
301.3.1.2.1.2 Request by Authority Having Jurisdiction. . . .
301.3.2 Modifications. Whenever there are practical difficulties involved in carrying out the provisions of this Code, the Authority Having Jurisdiction shall have the authority to grant modifications on a case-by-case basis, upon application of the owner or the owner's authorized agent, provided the Authority Having Jurisdiction Enclosure C 226
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shall first find that a special individual reason makes the strict letter of this Code impractical, that the modification is in conformity with the spirit and purpose of this Code, and that such modification does not lessen any health, fire-protection, or other life-safety-related requirements. The details of any action granting modifications shall be recorded and entered in the files of the Authority Having Jurisdiction. Application for approval of a modification shall be in accordance with Section 103.12.2.

SECTION 10. Section 304.1 is hereby amended to read as follows:
304.1 General. Plumbing fixtures, drains, appurtenances, and appliances, used to receive or discharge liquid wastes or sewage, shall be connected properly to the drainage system of the building or premises, in accordance with the requirements of this cCode.

Exception: [HCD 1] Limited-density owner-built rural dwellings. Where conventional plumbing, in all or in part, is installed within the structure, it shall be installed in accordance with the provisions of this cCode. Alternative materials and methods shall be permitted provided that the design complies with the intent of the cCode, and that such alternatives shall perform to protect health and safety for the intended purpose.

Dual waste piping shall be installed to permit the discharge from clothes washers, bathtubs, showers, and bathroom/restroom wash basins to be used for a graywater irrigation system. Partial connection of plumbing fixtures to the graywater system, based on accepted engineering practices and required volume of water for irrigation, shall be accepted. Graywater systems shall be designed and installed in Enclosure C 227
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accordance with Chapter 15 and other parts of this Code.

Exceptions:
(1) Buildings with a graywater system, rain catchment system, or recycled water system.
(2) Sites with landscape areas not exceeding 500 square feet. (3) Projects where graywater systems are not permitted due to geological conditions.
(4) Additions and alterations that use the existing building drain.

SECTION 11. Section 601.2.3 is hereby added to read as follows:
601.2.3 Hot Water Recirculation Systems. A hot water
recirculation system shall be installed, as defined in Chapter 2, and shall not allow more than 0.6 gallons of water to be delivered to any fixture before hot water arrives. Hot water recirculation systems may include, but are not limited to, the following:
(1) Timer-initiated systems.
(2) Temperature sensor-initiated systems.
(3) Occupancy sensor-initiated systems.
(4) Smart hot water recirculation systems.
(5) Demand hot water recirculation systems.
(6) Other systems acceptable to the Authority Having Jurisdiction.

Exception: Minor additions and alterations as determined by the Authority Having Jurisdiction that use the existing water distribution pipe system and which does not contain a hot water recirculation system.

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SECTION 12. Section 609.7 is hereby amended to read as follows:
609.7 Abutting Lot. Nothing contained in this cCode shall be construed to prohibit the use of all or part of an abutting or adjacent lot or lots to:
. . .

SECTION 13. Section 721.3 is hereby added to read as follows:
721.3 Public Sewer. If the public sewer does not extend to a point from which each building on a lot or parcel of land large enough to permit future subdivision can be independently served, the property owner shall construct a public sewer as required by Title 20 – Utilities – of the Los Angeles County Code, Division 2 (Sanitary Sewer and Industrial Waste), to provide adequate sewerage for each such possible parcel.

Exception: When the Authority Having Jurisdiction finds that the character of a lot is such that no further subdivision can be reasonably anticipated, or the use is such as to preclude subdivision, or where the owner has executed a covenant stating that the lot or parcel of land, together with all improvements thereon, will be maintained as a unit and that before any subdivision is made or any portion of said lot is transferred to another owner, separate sewerage facilities as hereinbefore required in this Section will be installed, the drainage system of all buildings may be connected to a common building sewer or private sewage disposal system. The covenant shall be recorded by the owner in the office of the Registrar-Recorder as part of the conditions of ownership of said property. Such agreement shall be binding on all heirs, successors, and assigns to said property.

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This exception shall apply only while the whole of such lot remains in one undivided ownership. Upon the transfer of any portion of such lot other than the whole thereof to another owner, whether such transfer is made before or after the operative date of the ordinance adding this provision, the exception shall cease and a person shall not use or maintain any building or structure except in compliance with the provisions of this Code. As used in this Section, a sale, foreclosure, or contract to sell by the terms of which the purchaser is given the right of possession shall be deemed a transfer.

SECTION 14. Section 728.0 is hereby added to read as follows:
728.0 Building Sewer Connection Requirements.
728.1 Size. That portion of the building sewer extending from the public sewer to the property line shall be not less than 4 inches (100 mm) in internal diameter.
728.2 Depth. When laid within the limits of any public
thoroughfare when the public sewer is sufficiently deep, no building sewer shall be less than 6 feet (1.8 m) below grade. Whenever practicable, the alignment and grade of each building sewer shall be straight from the public sewer to the property line. 728.3 Taps and Saddles. Whenever it becomes necessary to connect a building sewer to a public sewer at a point where no branch fitting has been installed in the public sewer, such connection shall be made as required by Title 20 – Utilities – of the Los Angeles County Code, Division 2 (Sanitary Sewer and Industrial Waste).

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728.4 Connection to Trunks. Whenever required, an approvedtype unvented running trap shall be installed in each building sewer, which is connected directly to a trunk sewer by any means whatsoever. Each such running trap shall be installed in the building sewer between the house drain or drains and the connection to the trunk sewer. A T-type cleanout shall be installed in the building sewer immediately below the running trap. This cleanout need not be extended to grade. Every running trap and cleanout shall be located on the lot served by the building sewer. 728.5 Street Widening. Where a future street or road-widening area has been established by the master plan of highways or in any other manner, all work installed in such area shall conform to the requirements established in this or other related ordinances for work on public property.
728.6 Main Line Required. Building sewer construction shall conform to the requirements of main line sewers as set forth in Title 20 – Utilities – of the Los Angeles County Code, Division 2 (Sanitary Sewer and Industrial Waste), when either of the following conditions exists:

1. Where the Authority Having Jurisdiction requires such construction because of the character or quantity of the sewage or industrial waste to be discharged.

2. Where the sewer is designed to be, or proposed to be, dedicated to the County of Los Angeles at the present or any future time.

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SECTION 15. Table H 101.8 of Appendix H is hereby amended to read as follows:

TABLE H 101.8

LOCATION OF SEWAGE DISPOSAL SYSTEM

MINIMUM HORIZONTAL

DISTANCE BUILDING SEWER SEPTIC

TANK DISPOSAL FIELD SEEPAGE PIT
OR

CESSPOOL
Building or structures1 2 feet 5 feet 8 feet 8 feet
Property line adjoining private
property
Clear2 5 feet 5 feet 8 feet
Water supply wells9 50 feet3 50 feet 100 feet 150 feet
Streams and other bodies of water9 50 feet 50 feet 100 feet7 150 feet7
Trees10 10 feet 10 feet
Seepage pits or cesspools8 5 feet 5 feet 12 feet
Disposal field8 5 feet 4 feet4 5 feet
On-site domestic water service line 1 foots 5 feet 5 feet 5 feet Distribution box 5 feet 5 feet
Pressure public water main 10 feet6 10 feet 10 feet 10 feet For SI units: 1 foot = 304.8 mm
Notes:
1 Including porches and steps, whether covered or uncovered, breezeways, roofed porte cocheres, roofed patios, carports, covered walks, covered driveways, and similar structures or appurtenances. 2 See Section 312.3.
3 Drainage piping shall clear domestic water supply wells by not less than 50 feet (15 240 mm). This distance shall be permitted to be reduced to not less than 25 feet (7620 mm) where the drainage piping is constructed of materials approved for use within a building.
4 Plus 2 feet (610 mm) for each additional 1 foot (305 mm) of depth in excess of 1 foot (305 mm) below the bottom of the drain line. (See Section H 601.0)
5 See Section 720.0.
6 For parallel construction -- For crossings, approval by the Health Department shall be required. 7 These minimum clear horizontal distances shall also apply between disposal fields, seepage pits, and the mean high-tide line.
8 Where disposal fields, seepage pits, or both are installed in sloping ground, the minimum horizontal distance between any part of the leaching system and ground surface shall be 15 feet (4572 mm). 9 Where special hazards are involved, the distance required shall be increased as may be directed by the Authority Having Jurisdiction.
10 The septic tank and seepage pit shall not be within the protected zone of an oak tree as defined by Section 22.14.150 of Title 22 – Planning and Zoning – of the Los Angeles County Code.

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SECTION 16. Table H 201.1(1) of Appendix H is hereby amended to read as follows:

TABLE H 201.1(1)
CAPACITY OF SEPTIC TANKS1, 2, 3, 4, 5

SINGLE-FAMILY

DWELLINGS -

NUMBER OF

BEDROOMS

MULTIPLE DWELLING UNITS

OR APARTMENTS - ONE

BEDROOM EACH
OTHER USES: MAXIMUM

FIXTURE UNITS SERVED
PER TABLE 702.1

MINIMUM SEPTIC TANK

CAPACITY
(gallons)
1 or 2 — 15 750
3 — 20 1000
4 2 units 25 1200
5 or 6 3 33 1500
— 4 45 2000
— 5 55 2250
— 6 60 2500
— 7 70 2750
— 8 80 3000
— 9 90 3250
— 10 100 3500
For SI units: 1 gallon = 3.785 L
Notes:
1 Extra bedroom, 150 gallons (568 L) each.
2 Extra dwelling units over 10:250 gallons (946 L) each. 3 Extra fixture units over 100: 25 gallons (94.6 L) per fixture unit. 4 Septic tank sizes in this table include sludge storage capacity and the connection of domestic food waste disposers without further volume increase.
5 Applies to mobile homes not installed in a mobile home park.

SECTION 17. Table H 201.1(2) of Appendix H is hereby amended to read as follows:

TABLE H 201.1(2)

DESIGN CRITERIA OF FIVESIX TYPICAL SOILS

TYPE OF SOIL REQUIRED SQUARE FEET OF

LEACHING
AREA PER 100 GALLONS

MAXIMUM ABSORPTION

CAPACITY IN

GALLONS PER SQUARE FEET
OF
LEACHING AREA FOR A 24

HOUR PERIOD
Coarse sand or gravel 20 5.0
Fine sand 25 4.0
Sandy loam or sandy clay 40 2.5
Sandy clay 60 1.66
Clay with considerable sand or gravel 90 1.1
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Clay with small amount of sand or gravel 120 0.8
For SI units: 1 square foot = 0.0929 m2, 1 gallon = 3.785 L, 1 gallon per square foot = 40.7 L/m2 SECTION 18. Table H 201.1(3) of Appendix H is hereby amended to read as follows:

TABLE H 201.1(3)

LEACHING AREA SIZE BASED ON SEPTIC TANK CAPACITY

REQUIRED SQUARE FEET OF LEACHING
AREA
PER 100 GALLONS SEPTIC TANK CAPACITY
(square feet per 100 gallons)

MAXIMUM SEPTIC TANK SIZE ALLOWABLE
(gallons)
20-25 7500
40 5000
60 3500
90 35003000
120 30002500
For SI units: 1 square foot per 100 gallons = 0.000245 m2/L, 1 gallon = 3.785 L

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SECTION 19. Table H 201.1(4) of Appendix H is hereby amended to read as follows:

TABLE H 201.1(4)
ESTIMATED WASTE SEWAGE FLOW RATES1, 2, 3

TYPE OF OCCUPANCY GALLONS PER DAY
Airports (per employee) 15
Airports (per passenger) 5
Auto washers – check with equipment manufacturer -
Bowling alleys – with snack bar only (per lane) 75
Campground – with central comfort station (per person) 35 Campground – with flush toilets - no showers (per person) 25 Camps (day) – no meals served (per person) 15
Camps (summer and seasonal camps) – (per person) 50
Churches – sanctuary (per seat) 5
Churches – with kitchen waste (per seat) 7
Dance halls – (per person) 5
Factories – no showers (per employee) 25
Factories – with showers (per employee) 35
Factories – with cafeteria (per employee) 5
Hospitals – (per bed) 250
Hospitals – kitchen waste only (per bed) 25
Hospitals – laundry waste only (per bed) 40
Hotels – no kitchen waste (per bed) 60
Institutions – resident (per person) 75
Nursing home – (per person) 125
Rest home – (per person) 125
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Laundries – self-service with minimum 10 hours per day
(per wash cyclemachine) 30050
Laundries – commercial check with manufacturer’s
specification -
Motel (per bed space) 50
Motel – with kitchen (per bed space) 60
Offices – (per employee) 20
Parks – mobile homes (per space) 250
Parks (picnic) – with toilets only (per parking space) 20 Parks (recreational vehicles) – without water hook-up
(per space) 75
Parks (recreational vehicles) – with water and sewer
hook-up (per space) 100
Restaurants – cafeteria (per employeeseat) 5020
Restaurants – with toilet waste (per customer) 7
Restaurants – with kitchen waste (per meal) 6
Restaurants – with kitchen waste disposable service
(per meal) 2
Restaurants – with garbage disposal (per meal) 1
Restaurants – with cocktail lounge (per customer) 2
Schools staff and office (per person) 20
Schools – elementary (per student) 15
Schools – intermediate and high (per student) 20
Schools – with gym and showers (per student) 5
Schools – with cafeteria (per student) 3
Schools (boarding) – total waste (per person) 100
Service station – with toilets for 1st bay 1000
Service station – with toilets for each additional bay 500 Stores – (per employee) 20
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Stores – with public restrooms (per 10 square feet of
floor space) 1
Swimming pools – (per person) 10
Theaters – auditoriums (per seat) 5
Theaters – with drive-in (per space) 10
For SI units: 1 square foot = 0.0929 m2, 1 gallon per day 3.785 L/day
Notes:
1 Sewage disposal systems sized using the estimated waste/sewage flow rates shall be calculated as follows:
(a) Waste/sewage flow, up to 1500 gallons per day (5678 L/day) Flow x 1.5 = septic tank size
(b) Waste/sewage flow, over 1500 gallons per day (5678 L/day) Flow x 0.75 + 1125 = septic tank size
(c) Secondary system shall be sized for total flow per 24 hours. 21 See Section H 201.1.
32 Because of the many variables encountered, it is not possible to set absolute values for waste/sewage flow rates for all situations. The designer should evaluate each situation and, where figures in this table need modification, they should be made with the concurrence of the Authority Having Jurisdiction.

SECTION 20. Section H 301.1 is hereby amended to read as follows:

H 301.1 General.
. . .
(3) No excavation for a leach line or leach bed shall be located within 5 feet (1524 mm) of thegroundwater table nor to a depth where sewage is capable of contaminatingmay contaminate the underground water stratum that is useable for domestic purposes.

Exception: In areas where the records or data indicate that the groundwaters are grossly degraded, the 5 foot (1524 mm) separation requirement shall be permitted to be reduced by the Authority Having JurisdictionWhen approved by the Authority Having Jurisdiction, this distance may be reduced to 5 feet (1524 mm) from ocean water. The applicant shall supply evidence of groundwater depth to the satisfaction of the Authority Having Jurisdiction.

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(4) The minimum effective absorption area in any seepage pit shall be calculated as the excavated sidewall area below the inlet exclusive of any hardpan, rock, clay, or other impervious formations. The minimum required area of porous formation shall be provided in one or more seepage pits. No excavation shall extend within 10 feet (3048 mm) of thegroundwater table nor to a depth where sewage is capable of contaminatingmay contaminate the underground water stratum that is useable for domestic purposes.

Exception: In areas where the records or data indicate that the groundwaters are grossly degraded, the 10 foot (3048 mm) separation requirement shall be permitted to be reduced by the Authority Having JurisdictionWhen approved by the Authority Having Jurisdiction, this distance may be reduced to 5 feet (1524 mm) from ocean water.
. . .

SECTION 21. Section H 401.3 is hereby amended to read as follows:

H 401.3 Absorption Rates. Where a percolation test is required, the proposed system shall have the capability to absorb a quantity of clear water in a 24- hour period equal to at least five times the liquid capacity of the proposed septic tank. nNo private disposal system shall be permitted to serve a building if that test shows the absorption capacity of the soil is less than 0.83 gallons per square foot (gal/ft2) (33.8 L/m2) or more than 5.12 gal/ft2 (208.6 L/m2) of leaching area per 24 hours. Where the percolation test shows an absorption rate greater than 5.12 gal/ft2 (208.6 L/m2) per 24 hours, a private disposal system shall be permitted where the site does not Enclosure C 238
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overlie groundwaters protected for drinking water supplies, a minimum thickness of 2 feet (610 mm) of the native soil below the entire proposed system is replaced by loamy sand, and the system design is based on percolation tests made in the loamy sand.

SECTION 22. Section H 601.5 is hereby amended to read as follows:

H 601.5 Distribution Boxes. Where two or more drain lines are installed, an approved distribution box of sufficient size to receive lateral lines shall be installed at the head of each disposal field. The inverts of outlets shall be level, and the invert of the inlet shall be not less than 1 inch (25.4 mm) above the outlets. Distribution boxes shall be designed to ensure equal flow and shall be installed on a level concrete slab in natural or compacted soil. Distribution boxes shall be coated on the inside with a bituminous coating or other approved method acceptable to the Authority Having Jurisdiction.

SECTION 23. Section H 601.8 is hereby amended to read as follows:

H 601.8 Dosing Tanks. Where the quantity of sewage exceeds the amount that is permitted to be disposed in 500 lineal feet (152.4 m) of leach line, a dosing tank shall be used. Dosing tanks shall be equipped with an automatic siphon or pump that discharges the tank once every 3 or 4 hours. The tank shall have a capacity equal to 60 to 75 percent of the interior capacity of the pipe to be dosed at one time.

Where the total length of pipe exceeds 1000 lineal feet (305 m), the dosing tank shall be provided with two siphons or pumps dosing alternately and each serving one-half of the leach fieldAutomatic syphon or dosing tanks shall be installed when required or as Enclosure C 239
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permitted by the Authority Having Jurisdiction.

SECTION 24. Section H 701.2 is hereby amended to read as follows:

H 701.2 Multiple Installations. Multiple seepage pit installations shall be served through an approved distribution box or be connected in series using watertight connection laid on undisturbed or compacted soil. The outlet from the pit shall have. When connected in series, the effluent shall leave each pit through an approved vented leg fitting extending not less than 12 inches (305 mm) below the inlet fittingdownward into such existing pit and having its outlet flow line at least 6 inches below the inlet. All pipe between pits shall be laid with approved watertight joints.

SECTION 25. Section H 1001.1 is hereby amended to read as follows:

H 1001.1 Inspection. Inspection requirements shall comply with the following:
(1) Applicable provisions of Section 105.0104.0 of this cCode and this aAppendix shall be required. Plans shall be required in accordance with Section 103.3102.1 of this cCode.
. . .
(5) Disposal fields and seepage pits shall not be installed in uncompacted fill.

SECTION 26. Section H 1101.6 is hereby added to read as follows:

H 1101.6 Excavation. No excavation for an abandoned sewer or sewage facility shall be left unattended at any time, unless the permittee shall have first provided a suitable and adequate barricade to assure public safety.

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SECTION 27. Appendix M is hereby amended to be Appendix T to read as follows:

APPENDIX MT

SWIMMING POOLS
MT 1.0 Swimming pool waste water shall be disposed of as hereinafter set forth in this Section and the type of disposal proposed shall be approved by the Authority Having Jurisdiction prior to the commencement of any work. A means of disposal of the total contents of the pool (periodic emptying) without surface runoff shall be established to the satisfaction of the Authority Having Jurisdiction.

MT 2.0 The following are legal methods of swimming pool waste water disposal.
(1) To a public sewer.
(2) On the property if the property is large enough to ensure that runoff will not encroach on abutting property.
(3) To a tank truck.
(4) In the case where none of the above can be accomplished, alternate methods of disposal acceptable to the State Regional Water Quality Control Board (SRWQCB) may be used. Prior to discharge, the swimming pool water must be tested by the owner to insureensure that it is within all water quality standards established by the SRWQCB. Contact Department of Public Works, Environmental Programs Division for information.

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MT 3.0 No direct connection shall be made between any storm drain, sewer, drainage system, drywell or subsoil irrigation line and any line connected to a swimming pool.

MT 4.0 Waste water from any filter, scum gutter overflow, pool emptying line or similar apparatus or appurtenance when discharging to any part of a drainage system, shall be provided with a three (3) inch (76.2 mm) trap.

MT 5.0 Except as provided in Section MT 6.0, the discharge outlet terminal from any pool or filter shall be protected from backflow by an air gap at least six (6) inches (152.4 mm) above the flood rim of the receptor.

MT 6.0 No scum gutter drain, overflow drain, backwash discharge drain, or pool emptying line shall enter any receptor below the rim unless the pool piping at its deepest point, the bottom of the filters, and the bottom of the scum gutter drain trough or overflow inlets are at least six (6) inches (152.4 mm) above the overflow rim of the receptor.

MT 7.0 A positive point of potable water supply to each swimming pool shall be established and shall be installed as required by Chapter 6 of this Code.

MT 8.0 Plans for other than private swimming pools shall be approved by the Health Officer before any water supply or waste discharge permit is issued.

Note: The forgoing applies only to outdoor swimming, bathing, or wading pools. Plans and specifications for all indoor installations shall be submitted to the Authority Having Jurisdiction for approval prior to the commencement of any work, and all piping, Enclosure C 242
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equipment and construction shall be equal to the types prescribed in the Installation Requirements of this Code for indoor work.

MT 9.0 All new swimming pools constructed or installed in Fire Zone 4 or in a Very High Fire Hazard Severity Zone and having a capacity of 5000 gallons or more shall have a minimum four (4) inch diameter drain and discharge line connected to a draft hydrant, the type, location, and installation of which shall be approved by the chief of the fire department. Materials used for the discharge line shall be as approved in this Code for potable water systems except that brass, cast iron, galvanized wrought iron, and copper shall not be used. If PVC is used, it shall be a minimum of Schedule

40. Exception: Swimming pools constructed or installed with the bottom of the pool more than 15 feet below the proposed draft hydrant connection elevation, measured vertically, need not be provided with a draft hydrant system.

To identify that pool draft system, an appropriate sign (as designated by the fire department) including the location of the swimming pool shall be posted on the pool safety fence and/or at the draft hydrant location.

MT 10.0 For one- and two-family dwellings, any new permanently installed outdoor in-ground swimming pool or spa shall be equipped with an automatic cover. For irregular-shaped pools where it is infeasible to cover 100 percent of the pool due to its irregular shape, the largest possible area of the pool (minimum 80 percent) shall be covered. For additions and alterations, non-automatic covers shall be accepted.

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SECTION 28. Appendix S is hereby amended to be Appendix U and to read as follows:

APPENDIX SU

SOLAR THERMAL ENERGY SYSTEMS
SU 1.0 General.

In addition to the requirements of this Appendix, the provisions of this Code and Title 29 – Mechanical Code – of the Los Angeles County Code shall apply to the erection, installation, alteration, relocation, replacement, addition to, use, maintenance and repair of solar thermal energy systems, including, but not limited to, equipment and appliances intended to utilize solar thermal energy for water heating and swimming pool heating.

SU 2.0 Definitions.

For the purpose of this Appendix, certain terms, words, phrases, and their derivatives shall be construed as set forth in this Section. Whenever terms are not defined, their ordinary dictionary meaning shall apply.

Absorber. That part of the solar collector that receives the incident radiation energy.

Absorptance. The collecting of heat, measured as percent of total radiation available.

Ambient Temperature. Surrounding temperature.

Anchors. See Supports.

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Antifreeze. An additive used in water-based heat transfer fluids to decrease the freezing temperature of the fluids and protect hydronic systems from freezing.

Appliance. A device that utilizes an energy source to produce light, heat, power, refrigeration, or air conditioning. This definition also includes electric storage or tankless water heaters.

Aperture. The maximum projected area of a solar collector through which the unconcentrated solar radiant energy is admitted.

Area, Absorber. The total projected heat transfer area from which the absorbed solar irradiation heats the transfer media.

Area, Aperture. The maximum projected area of a solar collector through which the unconcentrated solar radiant energy is admitted.

Automatic. That which provides a function without the necessity of human intervention.

Auxiliary Heating System. Equipment using non-solar energy sources to supplement or back up the output provided by a solar thermal energy system.

Closed Loop System. A system where the fluid is enclosed in a piping system that is not vented to the atmosphere.

Collector. See Solar Collector.

Collector Cover (Glazing). The material covering the aperture to provide thermal and environmental protection.

Collector System. That section of the solar collector system that includes the collector and piping or ducts from the collector to the storage system.

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Combustible Liquid. A liquid having a flash point at or above 100°F (38°C).

Combustible liquids shall be divided into the following classifications:
(1) Class II liquids having a flash point above 100°F (38°C) and below 140°F (60°C).
(2) Class IIIA liquids having a flash point at or above 140°F (60°C) and below 200°F (93°C).
(3) Class IIIB liquids having a flash point at or above 200°F (93°C).

The classifications of combustible liquids do not include compressed gases or cryogenic fluids.

Concentrating Solar Collector. A solar collector that uses reflectors, lenses, or other optical elements to concentrate the radiant energy passing through the aperture onto an absorber of which the surface area is smaller than the aperture area.

Corrosion. The gradual degradation and destruction of metals and other natural and synthetic materials typically resulting from and/or electrochemical reactions with their environment including, but not limited to, weathering, dissolution, and direct photochemical attack.

Cover, Collector (Glazing). The material covering the aperture to provide thermal and environmental protection.

Design Pressure. The maximum allowable pressure for which a specific part of a system is designed.

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Design Temperature. The maximum allowable continuous or intermittent temperature for which a specific part of a solar energy system is designed to operate safely and reliably.

Distribution System. That section of the solar energy system from the storage system to the point of use.

Drainback System. A closed loop system which allows gravity draining of the heat transfer fluid into lower portions of the solar loop under prescribed circumstances.

Draindown (Drainback). An active solar energy system in which the fluid in the solar collector is drained from the solar energy system under prescribed circumstances.

Energy Collector Fluid. That fluid used to transfer energy from the collector to the storage system or point of use.

Energy Storage Fluid (or Media). That fluid (or media) used in the storage container for storing collected energy.

Energy Transfer Fluid. That fluid used within a closed system either from the collector to the storage system or from the storage system to the point of use.

Essentially Nontoxic Transfer Fluid. Fluid generally recognized as safe by the Food and Drug Administration (FDA) as food grade.

External Auxiliary Heating. Auxiliary heating device located outside the storage. The heat is transferred to the storage by direct or indirect charging via a charge loop.

Fail-Safe Freeze Protection. A freeze-protection method that does not rely on the activation or continued operation of any mechanical or electrical component.

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Flammable Liquid. Any liquid that has a flash point below 100°F (38°C), and has a vapor pressure not exceeding 40 psi (276 kPa) at 100°F (38°C). Flammable liquids shall be known as Class I liquids and shall be divided into the following classifications:
(1) Class IA liquids having a flash point below 73°F (23°C) and a boiling point below 100°F (38°C).
(2) Class IB liquids having a flash point below 73°F (23°C) and a boiling point at or above 100°F (38°C).
(3) Class IC liquids having a flash point at or above 73°F (23°C) and below 100°F (38°C).

Flash Point. The minimum temperature corrected to a pressure of 14.7 psi (101 kPa) at which a test flame causes the vapors of a portion of the sample to ignite under the conditions specified by the test procedures and apparatus. The flash point of a liquid shall be determined in accordance with ASTM D 56, ASTM D 93, or ASTM D 3278.

Freeze Protection. Any method for protecting solar thermal systems from damage due to freezing conditions where installed in locations where freezing ambient temperature conditions exist.

Freeze Protection, Fail-Safe. A freeze-protection method that does not rely on the activation or continued operation of any mechanical or electrical component.

Heat Exchanger. A device that transfers heat from one medium to another.

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Heat Transfer Medium. The medium used to transfer energy from the solar collectors to the thermal storage or load.

Immersed Heat Exchanger. Heat exchanger, which is completely surrounded with the fluid in the storage tank.

Instantaneous Efficiency. The amount of energy removed by the transfer fluid per gross collector area, during a specified time period, divided by the total solar radiation incident on the collector per unit area during the same test period, under steady state or quasi-steady state.

Integral Collector Storage. A solar thermal heating system that uses a solar collector that has all or most of its heat transfer medium inside the collector.

Langelier Saturation Index. A formula used to measure water balance or mineral saturation control of pool, spa, or hot tub water. Total alkalinity, calcium hardness, pH, water temperature, and total dissolved solids are measured, given a factor, and calculated to determine whether water has a tendency to be corrosive or scale forming.

Open Loop System. A system where the fluid is enclosed in a piping system that is vented to the atmosphere.

Out-Gassing. As applied to thermal energy, the thermal process by which materials expel gas.

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Passive Solar Systems. As used in these requirements, are solar energy systems that utilize elements of a building, without augmentation by mechanical components such as blowers or pumps, to provide for the collections, storage, or distribution of solar energy for heating, cooling, or both.

Rock Storage. A bin, basement, or other container filled with rock to act as an energy reservoir for a solar energy system.

Solar Collector. A device used to absorb energy from the sun.

Solar Energy System. A configuration of equipment and components to collect, convey, store, and convert the sun's energy for a purpose.

Solar Energy System Components. Any appliance, assembly, device, equipment, or piping used in the conversion of solar energy into thermal energy for service water heating, pool water heating, space heating and cooling, and electrical service.

Solar Thermal Energy System. See Solar Thermal System.

Solar Thermal System. A complete assembly of subsystems which convert solar energy into thermal energy and utilize this energy for service water heating, pool water heating, space heating and cooling purposes.

Storage Temperature. Temperature of the storage medium.

Supports. Supports, hangers, and anchors are devices for properly supporting and securing pipe, fixtures, and equipment.

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Thermal Energy. The amount of sensible heat energy stored within a material or fluid. The product of the mass, specific thermal capacity, and temperature increase/decrease of the material or fluid. Also known as sensible heat energy.

Thermal Storage. A tank or vessel used in a solar thermal, hydronic, or geothermal system, in which thermal energy is stored.

Thermosiphon. The natural circulation of fluids due to temperature differential.

Total Alkalinity. The sum of all alkaline minerals in the water that is primarily in bicarbonate form, but also as sodium, calcium, magnesium, potassium carbonates, and hydroxides. It is a measure of the water's ability to resist changes in pH.

SU 3.0 Permits Required.

It shall be unlawful for a person, firm, or corporation to construct, install, alter, repair, replace, or remodel a solar thermal energy system regulated by this Code or cause the same to be done without first obtaining a separate permit for each separate system or interconnected set of systems as specified in Section 103.0 of this Code.

SU 4.0 Plans and Specifications.

Plans, engineering calculations, diagrams, and other data shall be submitted in one or more sets with each application for a permit. Where required by the Authority Having Jurisdiction, the plans, computations, diagrams, specifications, and other data shall be prepared by, and the solar thermal energy system designed by, an engineer, an architect, or both, who shall be licensed by the state to practice as such.

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Exception: The submission of plans, calculations, or other data may be waived where the Authority Having Jurisdiction determines that the nature of the work applied for is such that reviewing of plans is not necessary to obtain compliance within the Code.

SU 5.0 Installation.

SU 5.1 Listed Appliances. Except as otherwise provided in this Code, the installation of appliances regulated by this Code shall be in accordance with the conditions of the listing. The appliance installer shall leave the manufacturer's installation and operating instructions attached to the appliance. Clearances of listed appliances from combustible materials shall be as specified in the listing or on the rating plate.

SU 5.2 Standards. Standards listed or referred to in this Appendix or other provisions of this Code cover materials that will conform to the requirements of this Code, where used in accordance with the limitations prescribed in this Code and their listing. Where a standard covers materials of various grades, weights, quality, or configurations, the portion of the listed standard that is applicable shall be used. Design and materials for special conditions or materials not provided for herein may be permitted as authorized by Section 301.3. A list of standards that appear in specific sections of this Appendix are referenced in Table SU 18.1. A list of additional standards, publications, practices, and guides that are not referenced in specific sections of this Appendix appear in Table SU 18.2. The documents indicated in Table SU 18.2 shall be permitted in accordance with Section 301.3.

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SU 6.0 Inspection and Testing.

SU 6.1 General. Solar thermal energy systems for which a permit is required by this Code shall be inspected by the Authority Having Jurisdiction. No solar thermal energy system or portion thereof shall be covered, concealed, or put into use until it first has been tested, inspected, and approved as prescribed in this Code.

Neither the Authority Having Jurisdiction nor the jurisdiction shall be liable for expense entailed in the removal or replacement of material required to permit inspection. Solar thermal energy systems regulated by this Code shall not be connected to the water, the energy fuel supply, or the sewer system until authorized by the Authority Having Jurisdiction. Installation of a solar thermal energy system shall comply with other parts of this Code, including Section 104.0.

SU 6.2 Required Inspection. New solar thermal energy system work and such portions of existing systems as affected by new work, or changes, shall be inspected by the Authority Having Jurisdiction to ensure compliance with the requirements of this Code and to ensure that the installation and construction of the solar thermal energy system is in accordance with approved plans. The Authority Having Jurisdiction shall make the following inspections and other such inspections as necessary. The permittee or the permittee's authorized agent shall be responsible for the scheduling of such inspections as follows:
(1) Underground inspection shall be made after trenches or ditches are excavated and bedded, piping installed, and before backfill is put in place.

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(2) Rough-in inspection shall be made prior to the installation of wall or ceiling membranes.
(3) Final inspection shall be made upon completion of the installation.

SU 6.3 Testing. Solar thermal energy systems shall be tested and approved as required by this Code or the Authority Having Jurisdiction.

SU 6.3.1 Piping. The piping of the solar thermal system shall be tested with water, air, a heat transfer medium, or as recommended by the manufacturer's instructions, except that plastic pipe shall not be tested with air. The Authority Having Jurisdiction shall be permitted to require the removal of plugs, etc., to ascertain where the pressure has reached all parts of the system.

SU 6.3.2 System Requirements. Prior to the installation of insulation and startup, a solar thermal system, including piping, collectors, heat exchangers, and other related equipment, shall be tested and proved airtight.

SU 6.3.2.1 Direct (Open Loop) Systems. Direct (open loop) systems shall be tested under a water pressure not less than one and one-half times the maximum design operating pressure or 150 pounds force per square inch (psi) (1034 kPa), whichever is more. Systems shall withstand the test without leaking for a period of not less than 15 minutes.

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SU 6.3.2.2 Indirect (Closed Loop) Systems. Indirect (closed loop) systems shall be hydrostatically tested at one and one-half times the maximum designed operating pressure in accordance with the manufacturer's installation instructions. Systems shall withstand the test without leaking for a period of not less than 15 minutes.

SU 6.3.3 Test Pressure for Storage Tanks. The test pressure for storage tanks that are subject to water pressure from utility mains (with or without a pressure reducing valve) shall be two times the working pressure but not less than 300 psi (2068 kPa).

SU 6.3.3.1 Pressure Type. Pressure-type storage tanks exceeding 15 psi (103 kPa) shall be tested in accordance with ASME BPVC Section VIII.

Pressure-type storage tanks not exceeding 15 psi (103 kPa) shall be hydrostatically tested at one and one-half times the maximum design operating pressure.

SU 6.3.3.2 Atmospheric-Type. Atmospheric-type thermal storage tanks shall be tested by filling with water for a period of 24 hours prior to inspection and shall withstand the test without leaking. No thermal storage tank or portion thereof shall be covered or concealed prior to approval.

SU 6.3.4 Connection to Service Utilities. No person shall make connections from a source of energy or fuel to a solar thermal energy system or equipment regulated by this Code and for which a permit is required until approved by the Authority Having Jurisdiction. No person shall make connection from a water-supply line nor shall they connect to a sewer system regulated by this Code and for which a Enclosure C 255
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permit is required until approved by the Authority Having Jurisdiction. The Authority Having Jurisdiction shall be permitted to authorize temporary connection of the solar thermal energy system equipment to the source of energy or fuel for the purpose of testing the equipment.

SU 7.0 Water Heating Systems.

SU 7.1 Solar Water Heating System. Solar water heating systems shall be in accordance with IAPMO S1001.1 or ICC 900/SRCC 300. Where solar collectors are capable of being isolated from the remainder of the system, a suitable pressure relief valve shall be installed in the isolatable section.

SU 7.2 Auxiliary Heating System. An auxiliary heating system shall be installed in conjunction with the solar thermal system and shall be adequate to provide service in the absence of solar thermal energy input. An auxiliary heating system that utilizes electricity as the energy source shall be in accordance with Section SU 15.0. Auxiliary heating systems that utilize solid fuel or fuel gas as the energy source shall be in accordance with Title 29 – Mechanical Code – of the Los Angeles County Code.

SU 8.0 Abandonment.

SU 8.1 General. An abandoned solar thermal energy system or part thereof shall be disconnected from remaining systems, drained, plugged, and capped in a manner satisfactory to the Authority Having Jurisdiction.

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SU 8.2 Storage Tank. An underground water storage tank that has been abandoned or discontinued otherwise from use in a solar thermal energy system shall be completely drained and filled with earth, sand, gravel, concrete, or other approved material or removed in a manner satisfactory to the Authority Having Jurisdiction.

SU 9.0 Tanks.

SU 9.1 Storage Tanks.

SU 9.1.1 Plans. Plans for tanks shall be submitted to the Authority Having Jurisdiction for approval, unless listed by an approved listing agency. Such plans shall show dimensions, reinforcing, structural calculations, and such other pertinent data as required by the Authority Having Jurisdiction.

SU 9.1.2 Atmospheric Tanks. Atmospheric storage tanks shall be vented to the atmosphere and installed in accordance with the manufacturer's installation instructions.

SU 9.1.2.1 Overflow. Gravity tanks shall be installed with an overflow opening of not less than 2 inches in diameter. The openings shall be above ground and installed with a screened return bend.

SU 9.1.2.2 Makeup Water. Makeup water from a potable water system to an atmospheric tank shall be protected by an air gap.

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SU 9.1.2.3 Draining. An overflow shall be provided for an atmospheric tank. The overflow shall be provided with a means of drainage in accordance with Section 303.0 of this Code. The overflow for an atmospheric tank containing nonpotable water shall be emptied into an approved container.

SU 9.1.3 Prefabricated Storage Tanks. Prefabricated tanks shall be listed by an approved agency and labeled.

SU 9.1.4 Pressure Vessels. A pressure-type storage tank exceeding an operating pressure of 15 psi (103kPa) shall be constructed in accordance with ASME BPVC Section VIII.1. Fiber-reinforced plastic storage tanks shall be constructed in accordance with ASME BPVC Section X.

SU 9.1.5 Devices. Devices attached to or within a tank shall be accessible for repair and replacement.

SU 9.1.5.1 Safety Devices. Pressure-type thermal storage tanks shall be installed with a listed combination temperature and pressure relief valve in accordance with Section SU 14.3.1. The temperature setting shall not exceed 210°F (99°C) and the pressure setting shall not exceed 150 percent of the maximum designed operating pressure of the system, or 150 percent of the established normal operating pressure of the piping materials, or the labeled maximum operating pressure of a pressure-type storage tank, whichever is less. The pressure and temperature setting shall not exceed the pressure and temperature rating of the tank or as recommended by the tank manufacturer.

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Storage tanks and bottom fed tanks connected to a water heater shall be designed to withstand vacuum induced pressure, or shall be provided with a vacuum relief in accordance with Section SU 14.3.4. The vacuum relief valve shall be installed at the top of the tank and shall have an operating pressure not to exceed 200 psi (1379 kPa) and a temperature rating not to exceed 250°F (121°C). The size of such vacuum relief valves shall have a minimum rated capacity for the equipment served.

This Section shall not apply to pressurized captive air diaphragm or bladder tanks.

SU 9.1.6 Separate Storage Tanks. For installations with separate storage tanks, a pressure relief valve and temperature relief valve or combination thereof shall be installed on both the main storage tank and auxiliary tank.

SU 9.1.6.1 Isolation Valves. Storage tanks shall be provided with isolation valves for servicing.

SU 9.1.7 Underground Storage Tanks. Tanks shall be permitted to be buried underground where designed and constructed for such installation.

SU 9.1.8 Tank Covers. Tank covers shall be structurally designed to withstand anticipated loads and pressures in accordance with the manufacturer’s instructions.

SU 9.1.9 Drainage Pan. Where water heater, boiler, or other thermal storage tank is installed in an attic, attic-ceiling assembly, floor-ceiling assembly, or floor subfloor assembly where damage could result from a leaking water heater, boiler or tank, a watertight pan of corrosion-resistant materials shall be installed beneath the water Enclosure C 259
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heater, boiler, or tank, with not less than 3/4 of an inch (20 mm) diameter drain to an approved location. Such pan shall be not less than 1 ½ inches (38mm) in depth.

SU 9.1.10 Storage Tank Construction and Materials.

SU 9.1.10.1 Construction. Storage tanks shall be constructed of durable materials not subject to excessive corrosion or decay and shall be watertight.

Each such tank shall be structurally designed to withstand anticipated loads and pressures and shall be installed level and on a solid bed.

SU 9.1.10.2 Concrete. The walls and floor of each poured-in-place, concrete tank shall be monolithic. The exterior walls shall be double-formed so as to provide exposure of the exterior walls during the required water test. The compressive strength of a concrete tank wall, top and covers, or floor shall be not less than 2500 pounds-force per square inch (psi) (lb/in2) (1.7236 E+04, kPa). Where required by the Authority Having Jurisdiction, the concrete shall be sulfate resistant (Type V Portland Cement).

SU 9.1.10.3 Metal Tanks. Metal tanks shall be welded, riveted and caulked, brazed, bolted, or constructed using a combination of these methods.

SU 9.1.10.4 Filler Metal. Filler metal used in brazing shall be nonferrous metal or an alloy having a melting point above 1000°F (538°C) and below that of the metal joined.

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SU 9.1.10.5 Insulation. Tank insulation shall have a thermal resistance not less than as shown in Table SU 9.1.10.5. The temperature difference shall be calculated as the difference between the design operating temperature of the tank and the temperature of the surrounding air, or soil where the tank is installed underground.

Where such data is not available, a temperature difference of 50°F (28°C) shall be used.

TABLE SU 9.1.10.5
TEMPERATURE DIFFERENCE(°F)

THERMAL RESISTANCE
(R)[°F•h•ft2 /(Btu)]
50 6
100 12
150 18
200 24
250 30
For SI units: °C = °F(0.5555556), 1 degree Fahrenheit hour square foot per British thermal unit = [0.176 (m2•K)/W], 1 British thermal unit inch per degree Fahrenheit hour square feet = 0.1441 W/(m•K)* Based on thermal conductivity (k) of 0.20 [(Btu•inch)/(°F•h•ft2)] (0.03 W/(m•K)
SU 9.2 Expansion Tanks.

SU 9.2.1 Where Required. An expansion tank shall be installed in a solar thermal energy system as a means for controlling increased pressure caused by thermal expansion. Expansion tanks shall be of the closed type and securely fastened to the structure. Tanks shall be rated for the pressure of the system. Supports shall be capable of carrying twice the weight of the tank filled with water without placing strain on the connecting piping.

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Solar thermal energy systems incorporating hot water tanks or fluid relief columns shall be installed to prevent freezing under normal operating conditions.

Exception: An engineered fluid expansion storage system shall be permitted to incorporate fluid storage in vessels open to the atmosphere. Storage tanks and components for such systems shall be constructed of non-corrosive materials, or the system fluid shall be treated to inhibit corrosion. [See Figure U 9.2.1(2) for an example of an engineered fluid expansion storage system which incorporates fluid storage in a vessel open to the atmosphere.]
FIGURE U 9.2.1(1)1,2

EXAMPLE OF A CLOSED-LOOP SYSTEM WITH

DIAPHRAGM TYPE EXPANSION TANK
(SIMPLIFIED SCHEMATIC)
Notes:
1 This schematic does not include all system components, and configurations may vary based on design. 2 A makeup supply may be provided using any type of fluid source. The makeup supply is not considered part of the closed-loop.

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FIGURE U 9.2.1(2)1,2

EXAMPLE OF AN ENGINEERED FLUID EXPANSION

STORAGE SYSTEM (ATMOSPHERIC)
(SIMPLIFIED SCHEMATIC)
Notes:
1 This schematic does not include all system components, and configurations may vary based on design. 2 The atmospheric expansion tank accommodates thermal expansion and, or contraction of the system fluid.

SU 9.2.2 Closed-Type Solar Thermal Energy Systems. Closedtype systems shall have an airtight tank or other approved air cushion that will be consistent with the volume and capacity of the system, and shall be designed for a hydrostatic test pressure of two and one-half times the allowable working pressure of the system. Expansion tanks for systems designed to operate at more than 30 poundsforce per square inch (psi) (207 kPa) shall comply with ASME BPVC Section VIII.1.

Provisions shall be made for draining the tank without emptying the system.

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SU 9.2.3 Minimum Capacity of Closed-Type Expansion Tanks.

The minimum capacity for a gravity-type hot water system expansion tank shall be in accordance with Table SU 9.2.3(1). The minimum capacity for a forced-type hot water system expansion tank shall be in accordance with Table SU 9.2.3(2) or Equation SU 9.2.3(1). The minimum capacity for diaphragm tanks shall be in accordance with Table SU 9.2.3(2) or Equation SU 9.2.3(2).

Equation SU 9.2.3(1)
Vt(forced type) =

Equation SU 9.2.3(2)
Vt(diaphram) =

Where:

C1 = 0.00041
C2 = 0.0466
Vt = Minimum volume of expansion tank, gallons (L)
Vs = Volume of system, not including expansion tank, gallons (L) t = Average operating temperature, °F (°C).

Pa = Atmospheric pressure, pounds per square inch (kPa) Pf = Fill pressure, pounds per square inch (kPa)
Po = Maximum operating pressure, pounds per square inch (kPa) For SI units: C1 = 0.000738, C2 = 0.03348, 1 gallon = 3.785 L, °C = (°F-32)/1.8, 1 pound per square inch = 6.8947 kPa
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TABLE SU 9.2.3(1)

EXPANSION TANK CAPACITIES FOR GRAVITY
HOT WATER SYSTEMS1
INSTALLED EQUIVALENT DIRECT RADIATION2
(square feet)

TANK CAPACITY
(gallons)
Up to 350 18
Up to 450 21
Up to 650 24
Up to 900 30
Up to 1100 35
Up to 1400 40
Up to 1600 2 to 30
Up to 1800 2 to 30
Up to 2000 2 to 35
Up to 2400 2 to 40
For SI units: 1 gallon = 3.785 L, 1 square foot = 0.0929 m2 Notes:
1 Based on a two-pipe system with an average operating water temperature of 170°F (77°C), using cast-iron column radiation with a heat emission rate of 150 British thermal units per square foot hour [Btu/(ft2•h)] (473 W/m2) equivalent direct radiation. 2 For systems exceeding 2400 square feet (222.9 m2) of installed equivalent direct water radiation, the required capacity of the cushion tank shall be increased on the basis of 1 gallon (4 L) tank capacity per 33 square feet (3.1 m2) of additional equivalent direct radiation.

TABLE SU 9.2.3(2)

EXPANSION TANK CAPACITIES FOR FORCED
WATER SYSTEMS1
SYSTEM VOLUME2
(gallons)

TANK CAPACITY DIAPHRAGM
TYPE
(gallons)

TANK CAPACITY
(gallons)
100 9 15
200 17 30
300 25 45
400 33 60
500 42 75
1000 83 150
2000 165 300
For SI units: 1 gallon = 3.785 L
Notes:
1 Based on an average operating water temperature of 195°F (91°C), a fill pressure of 12 psig (83 kPa), and an operating pressure of not more than 30 psig (207 kPa). 2 Includes volume of water in boiler, radiation, and piping, not including expansion tank.

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SU 10.0 Solar Collectors.

SU 10.1 General. Frames and braces exposed to the weather shall be constructed of materials for exterior locations, and protected from corrosion or deterioration, in accordance with the requirements of the Authority Having Jurisdiction.

SU 10.1.1 Construction. Collectors shall be designed and constructed to prevent interior condensation, out-gassing, or other processes that will reduce the transmission properties of the glazing, reduce the efficiency of the insulation, or otherwise adversely affect the performance of the collector.

SU 10.1.2 Flat Plate Collector Glass. Flat plate collector glass shall be tempered.

SU 10.1.3 Plastic. Plastic used in collector and other parts of the solar thermal energy system construction shall be installed in accordance with the manufacturer's installation instructions.

SU 10.1.4 Listing. Collectors that are manufactured as a complete component shall be listed or labeled by an approved listing agency in accordance with ICC 901/SRCC 100, UL 1279, or equivalent standard.

SU 10.1.5 Air Collectors. Materials exposed within air collectors shall be noncombustible or shall have a flame spread index not to exceed 25 and a smoke developed index not to exceed 50 where tested as a composite product in accordance with ASTM E 84 or UL 723.

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SU 10.1.5.1 Testing. Materials used within an air collector shall not smoke, smolder, glow, or flame where tested in accordance with ASTM C 411 at temperatures exposed to in service. In no case shall the test temperature be less than 250°F (121°C).

SU 10.2 Solar Collector Installation.

SU 10.2.1 General. Solar collectors shall be ballasted or anchored to roof structures or other surfaces in accordance with the manufacturer's installation instructions and Title 26 – Building Code – of Los Angeles County. Collectors shall be mounted to minimize the accumulation of debris. Connecting pipes shall not be used to provide support for a solar collector.

SU 10.2.2 Roof Installations. Anchors secured to and through a roofing material shall be made to maintain the water integrity of the roof covering. Roof drainage shall not be impaired by the installation of collectors. Solar collectors that are not an integral part of the roofing system shall be installed to preserve the integrity of the roof surface.

U 10.2.3 Protection Against Decay. Wood shall not be used in the construction of collector or system mounting.

SU 10.2.34 Above Or On The Roof. Collectors located above or on roofs, and functioning as building components, shall not reduce the required fireresistance and fire-retardance classification of the roof covering materials.

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Exceptions:
(1) Collectors located on one- and two-family dwellings. (2) Collectors located on buildings not exceeding three stories in height or 9,000 square feet (836.13 m2) total floor area, or both, provided:
(a) The collectors are noncombustible.
(b) Collectors with plastic covers have noncombustible sides and bottoms, and the total area covered and the collector shall not exceed the following:
(i) Plastic CC1 – 33 1/3 percent of the roof area;
(ii) Plastic CC2 – 25 percent of the roof area; and
(c) Collectors with plastic film covers having a thickness of not more than 0.010 of an inch (0.25 mm) shall have noncombustible sides and bottoms, and the total area covered by the collector shall not exceed 33 1/3 percent of the roof area.

SU 10.2.45 Ground Installations. Solar collectors shall terminate above finished grade to avoid obstruction by vegetation, snow, or ice. The supporting columns shall extend below the frost line.

SU 10.2.56 Wall Mounted. Solar collectors mounted on a wall shall be secured and fastened in accordance with Section 313.0 of this Code.

SU 10.2.67 Access. Access shall be provided to collectors and components in an approved manner. A work space adjacent to collectors for maintenance and repair shall be provided in accordance with requirements of the Authority Having Jurisdiction.

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SU 10.2.78 Stagnation Condition. The collector and other parts of the solar thermal assembly shall be capable of withstanding stagnant conditions in accordance with the manufacturer's instructions where high solar flux and no flow occurs.

SU 10.2.89 Waterproofing. Joints between structural supports and buildings or dwellings, including penetrations made by bolts or other means of fastening, shall be made watertight with approved material.

SU 10.2.910 Fasteners. Mountings and fasteners shall be made of corrosion-resistant materials. Carbon steel mountings and fasteners shall be classified as noncorrosive in accordance with ASME SA194.

SU 10.2.1011 Combustible Materials. Solar thermal energy systems constructed with combustible materials shall not be located on or adjacent to construction required to be of noncombustible materials or in Very High Fire Hazard Severity Zone as defined in Title 32 - Fire Code – of the Los Angeles County Code, unless approved by the Authority Having Jurisdiction.

SU 10.2.1112 Orientation. Collectors shall be located and oriented in accordance with the manufacturer's installation instructions.

SU 10.3 Fire Safety Requirements.

SU 10.3.1 Building Components. Collectors that function as building components shall be in compliance with Title 26 – Building Code – of the Los Angeles County Code and Title 32 – Fire Code – of the Los Angeles County Code.

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SU 11.0 Hazardous Heat Transfer Medium for Solar Thermal Energy Systems. Heat-transfer mediums that are hazardous shall not be used in solar thermal energy systems, except where approved by the Authority Having Jurisdiction.

SU 11.1 Flash Points. The flash point of a heat-transfer medium shall be 50°F (10°C) or more above the design maximum temperature.

SU 11.2 Discharge. The collector, collector manifold, and manifold relief valve shall not discharge directly or indirectly into the building or toward an open flame or other source of ignition.

SU 12.0 Heat Exchangers.

SU 12.1 General. Solar thermal energy systems utilizing heat exchangers shall protect the potable water system from being contaminated by the heat transfer medium. Systems that incorporate a single-wall heat exchanger to separate potable water from the heat transfer fluid shall meet all of the following requirements:
(1) The heat transfer medium is either potable water or contains fluids recognized as safe by the Food and Drug Administration (FDA) as food grade. (2) A tag or label shall be securely affixed to the heat source with the word "CAUTION" and the following statements:
(a) The heat transfer medium shall be water or other nontoxic fluid recognized as safe by the FDA.
(b) The maximum operating pressure of the heat exchanger shall not exceed the maximum operating pressure of the potable water supply.

Enclosure C 270
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(3) The word "CAUTION" and the statements listed above shall have an uppercase height of not less than 0.120 of an inch (3.048 mm). The vertical spacing between lines of type shall be not less than 0.046 of an inch (1.168 mm). Lowercase letters shall be not less than compatible with the uppercase letter size specification.

Systems that do not comply with the requirements for a single-wall heat exchanger shall install a double-wall heat exchanger. Double-wall heat exchangers shall separate the potable water from the heat transfer medium by providing a space between the two walls vented to the atmosphere.

SU 13.0 Valves.

SU 13.1 General. Valves shall be rated for the operating temperature and pressures of the solar thermal energy system and shall be compatible with the type of heat transfer medium and piping materials. Valves shall be installed in accordance with this Section.

SU 13.2 Heat Exchanger. Shutoff valves and isolation valves shall be installed on the supply and return side of the heat exchanger.

Exception: Where a heat exchanger is an integral part of a boiler or is a part of a manufactured boiler and heat exchanger packaged unit, and is capable of being isolated from the hydronic system by supply and return valves.

SU 13.3 Pressure Vessels. Isolation valves shall be installed on connections to pressure vessels.

SU 13.4 Pressure Reducing Valves. Isolation valves shall be installed on both sides of a pressure reducing valve.

Enclosure C 271
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SU 13.5 Equipment, Components, and Appliances. Serviceable equipment, components, and appliances within the system shall have isolation valves installed upstream and downstream of such devices.

SU 13.6 Expansion Tanks. Isolation valves shall be installed at connections to non-diaphragm-type expansions tanks.

SU 13.7 Flow Balancing Valves. Where flow balancing valves are installed, such valves shall be capable of increasing or decreasing the amount of flow by means of adjustment.

SU 13.7.1 Location. Balancing valves shall be installed at the outlet of each group of collectors.

SU 13.8 Control Valves. An approved three-way valve shall be permitted to be installed for manual control systems. An approved electric control valve shall be permitted to be installed for automatic control systems. The installation and operation of automatic control valves shall comply with the manufacturer's instructions.

SU 13.8.1 Mixing or Temperature Control Valves. Where mixing or temperature control valves are installed, such valves shall be capable of obtaining the design water temperature and design flow requirements.

SU 13.9 Thermosiphoning. An approved type check valve shall be installed on liquid heat transfer piping to control thermosiphoning of heated liquids.

SU 13.10 Air Removal Device or Air Vents. Isolation valves shall be installed where air removal devices or automatic air vents are utilized to permit cleaning, inspection, or repair without shutting the system down.

Enclosure C 272
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SU 13.11 Closed Loop Systems. Closed loop systems, where hose bibbs or similar valves are used to charge or drain the system, shall be of loose key type; have valve outlets capped; or have handles removed where the system is operational.

SU 13.12 Fullway Valves. A fullway valve shall be installed in the following locations:
(1) On the water supply to a solar thermal energy system. (2) On the water supply pipe to a gravity or pressurized water tank. (3) On the water supply pipe to a water heater.

SU 13.13 Accessible. Required fullway or shutoff valves shall be accessible.

SU 14.0 Piping and Cross-connection Control For Solar Thermal Energy Systems.

SU 14.1 Cross Connection Control. No piping installation, or part thereof, shall be made in such a manner that it will be possible for used, unclean, polluted, or contaminated water, mixtures, or substances to enter a portion of the potable water system from a pipe, tank, receptor, or any other equipment by reason of backsiphonage, suction, or any other cause, either during normal use and operation thereof, or where such pipe, tank, receptor, or equipment is subject to pressure exceeding the operating pressure in the potable water system.

Enclosure C 273
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SU 14.2 Materials.

SU 14.2.1 Piping Materials. Piping, tubing, and fittings materials shall comply with Table SU 14.2. Joining methods shall be in accordance with Section 605.0.

Materials in contact with the heat transfer medium shall be approved for such use.

Galvanized steel shall not be used for solar thermal piping systems containing antifreeze. Black steel shall not be used in systems with entrapped or entrained air.

Unions between dissimilar metals shall comply with Sections 310.6 and 605.15. The material used shall be capable of withstanding the maximum temperature and pressure of the system.

SU 14.2.1.1 Plastic. Plastic used in the construction of a solar thermal system shall be installed in accordance with the manufacturer's installation instructions.

SU 14.2.1.2 Combustible Materials. Combustible materials shall not be located on or adjacent to construction required to be of noncombustible materials or in fire areas, unless approved by the Authority Having Jurisdiction.

SU 14.2.1.3 Adhesives. Adhesives used in a solar collector shall not vaporize at the design temperature and shall be identified and approved for the intended use.

SU 14.2.1.4 Potable Water. Materials in contact with potable water shall comply with NSF 61/ANSI/CAN 61. Piping in solar thermal systems designed to convey potable water shall be flushed and disinfected in accordance with this Code.

SU 14.2.1.5 Racks. Dissimilar metals used for racking shall be isolated to prevent galvanic corrosion. Paint shall not be used as a method of isolation.

Enclosure C 274
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SU 14.2.1.6 Fasteners. Mountings and fasteners shall be made of corrosion-resistant materials. Carbon steel mountings and fasteners shall be classified as noncorrosive in accordance with ASME SA194.

SU 14.2.2 Storage Tank Connectors. Flexible metallic storage tank connectors or reinforced flexible storage tank connectors connecting a storage tank to the piping system shall be in accordance with the applicable standards referenced in Table SU 18.1. Copper or stainless steel flexible connectors shall not exceed 24 inches (610 mm). PEX, PE-AL-PE, or PE-RT tubing shall not be installed within the first 18 inches (457 mm) of piping connected to a storage tank.

SU 14.2.2.1 Flexible Connectors. Listed flexible connectors shall be installed in readily accessible locations, unless otherwise indicated in the listing.

SU 14.3 Safety Devices.

SU 14.3.1 Pressure Relief Valves. Solar thermal energy system components containing pressurized fluids shall be protected against pressures exceeding design limitations with a pressure relief valve. Each section of the system in which excessive pressures are capable of developing shall have a relief device located so that a section cannot be isolated from a relief device. Pressure and temperature relief valves shall be installed in accordance with the terms of their listing and the manufacturer's installation instructions.

Enclosure C 275
HOA.105559019.8 55
TABLE SU 14.2

MATERIALS FOR SOLAR THERMAL SYSTEM, PIPING, TUBING, AND FITTINGS

MATERIAL STANDARDS

PIPING/TUBING FITTINGS
Copper/Copper Alloy
ASTM B42, ASTM B43, ASTM B75,
ASTM B88, ASTM B135, ASTM
B251*, ASTM B302, ASTM B447
ASME B16.15, ASME
B16.18, ASME B16.22, ASME
B16.23, ASME B16.24, ASME
B16.26, ASME B16.29,
ASME B16.51, ASSE 1061, ASTM
F3226, IAPMO PS 117
Steel
ASTM A53, ASTM A106, ASTM
A254
ASME B16.5, ASME
B16.9, ASME B16.11,
ASTM A420, ASTM
F3226, IAPMO PS 117
Gray Iron –– ASTM A126
Malleable Iron –– ASME B16.3
Chlorinated Polyvinyl Chloride
(CPVC)
ASTM D2846, ASTM F441, ASTM
F442, CSA B137.6
ASSE 1061, ASTM D2846, ASTM
F437, ASTM F438, ASTM F439,
ASTM F1970, CSA B137.6
Polyethylene (PE) ASTM D1693, ASTM D2513,
ASTM D2683, ASTM D2737, ASTM
D3035, ASTM D3350, ASTM F714,
ASTM F2165, AWWA C901, CSA
B137.1, NSF 358-1
ASTM D2609, ASTM D2683,
ASTM D3261, ASTM F1055, ASTM
F2165, CSA B137.1, NSF 358-1
Cross-Linked Polyethylene (PEX)
ASTM F876, ASTM F2165, ASTM
F3253, CSA B137.5, NSF
358-3
ASSE 1061, ASTM F877, ASTM
F1055, ASTM F1807, ASTM F1960,
ASTM F2080, ASTM F2098, ASTM
F2159, ASTM F2165, ASTM F2735,
ASTM F3253, ASTM F3347, ASTM
F3348, CSA B137.5, NSF 358-3
Polypropylene (PP) ASTM F2165, ASTM F2389, CSA
B137.11, NSF 358-2
ASTM F2165, ASTM F2389, CSA
B137.11, NSF 358-2
Polyvinyl Chloride (PVC) ASTM D1785, ASTM D2241, CSA
B137.3
ASTM D2464, ASTM
D2466, ASTM D2467,
ASTM F1970, CSA
B137.2, CSA B137.3
Raised Temperature Polyethylene
(PE-RT)
ASTM F2165, ASTM F2623, ASTM
F2769, CSA B137.18
ASSE 1061, ASTM D3261, ASTM
F1055, ASTM F1807, ASTM
F2159, ASTM F2165, ASTM
F2735, ASTM F2769, CSA
B137.18
Cross-Linked
Polyethylene/Aluminum/ CrossLinked Polyethylene (PEX-AL-PEX) ASTM F1281, ASTM F2165, CSA
B137.10
ASTM F1281, ASTM F1974, ASTM
F2165, ASTM F2434, CSA
B137.10
Polyethylene/Aluminum/Polyethylen
e (PE- AL-PE)
ASTM F1282, ASTM F2165, CSA
B137.9
ASTM F1282, ASTM F1974, ASTM
F2165, CSA B137.9
Stainless Steel ASTM A269, ASTM A312, ASTM
A554, ASTM A778
ASTM F1476, ASTM
F1548, ASTM F3226,
IAPMO PS 117
Chlorinated Polyvinyl
Chloride/Aluminum/ Chlorinated
Polyvinyl Chloride
(CPVC/AL/CPVC)
ASTM F2855 ASTM D2846
Note:
* Only Type K, L, or M shall be permitted to be installed.

Enclosure C 276
HOA.105559019.8 56

MATERIAL STANDARDS

PIPING/TUBING FITTINGS
Copper and Copper Alloys ASTM B42, ASTM B43, ASTM B75,
ASTM B88, ASTM B135, ASTM
B2512, ASTM B302, ASTM B447
ASME B16.15, ASME B16.18, ASME
B16.22, ASME B16.23, ASME
B16.24, ASME B16.26, ASME
B16.29,
ASME B16.51, ASSE 1061, ASTM
F3226, IAPMO/ANSI/CAN Z1117
Ductile Iron AWWA C115/A21.15, AWWA
C151/A21.51
AWWA C110/A21.101, AWWA
C153/A21.53
Steel ASTM A53, ASTM A106, ASTM
A254
ASME B16.5, ASME B16.9, ASME
B16.11, ASTM A420, ASTM F3226,
IAPMO IGC 353, IAPMO/ANSI/CAN
Z1117
Gray Iron –– ASTM A126
Malleable Iron –– ASME B16.3
Chlorinated Polyvinyl Chloride (CPVC) ASTM D2846, ASTM F441, ASTM F442, CSA B137.6
ASSE 1061, ASTM D2846, ASTM
F437, ASTM F438, ASTM F439,
ASTM F1970, CSA B137.6
Polyethylene (PE) ASTM D1693,
ASTM D2683, ASTM D2737, ASTM
D3035, ASTM D3350,
ASTM F714, ASTM F2165, AWWA
C901, CSA B137.1, NSF/ANSI 358-1
ASTM D2609, ASTM D2683, ASTM
D3261, ASTM F1055, ASTM F2165,
CSA B137.1, NSF/ANSI 358-1
Cross-Linked Polyethylene (PEX) ASTM F876, ASTM F2165, ASTM F3253, CSA B137.5, NSF/ANSI 358-
3 ASSE 1061, ASTM F877, ASTM
F1055, ASTM F1807, ASTM F1960,
ASTM F2080, ASTM F2098, ASTM
F2159, ASTM F2165, ASTM F2735,
ASTM F3253, ASTM F3347, ASTM
F3348, CSA B137.5,
NSF/ANSI 358-3
Polypropylene (PP) ASTM F2165, ASTM F2389, CSA
B137.11, NSF/ANSI 358-2
ASTM F2165, ASTM F2389, CSA
B137.11, NSF/ANSI 358-2
Polyvinyl Chloride (PVC) ASTM D1785, ASTM D2241, CSA
B137.3
ASTM D2464, ASTM D2466, ASTM
D2467, ASTM F1970, CSA B137.2,
CSA B137.3
Polyethylene of Raised Temperature
(PE-RT)
ASTM F2165, ASTM F2623, ASTM
F2769, CSA B137.18
ASSE 1061, ASTM D3261, ASTM
F1055, ASTM F1807, ASTM F2159,
ASTM F2165, ASTM F2735, ASTM
F2769, ASTM F3347, ASTM F3348,
CSA B137.18
Cross-Linked Polyethylene/Aluminum/
Cross-Linked Polyethylene (PEX-ALPEX)
ASTM F1281, ASTM F2165, CSA
B137.10
ASTM F1281, ASTM F1974, ASTM
F2165, ASTM F2434, CSA B137.10
Polyethylene/Aluminum/Polyethylene
(PE-AL-PE)
ASTM F1282, ASTM F2165, CSA
B137.9
ASTM F1282, ASTM F1974, ASTM
F2165, CSA B137.9
Stainless Steel ASTM A269, ASTM A312, ASTM
A554, ASTM A778
ASTM F1476, ASTM F1548, ASTM
F3226, IAPMO IGC 353,
IAPMO/ANSI/CAN Z1117
Chlorinated Polyvinyl
Chloride/Aluminum/ Chlorinated
Polyvinyl Chloride (CPVC/AL/CPVC)
ASTM F2855 ASTM D2846
Notes: 1 Ductile and gray iron.
2 Only Type K, L, or M shall be permitted to be installed.

Enclosure C 277
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SU 14.3.2 Pressurized Vessels. Pressurized vessels shall be provided with overpressure protection by means of a listed pressure relief valve installed in accordance with the manufacturer's installation instructions.

SU 14.3.3 Discharge Piping. The discharge piping serving a temperature relief valve, pressure relief valve, or combination of both shall have no valves, obstructions, or means of isolation and comply with the following:
(1) The discharge pipe shall equal the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down.
(2) Materials shall be rated at not less than the operating temperature of the system and approved for such use or shall comply with ASME A112.4.1. (3) The discharge pipe shall discharge independently by gravity through an air gap into the drainage system or outside of the building with the end of the pipe not exceeding 2 feet (610 mm) and not less than 6 inches (152 mm) above the ground and pointing downwards.
(4) The discharge pipe shall discharge in such a manner that does not cause personal injury or structural damage.
(5) No part of such discharge pipe shall be trapped or subject to freezing. (6) The terminal end of the pipe shall not be threaded. (7) Discharge from a relief valve into a water heater pan is prohibited. (8) The discharge termination point shall be readily observable.

Enclosure C 278
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SU 14.3.4 Vacuum Relief Valves. System components that are subjected to a vacuum while in operation or during shutdown shall be protected with vacuum relief valves. Where the piping configuration, equipment location, and valve outlets are located below the storage tank elevation, the system shall be equipped with a vacuum relief valve at the highest point.

SU 14.3.5 Temperature Regulation. Where a system is capable of providing potable water at temperatures that exceed 140°F (60°C), a thermostatic mixing valve that is in accordance with ASSE 1017 shall be provided to limit the water supplied to the potable hot water distribution system to a temperature of 140°F (60°C) or less.

SU 14.4 Protection of System Components.

SU 14.4.1 Materials. System components in contact with heat-transfer mediums shall be approved for such use. Components installed outdoors shall be resistant to ultraviolet radiation.

SU 14.4.2 Corrosion. Solar thermal energy systems and components subject to corrosion shall be protected in an approved manner. Metal parts exposed to atmospheric conditions shall be of corrosion-resistant material.

SU 14.4.3 Mechanical Damage. Portions of a solar thermal energy system installed where subjected to mechanical damage shall be guarded against such damage by being installed behind approved barriers or, where located within a garage, be elevated or located out of the normal path of a vehicle, defined as a line perpendicular to the garage vehicle opening to the back wall extending 36 inches Enclosure C 279
HOA.105559019.8 59
(914 mm) to either side along the back wall and to a height of 48 inches (1219 mm).

Protective barriers for energy storage systems (ESS) shall be designed to resist, deflect, or visually deter vehicle impact in accordance with Section U 14.4.3.1 through Section U 14.4.3.3. (See Figure U 14.4.3).

Exception: Where the clear height of the vehicle garage opening is equal to or less than 90 inches (2286 mm), ESS installed at least 36 inches (914 mm) above the finished floor shall not be subject to vehicle impact protection requirements.

U 14.4.3.1 Bollards. Where installed, construction of bollards shall be in accordance with one of the following:
(1) 48 inches (1219 mm) in length by 3 inches (76 mm) in diameter, Schedule 80 steel pipe embedded in a concrete pier 12 inches (305 mm) deep and 6 inches (152 mm) in diameter, with 36 inches (914 mm) of pipe exposed, filled with concrete, and spaced at intervals not exceeding 60 inches (1524 mm). Each bollard shall be located not less than 6 inches (152 mm) from an ESS. (2) LQFKHV

PP
LQKHLJKWE\LQFKHV
PP
௖LQGLDPHWHU
Schedule VWHHOSLSHIXOO\ZHOGHGWRDQLQFK
PP
E\LQFK
PP
E\»RI
an inch (6.4 mm) thick steel plate and bolted to a concrete floor by means of four ½ inch (12.7 mm) concrete anchors with not less than 3 inches (76 mm) of embedment.

Spacing shall not exceed 60 inches (1524 mm), and each bollard shall be located not less than 6 inches (152 mm) from the ESS.

Enclosure C 280
HOA.105559019.8 60
(3) Pre-manufactured steel pipe bollards shall be filled with concrete and anchored in accordance with the manufacturer's installation instructions. Spacing between bollards shall not exceed 60 inches (1524 mm). Each bollard shall be located not less than 6 inches (152 mm) from the ESS.

U 14.4.3.2 Wheel Barriers. Where installed, construction of wheel barriers shall be in accordance with one of the following:
(1) 6 inches (152 mm) in height by 6 inches (152 mm) in width, wheel stop made of concrete or polymer, anchored to the concrete floor at intervals of not less than 36 inches (914 mm) and located not less than 54 inches (1372 mm) from the ESS. Not less than two ½ inch (12.7 mm) diameter concrete anchors with 3 inches (76 mm) of embedment per wheel stop shall be used. Spacing between wheel stops shall not exceed 36 inches (914 mm).
(2) Pre-manufactured wheel stops shall be anchored in accordance with the manufacturer's installation instructions.

U 14.4.3.3 Other Approved Methods. Protective barriers installed 24 inches (610 mm) above grade and designed to resist a 2000 pound-force (8896 N) impact in the direction of vehicle travel shall be permitted.

Enclosure C 281
HOA.105559019.8 61
Figure U 14.3.3

PROTECTIVE BARRIERS FOR ESS
Enclosure C 282
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SU 14.4.4 Freeze Protection. Unless designed for such conditions, solar thermal energy systems and components that contain liquid as the heat transfer medium shall be protected from freezing, by means of fail-safe freeze protection in accordance with this Section, where the ambient temperature may be less than 46°F (8°C).

SU 14.4.4.1 Antifreeze. Antifreeze shall be used in accordance with the solar thermal system manufacturer’s instructions.

SU 14.4.4.2 Drainback. Drainback systems shall drain by gravity and shall be permitted to be installed in applications where the ambient temperature may not be less than -60°F (-51°C).

SU 14.4.4.3 Integral Collector Storage. Integral collector storage systems shall be permitted to be installed in applications where the ambient temperature may not be less than 23°F (-5°C) and the duration of below-freezing episodes exceeding 18 hours. Exposed piping in a solar thermal energy system shall be protected with insulation having a thermal resistance of not less than R-5.0.

SU 14.4.4.4 Indirect Thermosiphon. Indirect thermosiphon systems shall be permitted to be installed in applications where the ambient temperature may not be less than 23°F (-5°C). Exposed piping in a solar thermal energy system shall be protected with insulation having a thermal resistance of not less than R-5.

SU 14.4.4.5 Air Heating Systems. Air solar heating systems shall be permitted to be used in accordance with the manufacturer's instructions.

Enclosure C 283
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SU 14.4.4.6 Labeling. A label indicating the method of freeze protection for the system shall be attached to the system in a visible location.

SU 14.4.4.7 Piping. Fittings, pipe slope, and collector shall be designed to allow for manual gravity draining and air filling of solar thermal energy system components and piping. 3LSHVORSHIRUJUDYLW\GUDLQLQJVKDOOEHQRWOHVVWKDQ»LQFK per foot (20.8 mm/m) of horizontal length. Collector header pipes or absorber plate riser tubes internal to the collector shall be sloped in accordance with the manufacturer's instructions. Where a means to drain the system is provided, a drain valve shall be installed.

SU 14.4.5 Water Hammer Protection. The flow of the hydronic piping system shall be designed to prevent water hammer.

U 14.4.6 Heat Transfer Fluid Quality. Heat transfer fluids used in closed-loop hydronic systems shall be in accordance with IAPMO/ANSI H1001.1.

U 14.4.6.1 Ethylene Glycol. Ethylene glycol shall not be used in oneand two-unit residential systems. In existing systems, where ethylene glycol is used, there shall be no direct or permanent potable water connections. Where a temporary potable water connection is required, a backflow preventer shall be installed.

SU 14.4.67 Heat Transfer Fluid. Solar thermal piping shall be identified with an orange background with black uppercase lettering, with the words "CAUTION:

HEAT TRANSFER FLUID, DO NOT DRINK." Each solar thermal energy system shall be identified to designate the medium being conveyed. The minimum size of the letters and length of the color field shall comply with Table SU 14.4.67.

Enclosure C 284
HOA.105559019.8 64
Each outlet on the solar thermal piping system shall be posted with black uppercase lettering as follows:
"CAUTION: HEAT TRANSFER FLUID, DO NOT DRINK."
TABLE SU 14.4.67

MINIMUM LENGTH OF COLOR FIELD AND SIZE OF LETTERS

OUTSIDE DIAMETER OF PIPE OR

COVERING
(inches)

MINIMUM LENGTH OF COLOR
FIELD
(inches)

MINIMUM SIZE OF LETTERS
(inches)
½ to 1¼ 8 ½
1½ to 2 8 ¾
2½ to 6 12 1¼
8 to 10 24 2½
Over 10 32 3½
For SI units: 1 inch = 25.4 mm
U 14.4.8 Identification of Chemical Additives. In systems where chemical additives are used, documentation including the following information shall be readily accessible and maintained onsite:
(1) Concentrations
(2) Maintenance requirements
(3) Maintenance log
(4) Safety data sheet (SDS)
SU 14.4.79 Insulation.

SU 14.4.79.1 General. The temperature of surfaces within reach of building occupants shall not exceed 140°F (60°C) unless the surfaces are protected by insulation. Where sleeves are installed, the insulation shall continue full size through them. Coverings and insulation used for piping shall be of material approved for the operating temperature of the system and the installation environment. Where installed Enclosure C 285
HOA.105559019.8 65
in a plenum, the insulation, jackets and lap-seal adhesives, including pipe coverings and linings, shall have a flame spread index not to exceed 25 and a smoke-developed index not to exceed 50 where tested in accordance with ASTM E84 or UL 723.

SU 14.4.79.2 Heat Loss. Insulation shall be installed on interconnecting solar and hot water piping. The final 5 feet (1524 mm) of the cold water supply line, or the entire length where less than 5 feet (1524 mm), shall be insulated. The insulation thickness shall be in accordance with Table S 14.4.7.3(1) or Table S 14.4.7.3(2), or the insulation installedshall have an R-value of not less than R-2.6 degree Fahrenheit hour square foot per British thermal unit (°F•h•ft2/Btu) (R-0.46 m2•K/W). Piping, storage tanks, and circulating air ductwork shall be insulated. Ductwork and piping shall be permitted to not be insulated where exposed in conditioned spaces, and the heat loss from such ducts or piping does not otherwise contribute to the heating or cooling load within such space.

Exception: Low temperature, aboveground piping installed for swimming pools, spas, and hot tubs in accordance with the manufacturer's installation instructions unless such piping is located within a building.

SU 14.4.79.3 Piping. Pipes and fittings, other than unions, flanges, or valves, shall be insulated. Insulation material shall be approved for continuous operating temperatures of not less than 220°F (104°C). [See Table S 14.4.7.3(1) and Table S 14.4.7.3(2)].

Enclosure C 286
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TABLE S 14.4.7.3(1)

MINIMUM PIPE INSULATION
PS
inches)
IPE O.D.
inches)
I

NSULATION
I.D.
(i
nches)
INSULATION O.D.
(inches)

INSULATION NOMINAL THICKNESS
(inches)*
.5 .5 .5 .5
»2
.84
0 .86 .84 .36 .88 .00 .00 .62 .62 .62 .62 0.75 1.75
»4
.05
1 .07 .06 .36 .88 .00 .00 .62 .62 .62 .62 0.75 1.75
.315
1 .33 .32 .88 .50 .50 .56 .62 .62 .62 .62 0.75 1.75
1»4 .660
1 .68 .66 .28 .50 .00 .56 .62 .62 .62 .62 0.75 1.75
1»2 .900
1 .92 .78 .50 .00 .00 .62 .62 .62 .62 0.75 1.75 2.75
.375
2 .41 .42 .98 .50 .56 .62 .62 .62 .62 0.75 1.75 2.75
1»2 .875
2 .91 .88 .48 .00 .62 .62 .62 .62 0.75 1.75 2.75 4.00
.500
3 .53 .50 .96 .56 .62 .62 .62 .62 0.75 1.75 2.75 4.00
1»2 .000
4 .03 .96 .56 .62 .62 .62 .62 0.75 1.75 2.75 2.75 4.00
.500
4 .53 .56 .58 .62 .62 .62 .62 0.75 1.75 2.75 4.00 5.00
Enclosure C 287
HOA.105559019.8 67
.625
6 .70 .80 .12 .62 .62 0.75 1.75 2.75 4.00 5.00 6.00 7.00 For SI units: 1 inch = 25 mm
* Thickness values are applicable for calcium silicate, cellular foam plastics, cellular glass, mineral fiber, and perlite preformed insulation materials
TABLE S 14.4.7.3(2)

STANDARD TUBING INSULATION THICKNESS
T

UBE SIZE
(
inches)
T
UBE O.D.
(
inches)
INS
ULATION I.D.
(inc
hes)
INSULATION O.D.
(inches)

INSULATION NOMINAL THICKNESS
(inches)*
.5
2 2
.5
3 .5
4 4
.5
5 3
»8
0 .500

0.5 2 .38 .50
4 .50
5 .56 .62
- - - -
1 »2
0 .625

0.6 4 .88 .50
4 .50
5 .56 .62
- - - -
3 »4
0 .875

0.8 9 .88 .00 .00
6 .62 .62
8 .62
9 .62
1 0.75
1 1.75
1 1
.125

1.1 4 .88 .00 .00
6 .62 .62
8 .62
9 .62
1 0.75
1 1.75
1 1»4
1 .375

1.3 9 .50 .50 .56
6 .62 .62
8 .62
9 .62
1 0.75
1 1.75
1 1»2
1 .625

1.6 4 .50 .50 .56
6 .62 .62
8 ,62
9 .62
1 0.75
1 1.75
2 2
.125

2.1 6 .00 .00 .62
7 .62 .62
9 .62
1 0.75
1 1.75
1 2.75
2 1»2
2 .625

2.6 6 .50 .56 .62
7 .62 .62
9 .62
1 0.75
1 1.75
1 2.75
Enclosure C 288
HOA.105559019.8 68
3 3
.125

3.1 6 .00 .61 .62
8 .62 .62
1 0.75
1 1.75
1 2.75
1 4.00
3 1»2
3 .625

3.6 6 .56 .62 .62
8 .62 .62
1 0.75
1 1.75
1 2.75
1 4.00
4 4
.125

4. 16 .62 .62
8 .62
9 .62
1 0.75
1 1.75
1 2.75
1 4.00
1 5.00
5 5
.125

5. 16 .62 .62
9 .62
1 0.75
1 1.75
1 2.75
1 4.00
1 5.00
1 6.00
6 6
.125

6. 20 .62 .62
1 0.75
1 1.75
1 2.75
1 4.00
1 5.00
1 6.00
1 7.00
For SI units: 1 inch = 25 mm
* Thickness values are applicable for calcium silicate, cellular foam plastics, cellular glass, mineral fiber, and perlite preformed insulation materials.

SU 14.4.79.4 Fittings. Fittings shall be insulated with mitered sections, molded fittings, insulating cement, or flexible insulation.

SU 14.4.79.5 Installation. Insulation shall be finished with a jacket or facing with the laps sealed with adhesives or staples so as to secure the insulation on the pipe. Insulation jacket seams shall be on the underside of the piping and shall overlap in accordance with the manufacturer's installation instructions. Joints and seams shall be sealed with a sealant that is approved for both the material and environmental conditions. In lieu of jackets, molded insulation shall be permitted to be secured with 16 gauge galvanized wire ties not exceeding 9 inches (229 mm) on center.

Enclosure C 289
HOA.105559019.8 69
SU 14.4.79.5.1 Exterior Applications. Insulation for exterior applications shall be finished with an approved jacket, coating, or facing with the surfaces and laps sealed. Jacketing, coating, facing, and tape used for exterior applications shall be designed for such use. Where flexible insulation is used, it shall be wrapped and sealed against water penetration. Insulation used for exterior applications shall be resistant to extreme temperatures, UV exposure, and moisture.

SU 15.0 Specific Requirements.

SU 15.1 Electrical.

SU 15.1.1 Wiring. Electrical connections, wiring, and devices shall be installed in accordance with NFPA 70. Electrical equipment, appliances, and devices installed in areas that contain flammable vapors or dusts shall be of a type approved for such environment.

SU 15.1.2 Controls. Required electrical, mechanical, safety, and operating controls shall be listed or labeled by a listing agency. Electrical controls shall be of such design and construction as to be suitable for installation in the environment in which they are located.

SU 15.2 Flow Directions. Flow directions shall be permanently affixed on the solar thermal energy system.

SU 15.3 Attic Installations. An attic space in which solar energy system components are installed shall comply with Section 508.4 of this Code.

Enclosure C 290
HOA.105559019.8 70
SU 15.4 Connections to Drainage System Required. Receptors, drains, appurtenances, and appliances, used to receive or discharge liquid waste, shall be connected to the drainage system of the building or premises in accordance with the requirements of this Code.

SU 15.5 Dry Storage Systems.

SU 15.5.1 Waterproofing. The containment structure for dry thermal storage systems shall be constructed in an approved manner to prevent the infiltration of water or moisture.

SU 15.5.2 Detecting Water Intrusion. The containment structure shall be capable of fully containing spillage or moisture accumulation that occurs. The structure shall have a means, such as a sight glass, to detect spillage or moisture accumulation, and shall be fitted with a drainage device to eliminate spillage.

SU 15.5.3 Rock as Storage Material. Systems utilizing rock as the thermal storage material shall use clean, washed rock that is free of organic material.

SU 15.5.4 Odor and Particulate Control. Thermal storage materials and containment structures, including interior protective coating, shall not impart toxic elements, particulate matter, or odor to areas of human occupancy.

SU 15.6 Heat Pumps. Heat pumps shall be in compliance with Table S 15.6, as applicable. Heat pumps shall also be listed and labeled in accordance with UL 1995 or UL 60335-2-40. Heat pumps shall be fitted with a means to indicate that the compressor is locked out. comply with UL 1995 or UL 60335-2-40. Air-source heat pumps shall also comply with AHRI 210/240. In addition, ground-source heat pumps Enclosure C 291
HOA.105559019.8 71
shall comply with AHRI/ASHRAE/ISO 13256-1 for water-to-air heat pumps and AHRI/ASHRAE/ISO 13256-2 for water-to-water heat pumps. Heat pumps shall be fitted with a means to indicate that the compressor is locked out.

TABLE S 15.6

TYPE OF HEAT PUMP STANDARDS
Water-to-Air AHRI/ASHRAE/ISO 13256-1
Water-to-Water AHRI/ASHRAE/ISO 13256-2
Air Source AHRI 210/240
SU 16.0 Solar Thermal Energy Systems for Swimming Pool, Spas, and Hot Tubs.

SU 16.1 Water Chemistry. Where water from a swimming pool, spa, or hot tub is heated by way of circulation through solar collectors, the chemistry of such water shall comply with the requirements of Section SU 16.2 and shall be filtered in accordance with Section SU 16.3 and Section SU 16.3.1 of this Code.

SU 16.2 Parameters. Parameters for chemicals used within a swimming pool, spa, or hot tub shall be in accordance with Table SU 16.2.

TABLE SU 16.2

WATER CHEMISTRY

PARAMETER ACCEPTABLE RANGE
Calcium hardness
200 – 400 parts per million (ppm)
Langelier Saturation Index 0 (+ or - 0.3 acceptable)
pH 7.2 – 7.8
TDS < 1500 ppm
Total alkalinity 80 – 120 ppm
For SI Units: 1 part per million = 1 mg/L
SU 16.3 Filter. A filter shall be provided to remove debris from the water entering the solar loop.

Enclosure C 292
HOA.105559019.8 72
Exception: A solar swimming pool, spa, or hot tub heating system with a heat exchanger.

SU 16.3.1 Location. A filter shall be located upstream of a pump used to direct water to solar collectors.

SU 16.4 Corrosion Resistant. Glazed solar collectors made of copper shall not be used for solar pool, spa, or hot tub heating.

Exception: Where a heat exchanger is provided between the collector circuit and the swimming pool, spa, or hot tub water.

SU 17.0 Certificate of Compliance. Upon completion of the solar thermal energy system, the permittee shall sign a Certificate of Compliance with this Code. The Certificate of Compliance shall also list the following information:
(1) Type of freeze protection;
(2) Mixing valve setting degrees Fahrenheit (º F);
(3) Subsystem working pressure (if applicable) pounds per square inch; (4) Subsystem test pressure (if applicable) pounds per square inch; (5) Heat exchanger make and model number (if applicable); (6) Circulating pump over temperature protection shut-off setting degrees Fahrenheit (º F) for one-tank systems where the water heater controls utilize fusible-link type over temperature protection.

This Certificate shall be posted in a conspicuous location at or near the water heater.

Enclosure C 293
HOA.105559019.8 73
SU 18.0 General.

SU 18.1 Referenced Standards. The standards listed in
Table SU 18.1 are referenced in various sections of this Appendix and shall be considered part of the requirements of this Code. The standards are listed herein by the standard number and effective date, the title and application. The application of the referenced standard(s) shall be as specified in Section SU 5.2.

SECTION 29. Table S 18.1 is hereby deleted and replaced by Table U 18.1 to read as follows:

TABLE S 18.1

REFERENCED STANDARDS

STANDARD NUMBER STANDARD
TITLE

APPLICATION
AHRI 210/240-2017 Performance Rating of Unitary Air-conditioning & Airsource Heat Pump Equipment Air-Source Heat Pumps
AHRI 870-2016 Performance Rating of Direct Geoexchange Heat Pumps Equipment

AHRI/ASHRAE/ISO
13256-1-1998 (R2012)
Water-Source Heat Pumps – Testing and Rating for
Performance – Part 1: Water-to-Air and Brine-to-Air Heat Pumps
Water-Source Heat
Pumps

AHRI/ASHRAE/ISO
13256-2-1998 (R2012)
Water-Source Heat Pumps – Testing and Rating for
Performance – Part 2: Water-to-Water and Brine-to-Water Heat Pumps
Water-Source Heat
Pumps
ASHRAE 34-2019 Designation and Safety Classification of Refrigerants Refrigerant Classifications
ASHRAE 194-2017 Method of Test for Direct-Expansion Ground-Source Heat Pumps
Ground-Source Heat
Pumps
ASME A112.1.2-2012
(R2017)
Air Gaps in Plumbing Systems (for Plumbing Fixtures and Water-Connected Receptors)
Backflow Protection
ASME A112.1.3-2000
(R2015)
Air Gap Fittings for Use with Plumbing Fixtures,
Appliances, and Appurtenances
Backflow Protection
ASME A112.4.1-2009
(R2019)
Water Heater Relief Valve Drain Tubes Discharge Piping
ASME B1.20.1-2013
(R2018)
Pipe Threads, General Purpose (Inch) Joints
ASME B16.3-2016 Malleable Iron Threaded Fittings: Classes 150 and 300 Fittings ASME B16.5-2017 3LSH)ODQJHVDQG)ODQJHG)LWWLQJV
136»7KURXJK
NPS 24 Metric/Inch
Fittings
Enclosure C 294
HOA.105559019.8 74
ASME B16.9-2018 Factory-Made Wrought Buttwelding Fittings Fittings ASME B16.11-2016 Forged Fittings, Socket-Welding and Threaded Fittings ASME B16.15-2018 Cast Copper Alloy Threaded Fittings: Classes 125 and 250
Fittings
ASME B16.18-2018 Cast Copper Alloy Solder Joint Pressure Fittings Fittings ASME B16.22-2018 Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings
Fittings
ASME B16.23-2016 Cast Copper Alloy Solder Joint Drainage Fittings: DWV Fittings ASME B16.24-2016 Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves: Classes 150, 300, 600, 900, 1500, and 2500
Fittings
ASME B16.26-2018 Cast Copper Alloy Fittings for Flared Copper Tubes Fittings ASME B16.29-2017 Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings – DWV
Fittings
ASME B16.51-2018 Copper and Copper Alloy Press-Connect Pressure Fittings
Fittings
ASME BPVC Section
VIII.1-2019
Rules for Construction of Pressure Vessels Division 1 Miscellaneous ASME BPVC Section X2019 Fiber-Reinforced Plastic Pressure Vessels Pressure Vessel Construction,
Pressure Vessels
ASME SA194-2015 Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
Mounting
ASSE 1013-2011 Reduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection Backflow
Pre- venters
Backflow Prevention
ASSE 1017-2009 Temperature Actuated Mixing Valves for Hot Water Distribution Systems
Valves
ASSE 1061-2015 Push-Fit Fittings Fittings
ASSE 1079-2012 Dielectric Pipe Unions Fittings
ASTM A53/A53M-2018 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
Piping
ASTM A106/A106M2019a Seamless Carbon Steel Pipe for High-Temperature Service
Piping
ASTM A126-2004
(R2019)
Gray Iron Castings for Valves, Flanges, and Pipe
Fittings
Piping
ASTM A254/A254M-2012
(R2019)
Copper-Brazed Steel Tubing Piping
ASTM A269/A269M2015a (R2019) Seamless and Welded Austenitic Stainless Steel Tubing for General Service
Piping
ASTM A312/A312M-2019 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
Piping
ASTM A420/A420M2019a Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Fittings
ASTM A554-2016 Welded Stainless Steel Mechanical Tubing Piping Enclosure C 295
HOA.105559019.8 75
ASTM A778/A778M-2016 Welded, Unannealed Austenitic Stainless Steel Tubular Products
Piping
ASTM B32-2008 (R2014) Solder Metal Joints
ASTM B42-2015a Seamless Copper Pipe, Standard Sizes Piping ASTM B43-2015 Seamless Red Brass Pipe, Standard Sizes Piping ASTM B75/B75M-2019 Seamless Copper Tube Piping
ASTM B88-2016 Seamless Copper Water Tube Piping
ASTM B135/B135M-2017 Seamless Brass Tube Piping
ASTM B251/B251M-2017 General Requirements for Wrought Seamless Copper and Copper-Alloy Tube
Piping
ASTM B280-2019 Seamless Copper Tube for Air Conditioning and Refrigeration Field Service
Piping
ASTM B302-2017 Threadless Copper Pipe, Standard Sizes Piping ASTM B447-2012a Welded Copper Tube Piping
ASTM B813-2016 Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube
Joints
ASTM B828-2016 Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings
Joints
ASTM C411-2019 Hot-Surface Performance of High-Temperature Thermal Insulation
Duct Coverings and
Linings
ASTM D1693-2015 Environmental Stress-Cracking of Ethylene Plastics Piping ASTM D1785-2015e1 Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120
Piping
ASTM D2241-2015 Poly(Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)
Piping
ASTM D2464-2015 Threaded Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80
Fittings
ASTM D2466-2017 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40
Fittings
ASTM D2467-2015 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80
Fittings
ASTM D2513-2019 Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings
Piping
ASTM D2564-2012
(R2018)
Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic
Piping Systems
Joints
ASTM D2609-2015 Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe Fittings ASTM D2683-2014 Socket-Type Polyethylene Fittings for Outside DiameterControlled Polyethylene Pipe and Tubing Fittings ASTM D2737-2012a Polyethylene (PE) Plastic Tubing Piping Enclosure C 296
HOA.105559019.8 76
ASTM D2846/D2846M2019a
Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems
Piping
ASTM D3035-2015 Polyethylene (PE) Plastic Pipe (DR-PR) Based on Controlled Outside Diameter
Piping
ASTM D3139-2019 Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals
Joints
ASTM D3261-2016 Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
Fittings
ASTM D3350-2014 Polyethylene Plastics Pipe and Fittings Materials Piping ASTM E84-2019b Surface Burning Characteristics of Building Materials Miscellaneous ASTM F437-2015 Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80
Fittings
ASTM F438-2017 Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 40
Fittings
ASTM F439-2019 Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe Fittings, Schedule 80
Fittings
ASTM F441/F441M-2015 Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe, Schedules 40 and 80
Piping
ASTM F442/F442M-2019 Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR)
Piping, Plastic
ASTM F493-2014 Solvent Cements for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe and Fittings
Joints
ASTM F656-2015 Primers for Use in Solvent Cement Joints of Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings
Joints
ASTM F714-2013
(R2019)
Polyethylene (PE) Plastic Pipe (DR-PR) Based on
Outside Diameter
Piping
ASTM F876-2019a Crosslinked Polyethylene (PEX) Tubing Piping ASTM F877-2019 Crosslinked Polyethylene (PEX) Hot- and Cold-Water Distribution Systems
Piping
ASTM F1055-2016a Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked
Polyethylene (PEX) Pipe and Tubing
Fittings
ASTM F1281-2017 Crosslinked Polyethylene/ Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe
Piping
ASTM F1282-2017 Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Compo- site Pressure Pipe
Piping
ASTM F1476-2007
(R2019)
Performance of Gasketed Mechanical Couplings for Use
in Piping Applications
Fittings
ASTM F1548-2001
(R2018)
Performance of Fittings for Use with Gasketed
Mechanical Couplings Used in Piping Applications
Fittings
ASTM F1807-2019b Metal Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps, for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F1960-2019a Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) and
Polyethylene of Raised Temperature (PE-RT) Tubing
Fittings
ASTM F1970-2019 Special Engineered Fittings, Appurtenances or Valves for Use in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly
Piping
Enclosure C 297
HOA.105559019.8 77
ASTM F3347-2019a Metal Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked
Polyethylene (PEX) Tubing
Fittings
ASTM F3348-2019 Plastic Press Insert Fittings with Factory Assembled Stainless Steel Press Sleeve for SDR9 Cross-linked
Polyethylene (PEX) Tubing
Fittings
AWS A5.8M/A5.8-2019 Filler Metals for Brazing and Braze Welding Joints AWWA C901-2017 3RO\HWK\OHQH
3(
3UHVVXUH3LSHDQG7XELQJ»,Q

mm) Through 3 In. (76 mm), for Water Service
Piping
(Vinyl Chloride) (CPVC) Systems
ASTM F1974-2009
(R2015)
Metal Insert Fittings for
Polyethylene/Aluminum/Polyethylene and Crosslinked
Polyethylene/Aluminum/Crosslinked Polyethylene
Composite Pressure Pipe
Fittings
ASTM F2080-2019 Cold-Expansion Fittings with Metal Compression-Sleeves for Crosslinked Polyethylene (PEX) Pipe and SDR9
Polyethylene of Raised Temperature (PE-RT) Pipe
Fittings
ASTM F2098-2018 Stainless Steel Clamps for Securing SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of
Raised Temperature (PE-RT) to Metal Insert and Plastic
Insert Fittings
Fittings
ASTM F2159-2019a Plastic Insert Fittings Utilizing a Copper Crimp Ring, or Alternate Stainless Steel Clamps for SDR9 Cross-linked
Polyethylene (PEX) Tubing and SDR9 Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F2165-2019 Flexible Pre-Insulated Plastic Piping Fittings, Piping and Tubing
ASTM F2389-2019 Pressure-Rated Polypropylene (PP) Piping Systems Piping ASTM F2434-2019 Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing and
SDR9 Cross-linked Polyethylene/Aluminum/Cross-linked
Polyethylene (PEX-AL-PEX) Tubing
Fittings
ASTM F2620-2019 Heat Fusion Joining of Polyethylene Pipe and Fittings Joints ASTM F2623-2019 Polyethylene of Raised Temperature (PE-RT) Systems for Non-Potable Water Applications
Piping
ASTM F2735-2018 Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised
Temperature (PE-RT) Tubing
Fittings
ASTM F2769-2018 Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems
Piping, Fitting
ASTM F2855-2019 Chlorinated Poly (Vinyl Chloride)/Aluminum/Chlorinated Poly (Vinyl Chloride) (CPVC-AL-CPVC) Composite
Pressure Tubing
Piping, Plastic
ASTM F3226/F3226M2019 Metallic Press-Connect Fittings for Piping and Tubing Systems
Fittings
ASTM F3253-2019 Crosslinked Polyethylene (PEX) Tubing with Oxygen Barrier for Hot- and Cold-Water Hydronic Distribution
Systems
Piping, Fittings
Enclosure C 298
HOA.105559019.8 78
CSA B137.1-2017 Polyethylene (PE) Pipe, Tubing, and Fittings for ColdWater Pressure Services Piping CSA B137.2-2017 Polyvinylchloride (PVC) Injection-Moulded Gasketed Fittings for Pressure Applications
Fittings
CSA B137.3-2017 Rigid Polyvinylchloride (PVC) Pipe and Fittings for Pressure Applications
Piping, Fittings
CSA B137.5-2017 Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications
Piping
CSA B137.6-2017 Chlorinated Polyvinylchloride (CPVC) Pipe, Tubing, and Fittings for Hot- and Cold-Water Distribution
Systems
Piping, Fittings
CSA B137.9-2017 Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure-Pipe Systems
Piping
CSA B137.10-2017 Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Composite Pressure-Pipe
Systems
Piping
CSA B137.11-2017 Polypropylene (PP-R) Pipe and Fittings for Pressure Applications
Piping
CSA B137.18-2017 Polyethylene of Raised Temperature Resistance (PERT) Tubing Systems for Pressure Applications Piping, Fittings CSA C22.2 No. 108-2014
(R2019)
Liquid Pumps Pumps
CSA C448.1-2016 Design and Installation of Ground Source Heat Pump Systems for Commercial and Institutional Buildings
Ground-Source Heat
Pumps
CSA C448.2-2016 Design and Installation of Ground Source Heat Pump Systems for Residential and Other Small Buildings
Ground-Source Heat
Pumps
CSA/IGSHPA C448-2016 Design and Installation of Ground Source Heat Pump Systems for Commercial and Residential Buildings
Miscellaneous
CSA Z21.10.1-2019 Gas Water Heaters, Volume I, Storage Water Heaters with Input Ratings of 75,000 Btu Per Hour or Less (same as CSA 4.1)
Fuel Gas, Appliances
CSA Z21.10.3-2019 Gas-Fired Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above 75,000 Btu Per Hour,
Circulating and Instantaneous (same as CSA 4.3)
Fuel Gas, Appliances
IAPMO PS 117-2019 Press Connections Fittings
IAPMO S1001.1-2013
(R2019)
Design and Installation of Solar Water Heating Systems Solar Thermal Systems ICC 900/SRCC 300-2015 Solar Thermal System Standard Solar Thermal Systems ICC 901/SRCC 100-2015 Solar Thermal Collector Standard Collectors NFPA 70-2020 National Electrical Code Miscellaneous
NGWA-01-2014 Water Well Construction Standard Geothermal NSF 60-2019 Drinking Water Treatment Chemicals-Health Effects Backfill Enclosure C 299
HOA.105559019.8 79
NSF 61-2019 Drinking Water System Components - Health Effects Miscellaneous NSF 358-1-2017 Polyethylene Pipe and Fittings for Water-Based GroundSource "Geothermal" Heat Pump Systems Piping, Fittings NSF 358-2-2017 Polypropylene Pipe and Fittings for Water-Based GroundSource "Geothermal" Heat Pump Systems Piping, Fittings NSF 358-3-2016 Cross-Linked Polyethylene (PEX) Pipe and Fittings for Water- Based Ground-Source (Geothermal) Heat Pump
Systems
Piping, Fittings
NSF 358-4-2018 Polyethylene of Raised Temperature (PE-RT) Tubing and Fittings for Water-Based Ground-Source
(Geothermal) Heat Pump Systems
Piping, Fittings
UL 723-2018 Test for Surface Burning Characteristics of Building Materials
Miscellaneous
UL 778-2016 Motor-Operated Water Pumps (with revisions through January 17, 2019)
Pumps
UL 834-2004 Heating, Water Supply, and Power Boilers – Electric (with revisions through July 17, 2019)
Appliances
UL 1279-2010 Outline of Investigation for Solar Collectors Electrical UL 1699B-2018 Photovoltaic (PV) DC Arc-Fault Circuit Protection Electrical UL 1703-2002 Flat-Plate Photovoltaic Modules and Panels (with revisions through November 25, 2019)
Electrical
UL 1741-2010 Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy
Resources (with revisions through February 15, 2018)
Electrical
UL 1995-2015 Heating and Cooling Equipment (with revisions through August 17, 2018)
Heat Pumps
UL 2523-2009 Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, and Boilers (with revisions through March 16,
2018)
Fuel Gas, Appliances
UL 2703-2015 Mounting Systems, Mounting Devices,
Clamping/Retention Devices, and Ground Lugs for Use
with Flat-Plate Photovoltaic Modules and Panels (with
revisions through December 16, 2019)
Electrical
UL 2989-2016 Outline of Investigation for Tracer Wire Tracer Wire UL 3703-2015 Solar Trackers Electrical
UL 4703-2014 Photovoltaic Wire Electrical
UL 6703-2014 Connectors for Use in Photovoltaic Systems (with revisions through December 22, 2017)
Electrical
UL 8703-2011 Outline of Investigation for Concentrator Photovoltaic Mod- ules and Assemblies
Electrical
UL 60335-2-40-2017 Household And Similar Electrical Appliances-SafetyPart 2- 40: Particular Requirements for Electrical Heat Pumps, Air- Conditioners and Dehumidifiers
Heat Pumps
UL 61730-1-2017 Photovoltaic (PV) Module Safety Qualification - Part 1:

Requirements for Construction
Electrical
UL 61730-2-2017 Photovoltaic (PV) Module Safety Qualification - Part 2:

Requirements for Testing
Electrical
UL 62109-1-2014 Safety of Power Converters for Use in Photovoltaic Power Systems - Part 1: General Requirements (with
revisions through April 30, 2019)
Electrical
Enclosure C 300
HOA.105559019.8 80
ASHRAE 95-1981
(RA1987)
Methods of Testing to Determine the Thermal
Performance of Solar Domestic Water Heating Systems
Testing
ASHRAE 96-1980
(RA1989)
Thermal Performance of Unglazed Flat-Plate LiquidType Solar Collectors Testing, Collector ASME A13.1-2015 Scheme for the Identification of Piping Systems Piping ASME B16.21-2016 Nonmetallic Flat Gaskets for Pipe Flanges Joints ASME B16.34-2017 Valves - Flanged, Threaded, and Welding End Valves ASME B16.47-2017 Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch
Fittings
ASME BPVC Section IV2017 Rules for Construction of Heating Boilers Miscellaneous ASME BPVC Section IX2017 Welding, Brazing, and Fusing Qualifications Certification ASSE 1010-2004 Water Hammer Arresters Water Supply
Component
ASTM A377-2018 Ductile Iron Pressure Pipe Piping, Ferrous ASTM A733-2016 Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples
Piping, Ferrous
ASTM D56-2016a Flash Point by Tag Closed Cup Tester Testing ASTM D93-2019 Flash Point by Pensky-Martens Closed Cup Tester Testing ASTM D635-2018 Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
Testing
ASTM D2235-2004
(R2016)
Solvent Cement for Acrylonitrile-Butadiene-Styrene
(ABS) Plastic Pipe and Fittings
Joints
ASTM D2672-2014 Joints for IPS PVC Pipe Using Solvent Cement Joints ASTM D2855-2015 Two-Step (Primer and Solvent Cement) Method of Joining Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Pipe and Piping Components
with Tapered Sockets
Joints
ASTM D3278-1996
(R2011)
Flash Point of Liquids by Small Scale Closed-Cup
Apparatus
Testing
ASTM E136-2019a Assessing Combustibility of Materials Using a Vertical Tube Furnace at 750°C
Furnace
ASTM F480-2014 Thermoplastic Well Casing Pipe and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and
SCH 80
Piping, Plastic
ASTM F891-2016 Coextruded Poly(Vinyl Chloride) (PVC) Plastic Pipe with a Cellular Core
Piping, Plastic
AWS B2.2/B2.2M-2016 Brazing Procedure and Performance Qualification Certification AWWA C507-2018 Ball Valves, 6 In. through 60 In. (150 mm Through 1,500 mm)
Valves
BS EN 12975-1-2006
(R2010)
Thermal Solar Systems and Components – Solar
Collectors – Part 1: General Requirements
Collector
ASHRAE 90.1-2019 Energy Standard for Buildings Except Low-Rise Residential Buildings
Energy
ASHRAE 93-2010 (RA2014) Methods of Testing to Determine the Thermal Performance of Solar Collectors
Testing
Enclosure C 301
HOA.105559019.8 81
BS EN 12976-1-2017 Thermal Solar Systems and Components – Factory Made Systems – Part 1: General Requirements
Solar Thermal Systems
BS EN 12976-2-2017 Thermal Solar Systems and Components – Factory Made Systems – Part 2: Test Methods
Solar Thermal Systems
BS EN ISO 9806-2017 Solar Energy – Solar Thermal Collectors – Test Methods
Collector
BS EN ISO 9488-2000 Solar Energy – Vocabulary Miscellaneous CSA Z21.22-2015 Relief Valves for Hot Water Supply Systems (same as CSA 4.4)
Valves
TABLE U 18.1

REFERENCED STANDARDS

STANDARD NUMBER STANDARD TITLE APPLICATION
AHRI
AHRI 210/240-2020 Performance Rating of Unitary Airconditioning & Air- source Heat Pump Equipment
Air-Source Heat Pumps
AHRI 870-2016 Performance Rating of Direct
Geoexchange Heat Pumps
Equipment
AHRI/ASHRAE/ISO 13256-1-
1998 (R2012)
Water-Source Heat Pumps – Testing and
Rating for Performance – Part 1: Waterto-Air and Brine-to-Air Heat Pumps Water-Source Heat Pumps
AHRI/ASHRAE/ISO 13256-2-
1998 (R2012)
Water-Source Heat Pumps – Testing and
Rating for Performance – Part 2: Waterto-Water and Brine-to-Water Heat Pumps Water-Source Heat Pumps
ASHRAE
AHRI/ASHRAE/ISO 13256-1-
1998 (R2012)
Water-Source Heat Pumps – Testing and
Rating for Performance – Part 1: Water-toAir and Brine-to-Air Heat Pumps Water-Source Heat Pumps
AHRI/ASHRAE/ISO 13256-2-
1998 (R2012)
Water-Source Heat Pumps – Testing and
Rating for Performance – Part 2: Water-toWater and Brine-to-Water Heat Pumps Water-Source Heat Pumps
ASHRAE 34-2022 Designation and Safety Classification of Refrigerants
Refrigerant Classifications
ASHRAE 194-2017 Method of Test for Direct-Expansion
Ground-Source Heat Pumps
Ground-Source Heat Pumps
ASME
ASME A112.1.2-2012
(R2022)
Air Gaps in Plumbing Systems (for
Plumbing Fixtures and Water-Connected
Receptors)
Backflow Protection
ASME A112.1.3-2000
(R2019)
Air Gap Fittings for Use with
Plumbing Fixtures, Appliances, and
Appurtenances
Backflow Protection
ASME A112.4.1-2009
(R2019)
Water Heater Relief Valve Drain
Tubes
Discharge Piping
ASSE 1070/ASME
A112.1070/CSA B125.70- 2020
Water Temperature Limiting
Devices
Valves
ASME B1.20.1-2013
(R2018)
Pipe Threads, General Purpose
(Inch)
Joints
ASME B16.3-2021 Malleable Iron Threaded Fittings:

Classes 150 and 300
Fittings
Enclosure C 302
HOA.105559019.8 82
ASME B16.5-2020 Pipe Flanges and Flanged Fittings:
136»7KURXJK1360HWULF,QFK
Fittings
ASME B16.9-2018 Factory-Made Wrought
Buttwelding Fittings
Fittings
ASME B16.11-2021 Forged Fittings, Socket-Welding
and Threaded
Fittings
ASME B16.15-2018 Cast Copper Alloy Threaded
Fittings: Classes 125 and 250
Fittings
ASME B16.18-2021 Cast Copper Alloy Solder Joint
Pressure Fittings
Fittings
ASME B16.22-2021 Wrought Copper and Copper Alloy
Solder-Joint Pressure Fit- tings
Fittings
ASME B16.23-2021 Cast Copper Alloy Solder Joint
Drainage Fittings: DWV
Fittings
ASME B16.24-2021 Cast Copper Alloy Pipe Flanges,
Flanged Fittings, and Valves: Classes
150, 300, 600, 900, 1500, and 2500
Fittings
ASME B16.26-2018 Cast Copper Alloy Fittings for
Flared Copper Tubes
Fittings
ASME B16.29-2017 Wrought Copper and Wrought
Copper Alloy Solder-Joint Drainage
Fittings – DWV
Fittings
ASME B16.51-2021 Copper and Copper Alloy PressConnect Pressure Fittings Fittings ASME BPVC Section
VIII.1-2021
Rules for Construction of Pressure
Vessels Division 1
Miscellaneous
ASME BPVC Section X2021 Fiber-Reinforced Plastic Pressure Vessels
Pressure Vessel Construction,
Pressure Vessels
ASME SA194-2021 Carbon and Alloy Steel Nuts for
Bolts for High Pressure or High
Temperature Service, or Both
Mounting
ASSE
ASSE 1013-2021 Performance Requirements for Reduced
Pressure Principle Backflow Prevention
Assemblies
Backflow Prevention
ASSE 1017-2009 Performance Requirements for
Temperature Actuated Mix- ing Valves for
Hot Water Distribution Systems
Valves
ASSE 1061-2020 Performance Requirements for Push-Fit
Fittings
Fittings
ASSE 1070/ASME
A112.1070/CSA B125.70- 2020
Water Temperature Limiting Devices Valves
ASSE 1079-2012 (R2021) Performance Requirements for Dielectric Pipe Unions
Fittings
ASTM
ASTM A53/A53M-2022 Standard Specification for Pipe, Steel, Black and Hot- Dipped, Zinc-Coated,
Welded and Seamless
Piping
ASTM A106/A106M2019a Standard Specification for Seamless Carbon Steel Pipe for HighTemperature Service
Piping
ASTM A126-2004
(R2019)
Standard Specification for Gray Iron
Castings for Valves, Flanges, and Pipe
Fittings
Piping
ASTM A254/A254M-2012
(R2019)
Standard Specification for Copper-Brazed
Steel Tubing
Piping
Enclosure C 303
HOA.105559019.8 83
ASTM A269/A269M-2022 Standard Specification for Seamless and Welded Austenitic Stainless Steel
Tubing for General Service
Piping
ASTM A312/A312M2022a Standard Specification for Seamless, Welded, and Heavily Cold Worked
Austenitic Stainless Steel Pipes
Piping
ASTM A420/A420M-2022 Standard Specification for Piping
Fittings of Wrought Car- bon Steel and
Alloy Steel for Low-Temperature
Service
Fittings
ASTM A554-2021 Standard Specification for Welded
Stainless Steel Mechanical Tubing
Piping
ASTM A778/A778M-2022 Standard Specification for Welded, Unannealed Austenitic Stainless Steel
Tubular Products
Piping
ASTM B32-2020 Standard Specification for Solder Metal Joints ASTM B42-2020 Standard Specification for Seamless
Copper Pipe, Standard Sizes
Piping
ASTM B43-2020 Standard Specification for Seamless
Red Brass Pipe, Standard Sizes
Piping
ASTM B75/B75M-2020 Standard Specification for Seamless
Copper Tube
Piping
ASTM B88-2022 Standard Specification for Seamless
Copper Water Tube
Piping
ASTM B135/B135M-2017 Standard Specification for Seamless Brass Tube
Piping
ASTM B251/B251M-2017 Standard Specification for General Requirements for Wrought Seamless
Copper and Copper-Alloy Tube
Piping
ASTM B280-2020 Standard Specification for Seamless
Copper Tube for Air Conditioning and
Refrigeration Field Service
Piping
ASTM B302-2017 Standard Specification for Threadless
Copper Pipe, Standard Sizes
Piping
ASTM B447-2012a (R2021) Standard Specification for Welded Copper Tube
Piping
ASTM B813-2016 Standard Specification for Liquid and
Paste Fluxes for Soldering of Copper
and Copper Alloy Tube
Joints
ASTM B828-2016 Standard Practice for Making Capillary
Joints by Soldering of Copper and
Copper Alloy Tube and Fittings
Joints
ASTM C411-2019 Standard Test Method for Hot-Surface
Performance of High- Temperature
Thermal Insulation
Duct Coverings and Linings
ASTM D1693-2021 Standard Test Method for
Environmental Stress-Cracking of
Ethylene Plastics
Piping
ASTM D1785-2021a Standard Specification for Poly(Vinyl
Chloride) (PVC) Plas- tic Pipe,
Schedules 40, 80, and 120
Piping
ASTM D2241-2020 Standard Specification for Poly(Vinyl
Chloride) (PVC) Pres- sure-Rated Pipe
(SDR Series)
Piping
ASTM D2464-2015 Standard Specification for Threaded
Poly(Vinyl Chloride) (PVC) Plastic Pipe
Fittings, Schedule 80
Fittings
Enclosure C 304
HOA.105559019.8 84
ASTM D2466-2021 Standard Specification for Poly(Vinyl
Chloride) (PVC) Plas- tic Pipe Fittings,
Schedule 40
Fittings
ASTM D2467-2020 Standard Specification for Poly(Vinyl
Chloride) (PVC) Plas- tic Pipe Fittings,
Schedule 80
Fittings
ASTM D2564-2020 Standard Specification for Solvent
Cements for Poly(Vinyl Chloride) (PVC)
Plastic Piping Systems
Joints
ASTM D2609-2021 Standard Specification for Plastic Insert Fittings for Polyethylene (PE) Plastic
Pipe
Fittings
ASTM D2683-2020 Standard Specification for Socket-Type
Polyethylene Fittings for Outside
Diameter-Controlled Polyethylene Pipe
and Tubing
Fittings
ASTM D2737-2022 Standard Specification for Polyethylene (PE) Plastic Tubing
Piping
ASTM D2846/D2846M- 2019a Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hotand Cold-Water Distribution Systems Piping
ASTM D3035-2022 Standard Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on
Controlled Outside Diameter
Piping
ASTM D3138-2021 Standard Specification for Solvent
Cements for Transition Joints Between
Acrylonitrile-Butadiene-Styrene (ABS)
and Poly(Vinyl Chloride) (PVC) NonPressure Piping Components Joints
ASTM D3139-2019 Standard Specification for Joints for
Plastic Pressure Pipes Using Flexible
Elastomeric Seals
Joints
ASTM D3261-2016 Standard Specification for Butt Heat
Fusion Polyethylene (PE) Plastic
Fittings for Polyethylene (PE) Plastic
Pipe and Tubing
Fittings
ASTM D3350-2021 Standard Specification for Polyethylene Plastics Pipe and Fittings Materials
Piping
ASTM E84-2023 Standard Test Method for Surface
Burning Characteristics of Building
Materials
Miscellaneous
ASTM F437-2021 Standard Specification for Threaded
Chlorinated Poly (Vinyl Chloride)
(CPVC) Plastic Pipe Fittings, Schedule
80 Fittings
ASTM F438-2017 Standard Specification for Socket-Type
Chlorinated Poly (Vinyl Chloride)
(CPVC) Plastic Pipe Fittings, Schedule
40 Fittings
ASTM F439-2019 Standard Specification for Chlorinated
Poly (Vinyl Chloride) (CPVC) Plastic
Pipe Fittings, Schedule 80
Fittings
ASTM F441/F441M-2020 Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic
Pipe, Schedules 40 and 80
Piping
Enclosure C 305
HOA.105559019.8 85
ASTM F442/F442M-2020 Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic
Pipe (SDR-PR)
Piping, Plastic
ASTM F493-2022 Standard Specification for Solvent
Cements for Chlorinated Poly (Vinyl
Chloride) (CPVC) Plastic Pipe and
Fittings
Joints
ASTM F656-2021 Standard Specification for Primers for
Use in Solvent Cement Joints of Poly
(Vinyl Chloride) (PVC) Plastic Pipe and
Fittings
Joints
ASTM F714-2022 Standard Specification for Polyethylene
(PE) Plastic Pipe (DR-PR) Based on
Outside Diameter
Piping
ASTM F876-2023 Standard Specification for Crosslinked
Polyethylene (PEX) Tubing
Piping
ASTM F877-2023 Standard Specification for Crosslinked
Polyethylene (PEX) Hot- and ColdWater Distribution Systems Piping
ASTM F1055-2016a (R2022) Standard Specification for Electrofusion Type Polyethylene Fittings for Outside
Diameter Controlled Polyethylene and
Crosslinked Polyethylene (PEX) Pipe
and Tubing
Fittings
ASTM F1281-2023 Standard Specification for Crosslinked
Polyethylene/ Aluminum/Crosslinked
Polyethylene (PEX-AL-PEX) Pressure
Pipe
Piping
ASTM F1282-2017 Standard Specification for
Polyethylene/Aluminum/Poly- ethylene
(PE-AL-PE) Composite Pressure Pipe
Piping
ASTM F1476-2007 (R2019) Standard Specification for Performance of Gasketed Mechanical Couplings for
Use in Piping Applications
Fittings
ASTM F1548-2001 (R2018) Standard Specification for Performance of Fittings for Use with Gasketed
Mechanical Couplings Used in Piping
Applications
Fittings
ASTM F1807-2023 Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring,
or Alternate Stainless Steel Clamps, for
SDR9 Cross-linked Polyethylene (PEX)
Tubing and SDR9 Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F1960-2023 Standard Specification for Cold
Expansion Fittings with PEX Reinforcing
Rings for Use with Cross-linked
Polyethylene (PEX) and Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F1970-2023 Standard Specification for Special
Engineered Fittings, Appurtenances or
Valves for Use in Poly (Vinyl Chloride)
(PVC) or Chlorinated Poly (Vinyl
Chloride) (CPVC) Systems
Piping
ASTM F1974-2009 (R2020) Standard Specification for Metal Insert Fittings for
Polyethylene/Aluminum/Polyethylene
Fittings
Enclosure C 306
HOA.105559019.8 86
and Crosslinked
Polyethylene/Aluminum/Crosslinked
Polyethylene Composite Pressure Pipe
ASTM F2080-2023 Standard Specification for ColdExpansion Fittings with Metal Compression-Sleeves for Crosslinked
Polyethylene (PEX) Pipe and SDR9
Polyethylene of Raised Temperature
(PE-RT) Pipe
Fittings
ASTM F2098-2018 Standard Specification for Stainless
Steel Clamps for Securing SDR9 Crosslinked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised
Temperature (PE-RT) to Metal Insert
and Plastic Insert Fittings
Fittings
ASTM F2159-2023a Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring,
or Alternate Stainless Steel Clamps for
SDR9 Cross-linked Polyethylene (PEX)
Tubing and SDR9 Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F2165-2019 Standard Specification for Flexible PreInsulated Plastic Piping Fittings, Piping and Tubing ASTM F2389-2023 Standard Specification for PressureRated Polypropylene (PP) Piping Systems
Pipings
ASTM F2434-2019 Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring
for SDR9 Cross-linked Polyethylene
(PEX) Tubing and SDR9 Cross-linked
Polyethylene/Aluminum/Cross-linked
Polyethylene (PEX-AL-PEX) Tubing
Fittings
ASTM F2620-2020ae2 Standard Practice for Heat Fusion
Joining of Polyethylene Pipe and
Fittings
Joints
ASTM F2623-2022 Standard Specification for Polyethylene of Raised Temperature (PE-RT)
Systems for Non-Potable Water
Applications
Piping
ASTM F2735-2021 Standard Specification for Plastic Insert Fittings for SDR9 Cross-linked
Polyethylene (PEX) and Polyethylene of
Raised Temperature (PE-RT) Tubing
Fittings
ASTM F2769-2023 Standard Specification for Polyethylene of Raised Temperature (PE-RT) Plastic
Hot and Cold-Water Tubing and
Distribution Systems
Piping, Fitting
ASTM F2855-2019 Standard Specification for Chlorinated
Poly (Vinyl Chloride)/Aluminum/Chlorinated Poly (Vinyl Chloride) (CPVC- AL-CPVC) Composite
Pressure Tubing
Piping, Plastic
ASTM F3226/F3226M2019 Standard Specification for Metallic Press-Connect Fittings for Piping and
Tubing Systems
Fittings
ASTM F3253-2019 Standard Specification for Crosslinked
Polyethylene (PEX) Tubing with Oxygen
Piping, Fittings
Enclosure C 307
HOA.105559019.8 87
Barrier for Hot- and Cold-Water
Hydronic Distribution Systems
ASTM F3347-2023 Standard Specification for Metal Press
Insert Fittings with Factory Assembled
Stainless Steel Press Sleeve for SDR9
Cross-linked Polyethylene (PEX) Tubing
and SDR9 Polyethylene of Raised
Temperature (PE-RT) Tubing
Fittings
ASTM F3348-2023 Standard Specification for Plastic Press Insert Fittings with Factory Assembled
Stainless Steel Press Sleeve for SDR9
Cross-linked Polyethylene (PEX) Tubing
and SDR9 Polyethylene of Raised
Temperature (PE-RT) Tubing
Fittings
AWS
AWS A5.8M/A5.8-2019 Filler Metals for Brazing and Braze Welding
Joints
AWS A5.9/A5.9M-2022 (ISO
14343-2017 MOD)
Specification for Bare Stainless Steel
Welding Electrodes and Rods
Joints
AWWA
AWWA C110/A21.10- 2021 Ductile-Iron and Gray-Iron Fittings Fittings AWWA C111/A21.11- 2017 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings
Joints
AWWA C115/A21.15- 2020 Flanged Ductile-Iron Pipe with DuctileIron or Gray-Iron Threaded Flanges Piping AWWA C151/A21.51- 2017 Ductile-Iron Pipe, Centrifugally Cast Piping AWWA C153/A21.53-2019 Ductile-Iron Compact Fittings Fittings AWWA C901-2020 Polyethylene (PE) Pressure Pipe and
7XELQJ»,Q

PP
7KURXJK,Q
(76 mm), for Water Service
Piping
CSA
ASSE 1070/ASME
A112.1070/CSA B125.70- 2020
Water Temperature Limiting Devices Valves
CSA B137.1-2020 Polyethylene (PE) Pipe, Tubing, and
Fittings for Cold-Water Pressure
Services
Piping
CSA B137.2-2020 Polyvinylchloride (PVC) InjectionMoulded Gasketed Fittings for Pressure Applications
Fittings
CSA B137.3-2020 Rigid Polyvinylchloride (PVC) Pipe and
Fittings for Pressure Applications
Piping, Fittings
CSA B137.5-2020 Crosslinked Polyethylene (PEX) Tubing
Systems for Pres- sure Applications
Piping
CSA B137.6-2020 Chlorinated Polyvinylchloride (CPVC)
Pipe, Tubing, and Fittings for Hot- and
Cold-Water Distribution Systems
Piping, Fittings
CSA B137.9-2020 Polyethylene/Aluminum/Polyethylene
(PE-AL-PE) Composite Pressure-Pipe
Systems
Piping
CSA B137.10-2020 Crosslinked
Polyethylene/Aluminum/Crosslinked
Polyethylene (PEX-AL-PEX) Composite
Pressure-Pipe Systems
Piping
Enclosure C 308
HOA.105559019.8 88
CSA B137.11-2020 Polypropylene (PP-R & PP-RCT) Pipe
and Fittings for Pressure Applications
Piping
CSA B137.18-2020 Polyethylene of Raised Temperature
Resistance (PE-RT) Tubing Systems for
Pressure Applications
Piping, Fittings
CSA C22.2 No. 108-2014
(R2019)
Liquid Pumps Pumps
ANSI/CSA/IGSHPA C448
Series-2016 (R2021)
Design and Installation of Ground
Source Heat Pump Systems for
Commercial and Residential Buildings
Ground-Source Heat Pumps
CSA/ANSI Z21.10.1-
2019/CSA 4.1-2019
Gas Water Heaters, Volume I, Storage
Water Heaters with Input Ratings of
75,000 Btu Per Hour or Less
Fuel Gas, Appliances
CSA/ANSI Z21.10.3-
2019/CSA 4.3-2019
Gas-Fired Water Heaters, Volume III,
Storage Water Heaters with Input
Ratings Above 75,000 Btu Per Hour,
Circulating and Instantaneous
Fuel Gas, Appliances
IAPMO
IAPMO/ANSI H1001.1- 2021 Standard for Quality of Heat Transfer Fluids Used in Hydronics Systems
Heat Transfer Fluid
IAPMO/ANSI/CAN Z1117-
2022
Standard for Press Connections Fittings
IAPMO IGC 353-2019e1 Branch Connectors Fittings
IAPMO S1001.1-2013
(R2019)
Design and Installation of Solar Water
Heating Systems
Solar Thermal Systems
ICC
ICC 900/SRCC 300-2020 Solar Thermal System Standard Solar Thermal Systems ICC 901/SRCC 100-2020 Solar Thermal Collector Standard Collectors IGSHPA
ANSI/CSA/IGSHPA C448
Series-2016 (R2021)
Design and Installation of Ground
Source Heat Pump Systems for
Commercial and Residential Buildings
Ground-Source Heat Pumps
ISO
AHRI/ASHRAE/ISO 13256-
1-1998 (R2012)
Water-Source Heat Pumps – Testing
and Rating for Performance – Part 1:

Water-to-Air and Brine-to-Air Heat
Pumps
Water-Source Heat Pumps
AHRI/ASHRAE/ISO 13256-
2-1998 (R2012)
Water-Source Heat Pumps – Testing
and Rating for Performance – Part 2:

Water-to-Water and Brine-to-Water Heat
Pumps
Water-Source Heat Pumps
NFPA
NFPA 70-2023 National Electrical Code Miscellaneous
NGWA
NGWA-01-2014 Water Well Construction Standard Geothermal NSF
NSF/ANSI/CAN 60-2021 Drinking Water Treatment ChemicalsHealth Effects Backfill NSF/ANSI/CAN 61-2022 Drinking Water System Components - Health Effects
Miscellaneous
Enclosure C 309
HOA.105559019.8 89
NSF/ANSI 358-1-2021 Polyethylene Pipe and Fittings for
Water-Based Ground- Source
“Geothermal” Heat Pump Systems
Piping, Fittings
NSF/ANSI 358-2-2017 Polypropylene Pipe and Fittings for Water-Based Ground- Source
“Geothermal” Heat Pump Systems
Piping, Fittings
NSF/ANSI 358-3-2021 Cross-Linked Polyethylene (PEX) Pipe and Fittings for Water- Based GroundSource (Geothermal) Heat Pump Systems
Piping, Fittings
NSF/ANSI 358-4-2022 Polyethylene of Raised Temperature
(PE-RT) Tubing and Fittings for WaterBased Ground-Source (Geothermal) Heat Pump Systems
Piping, Fittings
NSF/ANSI/CAN 372-2022 Drinking Water System Components - Lead Content
Miscellaneous
SRCC
ICC 900/SRCC 300-2020 Solar Thermal System Standard Solar Thermal Systems ICC 901/SRCC 100-2020 Solar Thermal Collector Standard Collectors UL
UL 98B-2015 Outline of Investigation for Enclosed
and Dead-front Switches for use in
Photovoltaic Systems
Electrical
UL 248-2019 Low-Voltage Fuses – Part 19:

Photovoltaic Fuses (with revisions
through February 28, 2020)
Electrical
UL 489B-2016 Molded-Case Circuit Breakers,
Molded-Case Switches, and CircuitBreaker Enclosures for Use with Photovoltaic (PV) Systems (with
revisions through May 19, 2021)
Electrical
UL 508I-2015 Outline of Investigation for Disconnect
Switches Intended for Use in
Photovoltaic Systems
Electrical
UL 723-2018 Test for Surface Burning Characteristics
of Building Materials
Miscellaneous
UL 778-2016 Motor-Operated Water Pumps (with
revisions through June 29, 2021)
Pumps
UL 834-2004 Heating, Water Supply, and Power
Boilers – Electric (with revisions through
July 17, 2019)
Appliances
UL 1279-2010 Outline of Investigation for Solar
Collectors
Electrical
UL 1699B-2018 Photovoltaic (PV) DC Arc-Fault Circuit
Protection (with revisions through May
18, 2021)
Electrical
UL 1703-2002 Flat-Plate Photovoltaic Modules and
Panels (with revisions through
November 25, 2019)
Electrical
UL 1741-2021 Inverters, Converters, Controllers and
Interconnection System Equipment for
Use With Distributed Energy
Resources (with revisions through
October 18, 2022)
Electrical
UL 1995-2022 Heating and Cooling Equipment Heat Pumps
Enclosure C 310
HOA.105559019.8 90
UL 2523-2009 Solid Fuel-Fired Hydronic Heating
Appliances, Water Heaters, and Boilers
(with revisions through October 20,
2022)
Fuel Gas, Appliances
UL 2703-2015 Mounting Systems, Mounting Devices,
Clamping/Retention Devices, and
Ground Lugs for Use with Flat-Plate
Photovoltaic Modules and Panels (with
revisions through March 24, 2021)
Electrical
UL 2846-2014 Fire Test of Plastic Water
Distribution Plumbing Pipe for Visible
Flame and Smoke Characteristics
(with revisions through January 14,
2021)
Piping
UL 2989-2022 Outline of Investigation for Tracer Wire Tracer Wire UL 3703-2015 Solar Trackers (with revisions through
April 7, 2020)
Electrical
UL 3730-2014 Photovoltaic Junction Boxes (with
revisions through June 11, 2021)
Electrical
UL 3741-2020 Photovoltaic Hazard Control Electrical
UL 4703-2014 Photovoltaic Wire (with revisions through
August 11, 2020)
Electrical
UL 6703-2014 Connectors for Use in Photovoltaic
Systems (with revisions through June 10,
2021)
Electrical
UL 7103-2019 Outline of Investigation for BuildingIntegrated Photovoltaic Roof Coverings Electrical UL 8703-2011 Outline of Investigation for Concentrator
Photovoltaic Mod- ules and Assemblies
Electrical
UL 60335-2-40-2022 Household and Similar Electrical
Appliances-Safety-Part 2- 40: Particular
Requirements for Electrical Heat Pumps,
Air- Conditioners and Dehumidifiers
Heat Pumps
UL 61730-1-2022 Photovoltaic (PV) Module Safety
Qualification - Part 1: Requirements for
Construction
Electrical
UL 61730-2-2022 Photovoltaic (PV) Module Safety
Qualification - Part 2: Requirements for
Testing
Electrical
UL 62109-1-2014 Safety of Power Converters for Use in
Photovoltaic Power Systems - Part 1:

General Requirements (with revisions
through April 30, 2019)
Electrical
SECTION 30. Table S 18.2 is hereby deleted and replaced by Table U 18.2 to read as follows:

Enclosure C 311
HOA.105559019.8 91
TABLE S 18.2

STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES
TABLE U 18.2

STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES

DOCUMENT NUMBER DOCUMENT TITLE APPLICATION
ASHRAE
ASHRAE 90.1-2019 Energy Standard for Buildings Except Low-Rise Residential Buildings
Energy
ASHRAE 93-2010
(RA2014)
Methods of Testing to Determine the Thermal Performance of Solar Collectors
Testing

DOCUMENT NUMBER DOCUMENT TITLE APPLICATION
CSA Z21.24-2015 Connectors for Gas Appliances (same as CSA 6.10) Fuel Gas IAPMO IGC 332-2017a Hydronic Radiators Hydronic Systems IEEE 937-2007 Installation and Maintenance of Lead-Acid Batteries for Photovoltaic (PV) Systems
Installation and
Maintenance,
Photovoltaic
IEEE 1013-2019 Sizing Lead-Acid Batteries for Stand-Alone Photovoltaic (PV) Systems
Photovoltaic, Sizing
IEEE 1361-2014 Selecting, Charging, Testing, and Evaluating LeadAcid Batteries Used in Stand-Alone Photovoltaic (PV) Systems
Testing, Evaluation
IEEE 1526-2003 Testing the Performance of Stand-Alone Photovoltaic Systems
Testing, Photovoltaic
IEEE 1547-2018 Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power
Systems Interfaces
Connections,
Photovoltaic
IEEE 1562-2007 Array and Battery Sizing in Stand-Alone Photovoltaic (PV) Systems
Array, Battery,
Photo- voltaic
IEEE 1661-2019 Test and Evaluation of Lead-Acid Batteries Used in Photovoltaic (PV) Hybrid Power Systems
Testing and
Evaluation,
Photovoltaic
MSS SP-58-2018 Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation
(including Amendment 1, dated October 17, 2019)
Fuel Gas
MSS SP-80-2019 Bronze Gate, Globe, Angle, and Check Valves Valves NFPA 54/Z223.1-2018 National Fuel Gas Code Fuel Gas
NFPA 274-2018 Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation
Pipe Insulation
NSF 14-2018 Plastic Piping System Components and Related Materials Piping, Plastic UL 174-2004 Household Electric Storage Tank Water Heaters (with revisions through December 3, 2019)
Appliances
UL 873-2007 Temperature-Indicating and -Regulating Equipment (with revisions through February 6, 2015)
Electrical
UL 916-2015 Energy Management Equipment Electrical
UL 1453-2016 Electric Booster and Commercial Storage Tank Water Heaters (with revisions through May 18, 2018)
Appliances
UL 60730-1 2016 Automatic Electrical Controls – Part 1: General Requirements
Electrical
Enclosure C 312
HOA.105559019.8 92
ASHRAE 95-1981
(RA1987)
Methods of Testing to Determine the Thermal Performance of Solar Domestic Water Heating Systems
Testing
ASHRAE Handbook2021 Fundamentals Electrical
ASHRAE 96-1980
(RA1989)
Thermal Performance of Unglazed Flat-Plate Liquid-Type Solar Collectors
Testing, Collector
ASME
ASME A13.1-2020 Scheme for the Identification of Piping Systems Piping ASME B16.21-2021 Nonmetallic Flat Gaskets for Pipe Flanges Joints ASME B16.34-2020 Valves - Flanged, Threaded, and Welding End Valves ASME B16.47-2020 Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch
Fittings
ASME BPVC Section IV2021 Rules for Construction of Heating Boilers Miscellaneous ASME BPVC Section IX2021 Welding, Brazing, and Fusing Qualifications Certification ASSE
ASSE 1010-2021 Performance Requirements for Water Hammer Arresters Water Supply Component
ASTM
ASTM A377-2018
(R2022)e1
Standard Index of Specifications for Ductile Iron Pressure Pipe Piping, Ferrous ASTM A733-2016
(R2022)
Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples
Piping, Ferrous
ASTM D56-2022 Standard Test Method for Flash Point by Tag Closed Cup Tester Testing ASTM D93-2020 Standard Test Method for Flash Point by Pensky-Martens Closed Cup Tester
Testing
ASTM D635-2022 Standard Test Methods for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
Testing
ASTM D2235-2022 Standard Specification for Solvent Cement for AcrylonitrileButadiene-Styrene (ABS) Plastic Pipe and Fittings Joints ASTM D2672-2020e1 Standard Specification for Joints for IPS PVC Pipe Using Solvent Cement
Joints
ASTM D2855-2020 Standard Practice for the Two-Step (Primer and Solvent Cement) Method of Joining Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Pipe and Piping Components with Tapered Sockets
Joints
ASTM D3278-2021 Standard Test Method for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
Testing
ASTM E136-2022 Standard Test Method for Assessing Combustibility of Materials Using a Ver- tical Tube Furnace at 750°C
Furnace
ASTM F480-2014
(R2022)
Standard Specification for Thermoplastic Well Casing Pipe and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80
Piping, Plastic
ASTM F891-2016 Standard Specification for Coextruded Poly(Vinyl Chloride) (PVC) Plastic Pipe with a Cellular Core
Piping, Plastic
AWS
AWS B2.2/B2.2M-2016 Brazing Procedure and Performance Qualification Certification AWWA
AWWA C507-2018 Ball Valves, 6 In. through 60 In. (150 mm Through 1,500 mm) Valves BS
Enclosure C 313
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BS EN 12975-1-
2006 (R2010)
Thermal Solar Systems and Components – Solar Collectors – Part 1: General Requirements
Collector
BS EN 12976-1-2021 Thermal Solar Systems and Components – Factory Made Systems – Part 1: General Requirements
Solar Thermal Systems
BS EN 12976-2-2019 Thermal Solar Systems and Components – Factory Made Systems – Part 2: Test Methods
Solar Thermal Systems
BS EN ISO 9806-2017 Solar Energy – Solar Thermal Collectors – Test Methods Collector BS EN ISO 9488-2022 Solar Energy – Vocabulary Miscellaneous CSA
ANSI Z21.22-2015
(R2020)/CSA 4.4-
2015 (R2020)
Relief Valves for Hot Water Supply Systems Valves
CSA/ANSI Z21.24-
2022/CSA 6.10-
2022
Connectors for Gas Appliances Fuel Gas
IAPMO
IAPMO IGC 332-2017a Hydronic Radiators Hydronic Systems IAPMO IS 34-2020 Installation Standard for Residential Solar Photovoltaic and Energy Storage Systems
Solar PV Systems

IAPMO/ANSI
WE•Stand- 2020
Water Efficiency and Sanitation Standard for the Built
Environment
Water Conservation
IEEE
IEEE 937-2019 Installation and Maintenance of Lead-Acid Batteries for Photovoltaic (PV) Systems
Installation and
Maintenance,
Photovoltaic
IEEE 1013-2019 Sizing Lead-Acid Batteries for Stand-Alone Photovoltaic (PV) Systems
Photovoltaic, Sizing
IEEE 1361-2014 Selecting, Charging, Testing, and Evaluating Lead-Acid Batteries Used in Stand-Alone Photovoltaic (PV) Systems Testing, Evaluation
IEEE 1526-2020 IEEE Recommended Practice for Testing the Performance of Stand-Alone Photovoltaic Systems
Testing, Photovoltaic
IEEE 1547-2018 Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces Connections,
Photovoltaic
IEEE 1562-2021 Sizing of Stand-Alone Photovoltaic (PV) Systems Array, Battery, Photovoltaic
IEEE 1661-2019 Test and Evaluation of Lead-Acid Batteries Used in Photovoltaic (PV) Hybrid Power Systems
Testing and Evaluation,
Photovoltaic
MSS
MSS SP-58-2018 Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation (including Amendment 1, dated October 17, 2019)
Fuel Gas
MSS SP-80-2019 Bronze Gate, Globe, Angle, and Check Valves Valves NEMA
ANSI/NEMA 250-2020 Enclosures for Electrical Equipment (1000 Volts Maximum) Electrical NFPA
NFPA 13D-2022 Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes
Fire Safety
NFPA 54/Z223.1-2021 National Fuel Gas Code Fuel Gas
NFPA 70E-2021 Electrical Safety in the Workplace Electrical Safety NFPA 274-2018 Standard Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation
Pipe Insulation
Enclosure C 314
HOA.105559019.8 94
NSF
NSF/ANSI 14-2022 Plastics Piping System Components and Related Materials Piping, Plastic UL
UL 174-2004 Household Electric Storage Tank Water Heaters (with revisions through December 16, 2021)
Appliances
UL 916-2015 Energy Management Equipment (with revisions through October 21, 2021)
Electrical
UL 1453-2016 Electric Booster and Commercial Storage Tank Water Heaters (with revisions through May 18, 2018)
Appliances
UL 60730-1 2016 Automatic Electrical Controls – Part 1: General Requirements (with revisions through October 18, 2021)
Electrical
SECTION 31. Abbreviations in Table S 18.1 and Table S 18.2 are amended to read as follows:

ABBREVIATIONS IN TABLE SU 18.1 AND TABLE SU 18.2
AHRI
ANSI
ASHRAE
Air-Conditioning, Heating, and Refrigeration Institute, 2311 Wilson Boulevard, Suite 400, Arlington, VA22201. American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor, New York, NY 10036.

American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., 1791 Tullie Circle, NE,
Atlanta, GA 30329-2305.

ASME American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990.

ASSE American Society of Sanitary Engineering, 18927 Hickory Creek Drive, Suite 220, Mokena, IL 60448.

ASTM ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.

AWS American Welding Society, 8669 NW 36 Street, # 130, Miami, FL 33166- 6672.

AWWA American Water Works Association, 6666 W. Quincy Avenue, Denver, CO 80235.

BSI (BS EN) British Standard International, 389 Chiswick High Road, London, W4 4AL United Kingdom.

CSA Canadian Standards Association, 178 Rexdale Boulevard, Toronto, ON, Canada M9W 1R3.
e1 An editorial change since the last revision or reapproval.

IAPMO International Association of Plumbing and Mechanical Officials, 4755 E.

Philadelphia Street, Ontario, CA 91761.

ICC International Code Council, 500 New Jersey Avenue, NW, 6th Floor, Washington, DC 20001.

Enclosure C 315
HOA.105559019.8 95
IEEE The Institute of Electrical and Electronics Engineers, Inc., 3 Park Avenue, 17th Floor, New York, NY 10016-5997.

MSS Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street NE, Vienna, VA 22180.

NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NGWA National Ground Water Association, 601 Dempsey Road, Westerville, OH 43081.

NSF NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105.

SRCC Solar Rating and Certification Corporation, 3060 Saturn Street, Suite 100, Brea, CA 92821.

UL Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062.

AHRI Air-Conditioning, Heating, and Refrigeration Institute, 2311 Wilson Boulevard, Suite 400, Arlington, VA 22201.

ANSI American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor, New York, NY 10036.

ASHRAE American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., 1791 Tullie Circle, NE, Atlanta, GA 30329-2305.

ASME American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990.

ASSE American Society of Sanitary Engineering, 18927 Hickory Creek Drive, Suite 220, Mokena, IL 60448.

ASTM ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428- 2959.

AWS American Welding Society, 8669 NW 36 Street, # 130, Miami, FL 33166-6672.

AWWA American Water Works Association, 6666 W. Quincy Avenue, Denver, CO 80235.

BSI (BS EN) British Standard International, 12950 Worldgate Drive, Suite 800 Herndon, VA 20170.

CSA Canadian Standards Association, 178 Rexdale Boulevard, Toronto, ON, Canada M9W 1R3.

IAPMO International Association of Plumbing and Mechanical Officials, 4755 E.

Philadelphia Street, Ontario, CA 91761.

ICC International Code Council, 500 New Jersey Avenue, NW, 6th Floor, Washington, DC 20001.

IEEE The Institute of Electrical and Electronics Engineers, Inc., 445 and 501 Hoes Lane, Piscataway, NJ 08854.

IGSHPA International Ground Source Heat Pump Association, 312 S. 4th Street, Suite 100, Springfield, IL 62701.

ISO International Organization for Standardization, Chemin de Blandonnet 8, CP 401 - 1214 Vernier, Geneva, Switzerland.

Enclosure C 316
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MSS Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street NE, Vienna, VA 22180.

NEMA National Electrical Manufacturers Association, 1300 N. 17th Street, Suite 900, Rosslyn, VA 22209.

NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169- 7471.

NGWA National Ground Water Association, 601 Dempsey Road, Westerville, OH 43081.

NSF NSF International, 789 N. Dixboro Road, Ann Arbor, MI 48105.

SRCC Solar Rating and Certification Corporation, 3060 Saturn Street, Suite 100, Brea, CA 92821.

UL Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062.

SECTION 32. The provisions of this ordinance contain various changes, modifications, and additions to the 2025 California Plumbing Code. Some of those changes are administrative in nature in that they do not constitute changes or modifications to requirements contained in the building standards published in the California Building Standards Code.

Pursuant to California Health and Safety Code sections 17958.5, 17958.7, and 18941.5, the Board of Supervisors hereby expressly finds that all of the changes and modifications to requirements contained in the building standards published in the California Building Standards Code that are contained in this ordinance are reasonably necessary because of local climatic, geological, or topographical conditions in the County of Los Angeles due to the potential for seismic activity in the region, topographical conditions that contribute to the spread of wild fires, and climatic conditions that impact air quality, water conservation and increased wild fire risk. In addition, the Board of Supervisors expressly finds that the modifications herein are substantially equivalent to modifications that were previously filed by the County of Los Angeles and were in effect as of September 30, 2025. Without limiting the Enclosure C 317
HOA.105559019.8 97
foregoing, the County makes additional findings herein:

PLUMBING CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
Section 304.1 Geological
Topographical
Climatic
The County of Los Angeles is a densely
populated area with buildings constructed
within a region where water is scarce and
domestic water service is impacted by
immoderate and varying weather conditions,
including periods of extended drought. The
proposed measures will require buildings to
be more water efficient and allow greater
conservation of domestic water due to these
local conditions.

Sections 601.2.3 Geological
Topographical
Climatic
The County of Los Angeles is a densely
populated area with buildings constructed
within a region where water is scarce and
domestic water service is impacted by
immoderate and varying weather conditions,
including periods of extended drought. The
proposed measures will require buildings to
be more water efficient and allow greater
conservation of domestic water due to these
local conditions.

Section 721.3 Geological
Topographical
To allow for the proper operation of existing
Los Angeles County sewer infrastructure and
establish consistency with Title 20 – Utilities –
of the Los Angeles County Code, Division 2
(Sanitary Sewers and Industrial Waste) due
to local soil conditions and topography.

Sections 728.1 to
728.6
Geological
Topographical
To allow for the proper operation of existing
Los Angeles County sewer infrastructure and
establish consistency with Title 20 – Utilities –
of the Los Angeles County Code, Division 2
(Sanitary Sewers and Industrial Waste) due
to local soil conditions and topography.

Enclosure C 318
HOA.105559019.8 98
Table H 101.8 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions and to provide protections for
native, protected oak trees that are consistent
with Title 22 – Zoning and Planning – of the
Los Angeles County Code, Chapter 22.174
(Oak Tree Permits).

Table H 201.1(1) Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions, sewer capacity, and sewage
treatment.

Table H 201.1(2) Geological
Topographical
To establish consistency with requirements of
the County Health Department for sewer
capacity and sewage treatment due to local
soil conditions.

Table H 201.1(3) Geological
Topographical
To establish consistency with requirements of
the County Health Department for sewer
capacity and sewage treatment due to local
soil conditions.

Table H 201.1(4) Geological
Topographical
To establish consistency with requirements of
the County Health Department for sewer
capacity and sewage treatment due to local
soil conditions.

Section H 301.1 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions.

Section H 401.3 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions.

Section H 601.5 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions.

Section H 601.8 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions.

Section H 701.2 Geological
Topographical
To establish more restrictive requirements for
protection of local groundwater due to local
soil conditions.

Enclosure C 319
HOA.105559019.8 99
Section H 1001.1 Geological To establish more restrictive requirements to prevent earth movement based on local soil
and seismic conditions.

Section H 1101.6 Geological To establish more restrictive requirements to prevent earth movement based on local soil
and seismic conditions.

Appendix T Climatic and
Topographical
To establish requirements for conservation
and disposal of swimming pool water to
minimize evaporation and topographical
impacts.

Appendix U Climatic To establish requirements for solar thermal energy systems based on provisions in the
Uniform Solar, Hydronics and Geothermal
Code (USHGC), which is developed by the
International Association of Plumbing and
Mechanical Officials. The County of
Los Angeles is a densely populated area,
with elevated levels of greenhouse gas
emissions. Standards to regulate the
installation of solar thermal energy systems
will facilitate safe and efficient installations of
these systems to improve local air quality,
thereby improving the health of the County's
residents, businesses and visitors.

SECTION 33. This ordinance shall become operative on January 1, 2026. [TITLE28PLUMBCODE2025CSCC]
Enclosure C 320
HOA.105518232.11

ANALYSIS
This ordinance repeals those provisions of Title 29 – Mechanical Code – of the Los Angeles County Code that incorporated by reference portions of the 2022 California Mechanical Code and replaces them with provisions incorporating by reference portions of the 2025 California Mechanical Code, published by the California Building Standards Commission. Unless deleted or modified herein, the previously enacted provisions of Title 29 continue in effect.

State law requires that the County's Mechanical Code impose the same requirements as are contained in the building standards published in the most recent edition of the California Mechanical Code except for changes or modifications deemed reasonably necessary by the County because of local climatic, geological, or topographical conditions. The changes and modifications to the requirements contained in the building standards published in the 2025 California Mechanical Code that are contained in this ordinance are based upon express findings, contained in the ordinance, that such changes are reasonably necessary due to local climatic, geological, or topographical conditions. These changes and modifications are substantially equivalent to changes and modifications previously filed by the County of Los Angeles, which were in effect as of September 30, 2025.

This ordinance also makes certain modifications to the administrative provisions of Title 29.

DAWYN R. HARRISON
County Counsel
By
Margaret F. Ambrose
Principal Deputy County Counsel
Public Works Division
MFA:bc
Requested: 8/5/25
Revised: 10/8/25
Enclosure D 321
HOA.105518232.11
ORDINANCE NO.

An ordinance amending Title 29 – Mechanical Code – of the Los Angeles County Code by adopting and incorporating by reference portions of the 2025 California Mechanical Code with certain changes and modifications and making other revisions thereto.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Sections 119.1.2.0 through 119.1.14.0 of Chapter 1, Chapters 2 through 17, and Appendices B, C, and D, of this Title 29 of the Los Angeles County Code, which incorporated by reference and modified portions of the 2022 California Mechanical Code, are hereby repealed.

SECTION 2. Section 100 is hereby amended to read as follows:
100 ADOPTION AND INCORPORATION BY REFERENCE.

Except as hereinafter changed or modified, Sections 1.2.0 through 1.14.0 of Chapter 1, Division I, of that certain Mechanical Code known and designated as the 20222025 California Mechanical Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 29 of the Los Angeles County Code, as if fully set forth below, and shall be known as Sections 119.1.2.0 through 119.1.14.0, respectively, of Chapter 1 of Title 29 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 17, and Appendices B, C, and D, of that certain Mechanical Code known and designated as the 20222025 California Mechanical Code, as published by the California Building Enclosure D 322
HOA.105518232.11 2
Standards Commission, are adopted and incorporated by reference into this Title 29 of the Los Angeles County Code as if fully set forth below, and shall be known as Chapters 2 through 17, and Appendices B, C, and D, of Title 29 of the Los Angeles County Code.

A copy of the 20222025 California Mechanical Code shall be at all times maintained by the Chief Mechanical Inspector for use and examination by the public.

SECTION 3. Section 204.0 is hereby amended to read as follows:
204.0 – B –
. . .

Building Code. The building code that is adopted by this jurisdiction. [HCD1, HCD 2, OSHPD 1, 1R, 2, 3, 4, 5, 6 & SFM] "Building Code" shall mean the California Building Code, Title 24, Part 2most recent edition of Title 26 of the Los Angeles County Code.
. . .

SECTION 4. Section 207.0 is hereby amended to read as follows:
207.0 – E –
. . .

Electrical Code. The "Electrical Code" shall mean the National Electrical Code promulgated by the National Fire Protection Association, as adopted by this jurisdiction. [HCD 1 & HCD 2] Whenever the term "Electrical Code" is used in this code, it shall mean the California Electrical Code, Title 24, Part 3most recent edition of Title 27 of the Los Angeles County Code.

Enclosure D 323
HOA.105518232.11 3
. . .

SECTION 5. Section 218.0 is hereby amended to read as follows:
218.0 – P –
. . .

Plumbing Code. The "Plumbing Code" shall mean the Uniform Plumbing Code (UPC) promulgated by the International Association of Plumbing and Mechanical Officials (IAPMO), as adopted by this jurisdiction. [HCD 1 & HCD 2] Whenever the term "Plumbing Code" is used in this code, it shall mean the California Plumbing Code, Title 24, Part 5most recent edition of Title 28 of the Los Angeles County Code. . . .

SECTION 6. Section 302.2 is hereby amended to read as follows:
302.2 ALTERNATE MATERIALS AND METHODS OF
CONSTRUCTION EQUIVALENCYAND MODIFICATIONS.
302.2.1 Alternate Materials and Methods of Construction.

Enclosure D 324
HOA.105518232.11 4
302.2.1.1 Testing.
. . .
302.2.1.1.1 Tests.
. . .
302.2.1.21.2 Requests by the Authority Having Jurisdiction. . . .
302.2.1.2 Application. Application for the use of an alternate material or method of construction shall be submitted in writing to the Chief Mechanical Inspector together with a filing fee of $317.26. When staff review exceeds two hours, an additional fee of $158.63 per hour shall be charged for each hour, or fraction thereof, in excess of two hours.
302.2.2 Modifications. Whenever there are practical difficulties involved in carrying out the provisions of this Code, the Authority Having Jurisdiction shall have the authority to grant modifications on a case-by-case basis, upon application of the owner or the owner's authorized agent, provided that the Authority Having Jurisdiction shall first find that a special individual reason makes the strict letter of this Code impractical, and that the modification is in conformity with the spirit and purpose of this Code, and that such modification does not lessen any health, fire-protection, or other life-safety-related requirements. The details of any action granting modifications shall be recorded and entered in the files of the Authority Having Jurisdiction. The application for approval of a modification shall be in accordance with Section 302.2.1.2.

Enclosure D 325
HOA.105518232.11 5
SECTION 7. Section 501.1 is hereby amended to read as follows:
501.1 Applicability. This cChapter includes requirements for environmental air ducts, product-conveying systems, and commercial hoods and kitchen ventilation. Part I addresses environmental air ducts and product-conveying systems. Part II addresses commercial hoods and kitchen ventilation. Ventilation systems installed to control occupational health hazards shall comply with the requirements of the County Health Officer as defined in Title 11 of the Los Angeles County Code.

SECTION 8. Section 510.1.6 is hereby amended to read as follows:
510.1.6 Bracing and Supports. Duct bracing and supports shall be of noncombustible material, securely attached to the structure, not less than the gauge required for grease-duct construction, and designed to carry gravity and lateral loads within the stress limitations of the bBuilding cCode. Bolts, screws, rivets, and other mechanical fasteners shall not penetrate duct walls.

SECTION 9. Section 603.7.1.1 is hereby amended to read as follows:
603.7.1.1 Rectangular Ducts. Supports for rectangular ducts shall be installed on two opposite sides of each duct and shall be welded, riveted, bolted, or metal screwed to each side of the duct at intervals specified.

Enclosure D 326
HOA.105518232.11 6
SECTION 10. Section 1114.4 is hereby added to read as follows:
1114.4 Approvals Required. The method of discharge of systems containing other than group A1 refrigerants shall comply with the pertinent requirements of Title 32 (Fire Code) and Division 2 of Title 20 (Sanitary Sewer and Industrial Waste) of the Los Angeles County Code.

SECTION 11. The provisions of this ordinance contain various changes, modifications, and additions to the 2025 Edition of the California Mechanical Code.

Some of these changes are administrative in nature in that they do not constitute changes or modifications to requirements contained in the building standards published in the California Mechanical Code.

Pursuant to California Health and Safety Code sections 17958.5, 17958.7, and 18941.5, the Board of Supervisors hereby expressly finds that all of the changes and modifications to requirements contained in the building standards published in the California Building Standards Code contained in this ordinance are reasonably necessary because of local climatic, geological, or topographical conditions in the County of Los Angeles due to the potential for seismic activity in the region, topographical conditions that contribute to the spread of wild fires, and climatic conditions that impact air quality and increase the risk of wild fires. In addition, the Board of Supervisors expressly finds that the modifications herein are substantially equivalent to modifications that were previously filed by the County of Los Angeles and were in effect as of September 30, 2025. Without limiting the foregoing, the County makes additional findings herein:

Enclosure D 327
HOA.105518232.11 7
TABLE

MECHANICAL CODE AMENDMENTS

CODE SECTION CONDITION EXPLANATION
501.1 Climatic Additional Health
Department requirements
are necessary due to local
air quality concerns.
510.1.6 Geological High geologic activities,
such as seismic events, in
the Southern California
area necessitate this local
amendment for bracing
and support.
603.7.1.1 Geological High geologic activities,
such as seismic events, in
the Southern California
area necessitate this local
amendment for bracing
and support.
1114.4 Geological High geologic activities,
such as seismic events, in
the Southern California
area necessitate this local
amendment to reduce
damage and potential for
toxic refrigerant release
during a seismic event
caused by shifting
equipment and to minimize
impacts to the sewer
system in such an event.

SECTION 12. This ordinance shall become operative on January 1, 2026. [TITLE29MECHCODE2025CSCC]
Enclosure D 328
HOA.105522003.7

ANALYSIS
This ordinance repeals those provisions of Title 30 – Residential Code – of the Los Angeles County Code that incorporated by reference portions of the 2022 Edition of the California Residential Code, and the ordinance replaces them with provisions incorporating by reference portions of the 2025 California Residential Code, published by the California Building Standards Commission, with certain changes and modifications.

State law requires that the County adopt ordinances that contain the same requirements as are contained in the building standards published in the California Residential Code. State law allows the County to change or modify these requirements in compliance with section 17958 of the California Health and Safety Code.

The changes and modifications to requirements contained in the building standards published in the 2025 California Residential Code that are contained in this ordinance are based upon express findings, contained in the ordinance, that such changes are reasonably necessary due to local climatic, geological, or topographical conditions. These changes and modifications are substantially equivalent to changes or modifications previously filed with the California Building Standards Commission by the County of Los Angeles, which were in effect as of September 30, 2025, or that relate to home hardening, in compliance with recent changes to section 17958 of the California Health and Safety Code.

DAWYN R. HARRISON
County Counsel
By
MARGARET F. AMBROSE
Principal Deputy County Counsel
MFA/CBS:bc
Requested: 08/04/25
Revised: 10/22/25
Enclosure E 329
HOA.105522003.7
ORDINANCE NO. ____________
An ordinance amending Title 30 – Residential Code – of the Los Angeles County Code, by adopting and incorporating by reference the 2025 California Residential Code, with certain changes and modifications.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Chapters 2 through 10, Chapter 44, and Appendices AH, AQ, AS, and AZ, of Title 30 of the Los Angeles County Code, which incorporate by reference, and modify, portions of the 2022 California Residential Code, are hereby repealed.

SECTION 2. Chapter 1 is hereby amended to read as follows:

R100 ADOPTION AND INCORPORATION BY REFERENCE
Except as hereinafter changed or modified, Sections 102 through 119 of Chapter 1, Section 1206 of Chapter 12, and Chapters 67, 68, 69, 98, 99, and Appendix J, of Title 26 of the Los Angeles County Code are adopted and incorporated by reference into this Title 30 as if fully set forth below, and shall be known as Sections 102 through 119 of Chapter 1, Section 1206 of Chapter 12, and Chapters 67, 68, 69, 98, 99, and Appendix J, of Title 30 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 10, Chapter 44, and Appendices AH, AQ, AS, and AZBB, BF, BJ, and CJ, of that certain code known and designated as the 20222025 California Residential Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 30 as if fully set forth below, and shall be known as Chapters 2 through 10, Enclosure E 330
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Chapter 44, and Appendices AH, AQ, AS, and AZBB, BF, BJ, and CJ, of Title 30 of the Los Angeles County Code. A copy of the 20222025 California Residential Code shall be at all times maintained by the Building Official for use and examination by the public.

R101 TITLE, PURPOSE, AND INTENT
. . .

R101.3 Scope.

The provisions of this Code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, demolition, and grading of detached one- and two-family dwellings and townhouses not more than three stories above grade plane in height with a separate means of egress and their accessory structures that are located within the unincorporated territory of the County of Los Angeles and to such work or use by the County of Los Angeles in any incorporated city.

Exceptions:
. . .

2. Owner-occupied lodging houses with five or fewer guestrooms shall be permitted to be constructed in accordance with the Los Angeles County Residential Code for one- and two-family dwellings when equipped with a fire sprinkler system in accordance with Section R313R309.
. . .

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SECTION 3. Section R301.1.3.2 is hereby amended to read as follows:

R301.1.3.2 Woodframe structures greater than two-stories.

The bBuilding oOfficial shall require construction documents to be approved and stamped by a California licensed architect or engineer for all dwellings of woodframe construction more than two stories and basement in height located in Seismic Design Category A, B, or C. Notwithstanding other sections of law, the law establishing these provisions is found in Business and Professions Code Sections 5537 and 6737.1.

The Building Official shall require construction documents to be approved and stamped by a California licensed architect or engineer for all structural aspects of dwellings of woodframe construction more than one story in height or with a basement located in Seismic Design Category D0, D1, or D2 or E.

SECTION 4. Section R301.1.5 is hereby added to read as follows:

R301.1.5 Seismic design provisions for buildings constructed on or into slopes steeper than one unit vertical in three units horizontal (33.3 percent slope).

The design and construction of new buildings and additions to existing buildings when constructed on or into slopes steeper than one unit vertical in three units horizontal (33.3 percent slope) shall comply with Section 1613.6 of the Los Angeles County Building Code.

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SECTION 5. Section R301.2 is hereby amended to read as follows:

R301.2 Climatic and geographic design criteria.

Buildings shall be constructed in accordance with the provisions of this cCode as limited by the provisions of this sSection. Additional criteria shall be established by the local jurisdiction and set forthConsult with the Building Official regarding additional criteria in Table R301.2.

SECTION 6. Section R301.2.2.6 is hereby amended to read as follows:

R301.2.2.6 Irregular buildings.
. . .

1. Shear wall or braced wall offsets out of plane. Conditions where exterior shear wall lines or braced wall panels are not in one plane vertically from the foundation to the uppermost story in which they are required.

Exception: For wood light-frame construction, floors with cantilevers or setbacks not exceeding four times the nominal depth of the wood floor joists are permitted to support braced wall panels that are out of plane with braced wall panels below provided that all of the following are satisfied:

1. Floor joists are nominal 2 inches by 10 inches (51 mm by 254 mm) or larger and spaced not more than 16 inches (406 mm) on center.

2. The ratio of the back span to the cantilever is not less than 2 to 1.

3. Floor joists at ends of braced wall panels are doubled.

4. For wood-frame construction, a continuous rim joist is connected to ends of cantilever joists. Where spliced, the rim joists shall be spliced using a galvanized Enclosure E 333
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metal tie not less than 0.058 inch (1.5 mm) (16 gage) and 11/2 inches (38 mm) wide fastened with six 16d nails on each side of the splice; or a block of the same size as the rim joist and of sufficient length to fit securely between the joist space at which the splice occurs, fastened with eight 16d nails on each side of the splice.

5. Gravity loads carried at the end of cantilevered joists are limited to uniform wall and roof loads and the reactions from headers having a span of 8 feet (2438 mm) or less.

2. Lateral support of roofs and floors. Conditions where a section of floor or roof is not laterally supported by shear walls or braced wall lines on all edges.

Exception: Portions of floors that do not support shear walls, braced wall panels above, or roofs shall be permitted to extend not more than 6 feet (1829 mm) beyond a shear wall or braced wall line.

3. Shear wall or braced wall offsets in plane. Conditions where the end of a braced wall panel occurs over an opening in the wall below and extends more than 1 foot (305 mm) horizontally past the edge of the opening. This provision is applicable to shear walls and braced wall panels offset in plane and to braced wall panels offset out of plane in accordance with the exception to Item 1.

Exception: For wood light-frame wall construction, one end of a braced wall panel shall be permitted to extend more than 1 foot (305 mm) over an opening not more than 8 feet (2438 mm) in width in the wall below provided that the opening includes a header in accordance with all of the following:

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1. The building width, loading condition and framing member species limitations of Table R602.7(1) shall apply.

2. The header is composed of:

2.1 Not less than one 2x12 or two 2x10 for an opening not more than 4 feet (1219 mm) wide.

2.2. Not less than two 2x12 or three 2x10 for an opening not more than 6 feet (1829 mm) in width.

2.3. Not less than three 2x12 or four 2x10 for an opening not more than 8 feet (2438 mm) in width.

3. The entire length of the braced wall panel does not occur over an opening in the wall below.

4. Floor and roof opening. Conditions where an opening in a floor or roof exceeds the lesser of 12 feet (3658 mm) or 50 percent of the least floor or roof dimension.

5. Floor level offset. Conditions where portions of a floor level are vertically offset.

Exceptions:

1. Framing supported directly by continuous foundations at the perimeter of the building.

2. For wood light-frame construction, floors shall be permitted to be vertically offset where the floor framing is lapped or tied together as required by section R502.6.1. . . .

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SECTION 7. Section R301.2.2.11 is hereby added to read as follows:

R301.2.2.11 Anchorage of mechanical, electrical, or plumbing components and equipment.

Mechanical, electrical, or plumbing components and equipment shall be anchored to the structure. Anchorage of the components and equipment shall be designed to resist loads in accordance with the Los Angeles County Building Code and ASCE 7, except where the component is positively attached to the structure and flexible connections are provided between the component and associated ductwork, piping, and conduit; and either:

1. The component weighs 400 pounds (1,780 N) or less and has a center of mass located 4 feet (1.22 m) or less above the supporting structure; or

2. The component weighs 20 pounds (89N) or less or, in the case of a distributed system, 5 pounds per foot (73 N/m) or less.

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SECTION 8. Table R302.1(2) is hereby amended to read as follows:

For SI: 1 foot = 304.8 mm
NA = Not Applicable.
a. Reserved.For residential subdivisions where all dwellings and townhouses are equipped throughout with an automatic sprinkler system installed in accordance with Section R309, the fire separation distance for exterior walls not fire-resistance rated and for fire-resistance-rated projections shall be permitted to be reduced to 0 feet, and unlimited unprotected openings and penetrations shall be permitted, where the adjoining lot provides an open setback yard that is 6 feet or more in width on the opposite side of the property line. . . .

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SECTION 9. Section R337.1 is hereby added to read as follows:

R337.1 Modifications to the California Wildland-Urban Interface Code.

Chapter 5 of the California Wildland-Urban Interface Code shall be modified as indicated in Sections 337.1.1 through 337.1.7 and shall apply to all buildings and structures as provided in this section.

SECTION 10. Section R337.1.1 is hereby added to read as follows:
337.1.1 California Wildland-Urban Interface Code, Section 501.1.

Modify the California Wildland-Urban Interface Code Section 501.1 to read as follows:
501.1 Scope and Application.

New bBuildings and structures in a wildland-urban interface area shall be constructed in accordance with the California Building Residential Code and this Code.

Additions, alterations, or repairs made to existing buildings erected, constructed, or moved within a Fire Hazard Severity Zone or Wildland-Urban Interface area shall be constructed in accordance with the Residential Code and this code. New buildings for which an application for a building permit is submitted on or after July 1, 2008, and any additions, alterations, or repairs made to existing buildings for which an application for a building permit is submitted on or after January 1, 2026, located in any Fire Hazard Severity Zone or Wildland-Urban Interface area shall comply with all sections of the Residential Code and this Code.

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Exceptions:

1. Group U accessory structures not exceeding 120 square feet (11m2) in floor area where located not less than 50 feet (15 240 mm) from applicable buildings.

2. Group U agricultural buildings not less than 50 feet (15 240 mm) from applicable buildings.
501.1.1 Alternates for materials, design, tests, and methods of construction.

The Building Official is permitted to modify the provisions of this Chapter for sitespecific conditions in accordance with Chapter 1, Section 104.2.2 of the California Wildland-Urban Interface Code.

SECTION 11. Section R337.1.2 is hereby added to read as follows:
337.1.2 California Wildland-Urban Interface Code, Section 503.1 Modify the California Wildland-Urban Interface Code Section 503.1 to read as follows:
503.1 General.

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Exceptions:

1. New accessory buildings and miscellaneous structures complying with Section 504.11.

2. Reserved.Additions to and remodels of buildings originally constructed prior to July 1, 2008.

3. Group C occupancy special buildings conforming to the limitations specified in Section 450.4.1 of the California Building Code.

SECTION 12. Section R337.1.3 is hereby added to read as follows:
337.1.3 California Wildland-Urban Interface Code,
Section 503.2.3
Modify the California Wildland-Urban Interface Code Section 503.2.3 to read as follows:
503.2.3 Reserved.Fire-retardant-treated wood roof coverings.

SECTION 13. Section R337.1.4 is hereby added to read as follows:
337.1.4 California Wildland-Urban Interface Code,
Section 503.3.1
Modify the California Wildland-Urban Interface Code Section 503.3.1 to read as follows:

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503.3.1 Qualification by testing.

SECTION 14. Section R337.1.5 is hereby added to read as follows:
337.1.5 California Wildland-Urban Interface Code,
Section 503.3.4
Modify the California Wildland-Urban Interface Code Section 503.3.4 to read as follows:
503.3.4 Reserved.Fire-retardant-treated wood shingles and shakes.

Fire-retardant-treated wood shingles and shakes shall be approved and listed by the State Fire Marshal in accordance with Section 208(c), Title 19 California Code of Regulations.

SECTION 15. Section R337.1.6 is hereby added to read as follows:
337.1.6 California Wildland-Urban Interface Code,
Section 504.2.1
Modify the California Wildland-Urban Interface Code Section 504.2.1 to read as follows:

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504.2.1 Roof covering voids.

SECTION 16. Section R337.1.7 is hereby added to read as follows:
337.1.7 California Wildland-Urban Interface Code,
Section 504.5.2
Modify the California Wildland-Urban Interface Code Section 504.5.2 to read as follows:
504.5.2 Exterior wall coverings.

Exterior wall coverings shall comply with one or more of the following requirements:

1. Noncombustible material.

2. Ignition-resistant building material labeled for exterior use.

3. Fire-retardant treated wood labeled for exterior use and complying with the requirements of Section 2303.2 of the California Building Code.

4. Reserved.Fire-retardant-treated wood shingles and shakes which have been qualified in accordance with Section 1505.6 of the California Building Code for use as “Class B” roof covering shall be an acceptable alternative wall covering material where installed over solid sheathing.

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Exception:

Exterior wall coverings which are a component of an approved wall assembly complying with Section 504.5.

SECTION 17. Section R401.1 is hereby amended to read as follows:

R401.1 Application.
. . .

Wood foundations in Seismic Design Category D0, D1, or D2 shall be designed in accordance with accepted engineering practicenot be permitted.

Exception: In non-occupied, single-story, detached storage sheds and similar uses other than carport or garage, provided the gross floor area does not exceed 200 square feet, the plate height does not exceed 12 feet in height above the grade plane at any point, and the maximum roof projection does not exceed 24 inches.

SECTION 18. Section R403.1.2 is hereby amended to read as follows:

R403.1.2 Continuous footing in seismic design categories D0, D1 and D2.

Exterior walls and required interior braced wall panels of buildings located in Seismic Design Categories D0, D1 and D2 shall be supported by continuous solid or fully grouted masonry or concrete footings in accordance with Table R403.1.2. Other footing materials or systems shall be designed in accordance with accepted engineering practice.

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SECTION 19. Section R403.1.3.6 is hereby amended to read as follows:

R403.1.3.6 Isolated concrete footings.

In detached one- and two-family dwellings located in Seismic Design Category A, B, or C that are three stories or less in height and constructed with stud bearing walls, isolated plain concrete footings supporting columns or pedestals are permitted.

SECTION 20. Section R403.1.5 is hereby amended to read as follows:

R403.1.5 Slope.

The top surface of footings shall be level. The bottom surface of footings shall not have a slope exceeding 1 unit vertical in 10 units horizontal (10-percent slope).

Footings shall be stepped where it is necessary to change the elevation of the top surface of the footings or where the slope of the bottom surface of the footings will exceed one unit vertical in 10 units horizontal (10-percent slope).

For structures located in Seismic Design Category D0, D1, or D2, stepped footings shall be reinforced with two No. 4 reinforcing bars. Two bars shall be located at the top and bottom of the footings as shown in Figure R403.1.5.

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SECTION 21. Figure R403.1.5 is hereby added to read as follows:

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SECTION 22. Section R404.2 is hereby amended to read as follows:

R404.2 Wood foundation walls.

Wood foundation walls shall be constructed in accordance with the provisions of Sections R404.2.1 through R404.2.6 and with the details shown in Figures R403.1(2) and R403.1(3). Wood foundation walls shall not be used for structures located in Seismic Design Category D0, D1, or D2.

SECTION 23. Section R501.2 is hereby amended to read as follows:

R501.2 Requirements.

Floor construction shall be capable of accommodating all loads in accordance with Section R301 and of transmitting the resulting loads to the supporting structural elements. Mechanical or plumbing fixtures and equipment shall be attached or anchored to the structure in accordance with Section R301.2.2.11.

SECTION 24. Section R503.2.4 is hereby added to read as follows:

R503.2.4 Openings in horizontal diaphragms.

Openings in horizontal diaphragms with a dimension perpendicular to the joist that is greater than 4 feet (1.2 m) shall be constructed in accordance with Figure R503.2.4.

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SECTION 25. Figure R503.2.4 is hereby added to read as follows:

FIGURE R503.2.4

OPENING IN HORIZONTAL DIAPHRAGMS
Notes:
a. Blockings shall be provided beyond headers.
b. Metal ties not less than 0.058 inch [1.47 mm (16 galvanized gage)] by

1.5 inches (38 mm) wide with eight 16d common nails on each side of the header-joist intersection. The metal ties shall have a minimum yield of 33,000 psi (227 MPa). c. Openings in diaphragms shall be further limited in accordance with Section R301.2.2.6.

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SECTION 26. Table R602.3(1) is hereby amended to read as follows:

TABLE R602.3(1) -- FASTENING SCHEDULE
. . .
a. Nails are smooth-common, box or deformed shanks except where otherwise stated. Nails used for framing and sheathing connections are carbon steel and shall have minimum average bending yield strengths as shown: 80 ksi for shank diameter of 0.192 inch (20d common nail), 90 ksi for shank diameters larger than 0.142 inch but not larger than 0.177 inch, and 100 ksi for shank diameters of 0.142 inch or less. Connections using nails and staples of other materials, such as stainless steel, shall be designed by accepted engineering practice or approved under Section R104.2.2104.2.8. Use of staples in roof, floor, subfloor, and braced wall panels shall be prohibited in Seismic Design Category D0, D1, or D2.
. . .

SECTION 27. Table R602.3(2) is hereby amended to read as follows:

TABLE R602.3(2)
ALTERNATE ATTACHMENTS TO TABLE R602.3(1)
. . .
b. Staples shall have a minimum crown width of 7/16-inch except as noted. Use of staples in roof, floor, subfloor, and braced wall panels shall be prohibited in Seismic Design Category D0, D1, or D2.
. . .

SECTION 28. Section R602.3.2 is hereby amended to read as follows:

R602.3.2 Top plate.
. . .

Exception: In other than Seismic Design Category D0, D1, or D2, aA single top plate used as an alternative to a double top plate shall comply with the following:
. . .

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SECTION 29. Table R602.3.2 is hereby amended to read as follows:

SECTION 30. Section R602.10.2.3 is hereby amended to read as follows:

R602.10.2.3 Minimum number of braced wall panels.

Braced wall lines with a length of 16 feet (4877 mm) or less shall have not less than two braced wall panels of any length or one braced wall panel equal to 48 inches (1219 mm) or more. Braced wall lines greater than 16 feet (4877 mm) shall have not less than two braced wall panels. In Seismic Design Category D0, D1, or D2, no braced wall panel shall have a contributing length less than 48 inches in length or as required in Section R602.10.3, whichever is greater.

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SECTION 31. Table R602.10.3(3) is hereby amended to read as follows:

TABLE R602.10.3(3)

BRACING REQUIREMENTS BASED ON SEISMIC DESIGN CATEGORY
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For SI: 1 inch – 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa.

NP – Not Permitted
. . .
i. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC D0, D1 and D2.

Methods DWB, SFB, PBS, and HPS are not permitted in D0, D1 or D2.

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SECTION 32. Table R602.10.4 is hereby amended to read as follows:

TABLE R602.10.4

BRACING METHODS
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SECTION 33. Table R602.10.5 is hereby amended to read as follows:

TABLE R602.10.5

MINIMUM LENGTH OF BRACED WALL PANELS
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. . .

TABLE R602.10.5

MINIMUM LENGTH OF BRACED WALL PANELS
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.

NP = Not Permitted.

METHOD
(See Table R602.10.4)
MINIMUM LENGTHa
(inches)

CONTRIBUTING LENGTH
Wall Height (inches)
8 feet 9 feet 10 feet 11 feet 12 feet
DWB, WSP, SFB, PBS, PCP, HPS, BV-WSP 48 48 48 53 58 Actualb GB 48 48 48 53 58 Double sided = Actual
Single sided = 0.5 × Actual
LIB 55 62 69 NP NP Actualb
ABW
SDC A, B and C, ultimate
design
wind speed < 140 mph
28 32 34 38 42
48 SDC D0, D1 and D2, ultimate
design
wind speed < 140 mph
32 32 34 NP NP
CS-G 24 27 30 33 36 Actualb

CS-WSP, CS-SFB
Adjacent clear opening height
(inches)

d 64 24 27 30 33 36
Actualb
68 26 27 30 33 36
72 27 27 30 33 36
76 30 29 30 33 36
80 32 30 30 33 36
84 35 32 32 33 36
88 38 35 33 33 36
92 43 37 35 35 36
96 48 41 38 36 36
100 — 44 40 38 38
104 — 49 43 40 39
108 — 54 46 43 41
112 — — 50 45 43
116 — — 55 48 45
120 — — 60 52 48
124 — — — 56 51
128 — — — 61 54
132 — — — 66 58
136 — — — — 62
140 — — — — 66
144 — — — — 72
METHOD
(See Table R602.10.4)
Portal header height
8 feet 9 feet 10 feet 11 feet 12 feet
PFH Supporting roof only 16 24 16 24 16 24 Note c Note c 48 Supporting one story and roof 24 24 24 Note c Note c
PFG 24 27 30 Note d Note d 1.5 × Actualb
CS-PF SDC A, B and C 16 18 20 Note e Note e 1.5 × Actualb SDC D0, D1 and D2 16 24 18 24 20 24 Note e Note e Actualb Enclosure E 355
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SECTION 34. Figure R602.10.6.1 is amended to read as follows:

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SECTION 35. Figure R602.10.6.2 is hereby amended to read as follows:

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SECTION 36. Figure R602.10.6.4 is hereby amended to read as follows:

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SECTION 37. Section R606.4.4 is hereby amended to read as follows:

R606.4.4 Parapet walls.

Unreinforced solid masonry parapet walls shall not be less than 8 inches (203 mm) thick and their height shall not exceed four times their thickness.

Unreinforced hollow unit masonry parapet walls shall be not less than 8 inches (203 mm) thick, and their height shall not exceed three times their thickness. Masonry parapet walls in areas subject to wind loads of 30 pounds per square foot (1.44 kPa), or located in Seismic Design Category D0, D1, or D2, or on townhouses in Seismic Design Category C shall be reinforced in accordance with Section R606.12.

SECTION 38. Section R606.12.2.2.3 is hereby amended to read as follows:

R606.12.2.2.3 Reinforcement requirements for masonry elements.

Masonry elements listed in Section R606.12.2.2.2 shall be reinforced in either the horizontal or vertical direction as shown in Figure R606.11(2) and in accordance with the following:

1. Horizontal reinforcement. Horizontal joint reinforcement shall consist of not less than two longitudinal W1.7 wires spaced not more than 16 inches (406 mm) for walls greater than 4 inches (102 mm) in width and not less than one longitudinal W1.7 wire spaced not more than 16 inches (406 mm) for walls not exceeding 4 inches (102 mm) in width; ornot less than one No. 4 bar spaced not more than 48 inches (1219 mm). Where two longitudinal wires of joint reinforcement are used, the space between these wires shall be the widest that the mortar joint will Enclosure E 359
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accommodate.Horizontal reinforcement shall be provided within 16 inches (406 mm) of the top and bottom of these masonry elements.

2. Vertical reinforcement. Vertical reinforcement shall consist of not less than one No. 4 bar spaced not more than 48 inches (1219 mm). Vertical reinforcement shall be located within 168 inches (406203 mm) of the ends of masonry walls.

SECTION 39. Section R803.2.4 is hereby added to read as follows:

R803.2.4 Openings in horizontal diaphragms.

Openings in horizontal diaphragms shall conform with Section R503.2.4.

SECTION 40. Section R1001.3.1 is hereby amended to read as follows:

R1001.3.1 Vertical reinforcing.

For chimneys up to 40 inches (1016 mm) wide, four No. 4 continuous vertical bars adequately anchored into the concrete foundation shall be placed between wythes of solid masonry or within the cells of hollow unit masonry and grouted in accordance with Section R606. Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion. For chimneys more than 40 inches (1016 mm) wide, two additional No. 4 vertical bars adequately anchored into the concrete foundation shall be provided for each additional flue incorporated into the chimney or for each additional 40 inches (1016 mm) in width or fraction thereof.

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SECTION 41. Section BJ106.1 is hereby amended to read as follows:

BJ106.1 General.

In other than Seismic Design Category D0, D1, D2, E, or F, pPlastered strawbale walls shall be permitted to be used as structural walls in accordance with the prescriptive provisions of this sSection.

SECTION 42. Section CJ101.1 is hereby amended to read as follows:

CJ101.1 Scope.

This appendix shall be applicableapplies to emergency housing and emergency housing facilities, as defined in Section CJ102, when and to the extent that the County of Los Angeles Board of Supervisors ("Board") finds, by motion, resolution, or otherwise, that this appendix applies to a specific state of emergency, local emergency, or declaration of shelter crisis.

SECTION 43. Section CJ102.1 is hereby amended to read as follows:

CJ102.1 General.
. . .

ENFORCING AGENCY. The Building Official as defined in Section 104.3 of this Code.
. . .

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SECTION 44. Section CJ103.1 is hereby amended to read as follows:

CJ103.1 General.

SECTION 45. Section CJ103.4 is hereby amended to read as follows:

CJ103.4 Fire and life safety requirements not addressed in this appendix.

If not otherwise addressed in this appendix, fire and life safety measures, including, but not limited to, means of egress, fire separation, fire sprinklers, smoke alarms, and carbon monoxide alarms, shall be determined and enforced by the enforcing agency in consultation with the Departments of Public Health, Fire, and other pertinent County departments, as applicable.

SECTION 46. Section CJ106.1 is hereby amended to read as follows:

CJ106.1 General.
. . .

Tents and membrane structures shall be provided with means of ventilation (natural and/or mechanical) allowing for adequate air replacement, as determined by the enforcing agency.

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SECTION 47. Section CJ107.1 is hereby amended to read as follows:

CJ107.1 General.

Emergency housing shall comply with the applicable requirements in the California Building Code, Chapter 11B and/or the US Access Board Final Guidelines for Emergency Transportable Housing as determined by the enforcing agency. . . .

SECTION 48. Section CJ110.1.1 is hereby added to read as follows:

CJ110.1.1 Backflow prevention.

Backflow prevention devices shall be provided in accordance with Section 602.3 of the Plumbing Code.

SECTION 49. Section CJ110.1.2 is hereby added to read as follows:

CJ110.1.2 Drinking fountains.

An adequate number of drinking fountains, bottle fillers or drinking facilities shall be provided as determined by the enforcing agency.

SECTION 50. Section CJ110.3 is hereby amended to read as follows:

CJ110.3 Toilet and bathing facilities.
. . .

The maximum travel distance from any sleeping and/or living area to the toilet facility shall not exceed 300 feet (91.4 m) or as determined by the enforcing agency.

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SECTION 51. The provisions of this ordinance contain various changes, modifications, and additions to the 2025 Edition of the California Residential Code.

Pursuant to California Health and Safety Code sections 17958.5, 17958.7, and 18941.5, the Board of Supervisors hereby expressly finds that all of the changes and modifications to requirements contained in the building standards published in the California Building Standards Code contained in this ordinance are reasonably necessary because of local climatic, geological, or topographical conditions in the County of Los Angeles due to the potential for seismic activity in the region, topographical conditions that contribute to the spread of wild fires, and climatic conditions that impact air quality and increase the risk of wild fires. In addition, the Board of Supervisors expressly finds that the modifications herein are substantially equivalent to modifications that were previously filed by the County of Los Angeles and were in effect as of September 30, 2025, or that relate to home hardening. Without limiting the foregoing, the County makes additional findings herein:

Code
Section
Condition Explanation of Amendment
R301.1.3.2 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. After the 1994 Northridge
Earthquake, the Wood Frame Construction Joint Task
Force recommended that the quality of woodframe
construction needed to be greatly improved. The
Task Force recommended that structural plans be
prepared by the engineer or architect so that plan
Enclosure E 364
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Code
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Condition Explanation of Amendment
examiners, building inspectors, contractors, and
special inspectors may logically follow and construct
the seismic force-resisting systems as presented in
the construction documents. For buildings or
structures located in Seismic Design Category D0, D1,
D2, or E that are subject to a greater level of seismic forces, the requirement to have a California licensed
architect or engineer prepare the construction
documents is intended to minimize or reduce
structural deficiencies that may cause excessive
damage or injuries in woodframe buildings.

Involvement of a registered professional will minimize
the occurrence of structural deficiencies such as plan
and vertical irregularities, improper shear transfer of the seismic force-resisting system, missed details or
connections important to the structural system, and
the improper application of the prescriptive
requirements of the California Residential Code.

R301.1.5 Geological
Topographical
Due to the local topographical and geological
conditions of the sites within the greater Los Angeles
region and their susceptibility to earthquakes, this
technical amendment is required to address and
clarify special needs for buildings constructed on
hillside locations. A joint Structural Engineers
Association of Southern California (SEAOSC) and
Los Angeles City Joint Task Force investigated the
performance of hillside building failures after the
Northridge Earthquake. Numerous hillside failures
resulted in loss of life and millions of dollars in
damage. These criteria were developed to minimize
the damage to these structures and have been in use
by the City and County of Los Angeles for several
years.

R301.2.2.6 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. Due to the high geologic activities in the Southern California area and the necessary
higher level of performance required for buildings and
structures, this local amendment limits the type of
irregular conditions as specified in the California
Residential Code. Such limitations are recommended
to reduce structural damage in the event of an
Enclosure E 365
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Condition Explanation of Amendment
earthquake. The County of Los Angeles and cities in
this region have implemented these extra measures
to maintain the structural integrity of the framing of
the shear walls and all associated elements when
designed for high levels of seismic loads.

R301.2.2.11 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. Due to the high geologic activity in
the Southern California area and the necessary
higher level of performance required for buildings and
structures, this local amendment limits the potential
anchorage and supporting frame failure resulting from
additional weight. There is no limitation for weight of mechanical and plumbing fixtures and equipment in
the International Residential Code. Requirements
from ASCE 7 and the International Building Code
would permit equipment weighing up to 400 lbs. when
mounted at 4 feet or less above the floor or attic level without engineering design. Where equipment
exceeds this requirement, it is the intent of this
amendment that a registered design professional be
required to analyze if the floor support is adequate
and structurally sound.

Table
R302.1(2)
Climatic This amendment will not allow unprotected openings (openings that do not resist the spread of fire) to be in the exterior wall of a residential building that is
located on a property line. This amendment is
necessary due to local climatic conditions. The hot,
dry weather conditions of late summer in combination
with the Santa Ana winds creates an extreme fire
danger. Residential buildings with unprotected
openings located on a property line may permit fires
to spread from the inside of the building to adjacent
properties and likewise from exterior properties to the interior of the building.

R337.1.1
R337.1.2
Climatic Clarifies the application of Chapter 5 of the California Wildland Interface Code to harden additions,
alterations, and/or relocated buildings. Many areas of
the County have been designated as Fire Hazard
Severity Zones due to the increased risk of fire
caused by low humidity, strong winds, and dry
vegetation. Additions, alterations, and/or relocated
Enclosure E 366
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Code
Section
Condition Explanation of Amendment
buildings have the same fire risk as new buildings.

R337.1.3
R337.1.5
R337.1.6
Climatic Disallows the use of wood-shingle/wood-shake roofs due to the increased risk of fire in the County caused
by low humidity, strong winds, and dry vegetation in
high fire severity zones in order to further harden
residential buildings against fire risk.

R337.1.7 Climatic Disallows the use of Class B wood-shingle/woodshake roofs due to the increased risk of fire in the County caused by low humidity, strong winds, and dry
vegetation in high fire severity zones in order to
further harden residential buildings against fire risk.

The required seismic anchorage and transfer of
lateral forces into the foundation system necessary
for 2-story structures and foundation walls could
become compromised at varying states of wood
decay. In addition, global structure overturning
moment and sliding resistance is reduced when
utilizing wood foundations as opposed to
conventional concrete or masonry systems.

However, non-occupied, single-story storage
structures pose significantly less risk to human safety and may utilize the wood foundation guidelines
specified in this Chapter.

Interior walls can easily be called upon to resist over half of the seismic loading imposed on simple
buildings or structures. Without a continuous
foundation to support the braced wall line, seismic
Enclosure E 367
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Code
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Condition Explanation of Amendment
loads would be transferred through other elements
such as non-structural concrete slab floors, wood
floors, etc. Requiring interior braced walls to be
supported by continuous foundations is intended to
reduce or eliminate the poor performance of buildings
or structures.

R404.2 Climatic
Geological
No substantiating data has been provided to show
that wood foundations are effective in supporting
structures and buildings during a seismic event while
being subject to deterioration caused by the presence
of water and other materials detrimental to wood
foundations in the soil. Wood foundations, when they
are not properly treated and protected against
deterioration, have performed very poorly and have
led to slope failures. Most contractors are typically
accustomed to construction in dry weather in the
Southern California region and are not generally
familiar with the necessary precautions and treatment
of wood that makes it suitable for both seismic events
and wet applications. With the higher seismic
demand placed on buildings and structures in this
region, coupled with the dryer weather conditions, it is the intent of this amendment to reduce or eliminate
potential problems resulting from the use of wood
footings and foundations.

R501.2 Geological Due to the high geologic activities in the Southern California area and the necessary higher level of
performance required for buildings and structures,
this local amendment limits the potential anchorage
and supporting frame failure resulting from additional
weight. There is no limitation for weight of
mechanical and plumbing fixtures and equipment in
the International Residential Code. Requirements
from ASCE 7 and the International Building Code
would permit equipment weighing up to 400 lbs. when
mounted at 4 feet or less above the floor or attic level without engineering design. Where equipment
exceeds this requirement, it is the intent of this
amendment that a registered design professional be
required to analyze if the floor support is adequate
and structurally sound.

Enclosure E 368
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Code
Section
Condition Explanation of Amendment
R503.2.4
Figure
R503.2.4
Geological Section R502.10 of the Code does not provide any prescriptive criteria to limit the maximum floor
opening size, nor does Section R503 provide any
details to address the issue of shear transfer near
larger floor openings. With the higher seismic
demand placed on buildings and structures in this
region, it is important to ensure that a complete load
path is provided to reduce or eliminate potential
damage caused by seismic forces. Requiring
blocking with metal ties around larger floor openings
and limiting opening size is consistent with the
requirements of Section R301.2.2.6.

Table
R602.3(1)
Table
R602.3(2)
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. In September 2007, limited cyclic
testing data was provided to the ICC Los Angeles
Chapter Structural Code Committee showing that
stapled wood structural shear panels do not exhibit
the same behavior as the nailed wood structural
shear panels. The test results of the stapled wood
structural shear panels demonstrated lower strength
and drift than the nailed wood structural shear panel
test results. Therefore, the use of staples as
fasteners for shear walls sheathed with other
materials shall not be permitted without being
substantiated by cyclic testing.

R602.3.2
Table
R602.3.2
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. The County of Los Angeles and
cities in this region have taken extra measures to
maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic
loads by eliminating single top plate construction.

The performance of modern day braced wall panel
construction is directly related to an adequate load
path extending from the roof diaphragm to the
foundation system.

R602.10.2.3 Geological The greater Los Angeles region is a densely populated area having buildings and structures
constructed over and near a vast array of fault
systems capable of producing major earthquakes,
including, but not limited, to the 1994 Northridge
Enclosure E 369
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Code
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Condition Explanation of Amendment
Earthquake. Plywood shear walls with high aspect
ratio experienced many failures during the Northridge
Earthquake. This proposed amendment specifies a
minimum braced wall length to meet an aspect ratio
consistent with other sections of the California
Residential Code, and to assure that new buildings
and additions to existing buildings are designed and
constructed in accordance with the scope and
objectives of the California Residential Code. This is
intended to improve the performance level of
buildings and structures that are subject to the higher seismic demands and reduce and limit potential
damage to property. This proposed amendment
reflects the recommendations by SEAOSC and the
Los Angeles City Joint Task Force that investigated
the poor performance observed during the 1994
Northridge Earthquake.

Table
R602.10.3(3
)
Geological Due to the high geologic activities in the Southern California area and the necessary higher level of
performance of buildings and structures, this local
amendment reduces or eliminates the allowable
shear values for shear walls sheathed with lath,
plaster, or gypsum board. The poor performance of
such shear walls sheathed with other materials in the
1994 Northridge Earthquake was investigated by
SEAOSC and the Los Angeles City Joint Task Force.

The County of Los Angeles and cities in this region
have taken extra measures to maintain the structural
integrity of the framing of the shear walls when
designed for high levels of seismic loads.

Table
R602.10.4
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. This
amendment specifies minimum WSP sheathing
thickness and nail size and spacing, so as to provide
a uniform standard of construction to improve the
performance level of buildings and structures, given
the potential for higher seismic demands placed on
buildings or structure in this region. This proposed
amendment reflects the recommendations by
SEAOSC and the Los Angeles City Joint Task Force
following the 1994 Northridge Earthquake. In
September 2007, cyclic testing data was provided to
Enclosure E 370
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Code
Section
Condition Explanation of Amendment
the Los Angeles Chapter Structural Code Committee
showing that stapled wood structural shear panels
underperformed nailed wood structural shear panels.

Test results of the stapled wood structural shear
panels appeared much lower in strength and drift
than the nailed wood structural shear panel test
results.

Table
R602.10.5
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. The poor performance of such shear
walls sheathed in the 1994 Northridge Earthquake
was investigated by SEAOSC and the Los Angeles
City Joint Task Force. The County of Los Angeles
and cities in this region have taken extra measures to
maintain the structural integrity with respect to the
"maximum shear wall aspect ratios" of the framing of
the shear walls when designed for high levels of
seismic loads. This amendment is consistent with the
shear wall aspect ratio provision of Section 4.3.3 of
AWC SDPWS-2021.

Figure
R602.10.6.1
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The
poor performance of shear walls in the 1994
Northridge Earthquake was investigated by SEAOSC
and the Los Angeles City Joint Task Force. Box nails
were observed to cause massive and multiple failures
of the typical 3/8" thick 3 ply-plywood during the
Northridge Earthquake. The County of Los Angeles
and cities in this region have taken extra measures to
maintain the structural integrity of the framing of the shear walls when designed for high levels of seismic
loads. The performance of modern day braced wall
panel construction is directly related to an adequate
load path extending from the roof diaphragm to the
foundation system.

Figure
R602.10.6.2
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The
poor performance of such shear walls in the 1994
Northridge Earthquake was investigated by SEAOSC
and the Los Angeles City Joint Task Force. The
County of Los Angeles and cities in this region have
taken extra measures to maintain the structural
Enclosure E 371
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Code
Section
Condition Explanation of Amendment
integrity of the framing of the shear walls when
designed for high levels of seismic loads. Box nails
were observed to cause massive and multiple failures
of typical 3/8-inch thick plywood during the Northridge Earthquake. This change to the minimum lap splice
requirement is consistent with Section 25.5 of ACI
318-19.

Figure
R602.10.6.4
Geological 3/8" thick 3 ply-plywood shear walls experienced many failures during the Northridge Earthquake. The
poor performance of such shear walls in the 1994
Northridge Earthquake was investigated by SEAOSC
and the Los Angeles City Joint Task Force. The
County of Los Angeles and cities in this region have
taken extra measures to maintain the structural
integrity of the framing of the shear walls when
designed for high levels of seismic loads. The
proposal in which "washers shall be a minimum of

0.229 inch by 3 inches by 3 inches in size" is
consistent with Section R602.11.1 of the California
Residential Code and Section 2308.7.1 of the
California Building Code.

R606.4.4 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. The addition of the word "or" will
prevent the use of unreinforced parapets in Seismic
Design Category D0, D1, or D2, or on townhouses in
Seismic Design Category C.

Having vertical reinforcement closer to the ends of
masonry walls helps to improve the seismic
performance of masonry buildings and structures.

R803.2.4 Geological Section R802 of the Code does not provide any prescriptive criteria to limit the maximum size of roof openings, nor does Section R803 provide any details
to address the issue of shear transfer near larger roof openings. With the higher seismic demand placed on
buildings and structures in this region, it is important to ensure that a complete load path is provided to
Enclosure E 372
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Section
Condition Explanation of Amendment
reduce or eliminate potential damage caused by
seismic forces. Requiring blocking with metal ties
around larger roof openings and limiting the size of
openings is consistent with the requirements of
Section R301.2.2.6.

R1001.3.1 Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. The performance of
fireplaces/chimneys without anchorage to the
foundation has been observed to be inadequate
during major earthquakes. The lack of anchorage to
the foundation results in overturn or displacement.

Appendix BJ
BJ106.1
Geological Los Angeles County is prone to seismic activity due to the existence of active faults in the Southern
California area. Due to the limited seismic
performance information on strawbale construction,
this amendment is intended to limit the higher risk
strawbale construction poses in a high seismic
region.

Appendix CJ
CJ101.1,
CJ102.1,
CJ103.1,
CJ103.4,
CJ107.1
Administrative,
Climatic,
Geologic,
Topographical
Adoption of this appendix is necessary because strict
compliance with state and local standards and laws
would prevent, hinder, or delay the mitigation of the
effects of a declared shelter crisis or other
emergency. The modifications to this appendix are
administrative in nature, to provide clarification of
various provisions of the language of this voluntary
Appendix.

CJ106.1 Climatic Los Angeles County is subject to extreme temperatures, and many of these membrane
structures will be erected and occupied during severe
weather events. It is necessary to include this
amendment to ensure the safety, health, and comfort
of the occupants is maintained during extreme heat
and cold.

CJ110.1.1,
CJ110.1.2
Administrative These sections are simply a cross reference to the State Plumbing Code requirement for user
convenience and is not adding a new building
standard nor enacting a more restrictive requirement.

To the extent findings are requested, see prefatory
language in this Section.

CJ110.3 Climatic The County may utilize mobile restroom facilities that are physically separate from the living facilities. Due Enclosure E 373
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Code
Section
Condition Explanation of Amendment
to the potential for severe local weather conditions,
with extreme temperatures or torrential rain, the
distance to the restroom facilities required for the
comfort, safety, and health of displaced people
should be reduced to 300 feet or as determined by
the Building Official.

SECTION 45. This ordinance shall become operative on January 1, 2026. [TITLE30RESDCODE2025CSCC]
Enclosure E 374
HOA.105511798.7

ANALYSIS
This ordinance repeals those provisions of Title 31 – Green Building Standards Code – of the Los Angeles County Code that incorporated by reference portions of the 2022 Edition of the California Green Building Standards Code, and the ordinance replaces them with provisions incorporating by reference portions of the 2025 California Green Building Standards Code, as published by the California Building Standards Commission, with certain changes and modifications.

State law requires that the County adopt ordinances that contain the same requirements as are contained in the building standards published in the most recent edition of the California Green Building Standards Code. State law allows the County to change or modify these requirements in compliance with section 17958 of the California Health and Safety Code.

The changes and modifications to requirements contained in the building standards published in the 2025 California Green Building Standards Code that are contained in this ordinance are based upon express findings, contained in the ordinance, that such changes are reasonably necessary due to local climatic, geological, or topographical conditions. These changes and modifications are substantially equivalent to changes or modifications previously filed with the California Building Standards Commission by the County of Los Angeles, which were in effect as of September 30, 2025.

DAWYN R. HARRISON
County Counsel
By

MARGARET AMBROSE
Senior Deputy County Counsel
Public Works Division
MA/bc
Requested: 8/6/25
Revised: 10/1/25
Enclosure F 375
HOA.105511798.7
ORDINANCE NO. ______________
An ordinance amending Title 31 – Green Building Standards Code – of the Los Angeles County Code by adopting and incorporating by reference the 202225 California Green Building Standards Code with certain changes and modifications, and making other revisions thereto.

The Board of Supervisors of the County of Los Angeles ordains as follows:

SECTION 1. Chapters 2 through 8, and Appendix A4 and Appendix A5, of this Title 31 of the Los Angeles County Code, which incorporate by reference and modify portions of the 201922 California Green Building Standards Code, are hereby repealed.

SECTION 2. Section 100 is hereby amended to read as follows:
100 ADOPTION AND INCORPORATION BY REFERENCE
Except as hereinafter changed or modified, Sections 102 through 119 of Chapter 1 of Title 26 of the Los Angeles County Code are adopted and incorporated by reference into this Title 31 as if fully set forth below, and shall be known as Sections 102 through 119 of Chapter 1 of Title 31 of the Los Angeles County Code.

Except as hereinafter changed or modified, Chapters 2 through 8, and Appendix A4 and Appendix A5, of that certain code known and designated as the 202225 California Green Building Standards Code, as published by the California Building Standards Commission, are adopted and incorporated by reference into this Title 31, as if fully set forth below, and shall be known as Chapters 2 through 8, and Appendix A4 and Appendix A5, of Title 31 of the Los Angeles County Code.

Enclosure F 376
HOA.105511798.7 2
A copy of the 202225 California Green Building Standards Code shall be at all times maintained by the Building Official for use and examination by the public.

SECTION 3. Section 202 is hereby amended to read, in alphabetical order, as follows:
202 DEFINITIONS
. . .

COOL ROOF. A roofing material that reduces heat gain through the roof and has either high thermal emittance and high solar reflectance, or low thermal emittance and exceptionally high solar reflectance, as specified in Title 24, Part 6, of the California Energy Code.

COOL ROOF RATING COUNCIL or CRRC. The entity recognized by the California Energy Commission to rate and certify the reflectance and emittance values of roofing products.
. . .

DEVELOPMENT. Any activity requiring discretionary or non-discretionary land use or construction approval from the County that results in the creation, addition, modification, or replacement of impervious surface area, that is not part of routine maintenance activity. Development includes, but is not limited to, land subdivisions; the construction, installation, addition, or replacement of a building or structure; expansion of a building footprint; and land-disturbing activities related to structural or impervious surfaces. Development shall not include routine maintenance of original lines and grades and/or hydraulic capacity.

Enclosure F 377
HOA.105511798.7 3
. . .

SECTION 4. Section 301 is hereby amended to read as follows:
301 GENERAL
301.1 Scope.

Buildings and structures shall be designed to include the green building measures specified as mandatory in the application checklists contained in this code.

Voluntary green building measures are also included in the application checklists and may be included in the design and construction of structures covered by this code, but are not required unless adopted by a city, county or city and county as specified in Section 101.7indicated in Sections 301.1.1, 301.2, and 301.3. 301.1.1 Additions and alterationsResidential construction. [HCD]
The mandatory provisions of Chapter 4 shall be applied to newly constructed low-rise and high-rise residential buildings and structures six stories or less and additions to or alterations of existing residential buildings where the addition or alteration increases the building's conditioned area, volume or size. The requirements shall apply only to and/or within the specified area of the addition or alteration. . . .

Newly constructed high-rise residential buildings of seven stories or greater shall comply with Section 301.3.
. . .

Enclosure F 378
HOA.105511798.7 4
301.3 Nonresidential additions and alterationsconstruction. [BSC - CG]
. . .
301.3.3 Nonresidential buildings greater than or equal to 25,000 square feet.

In addition to the requirements of Section 301.3, any newly constructed nonresidential building greater than or equal to 25,000 square feet shall comply with all requirements of Section A5.601.2.4 Tier 1. Roofing materials shall comply with Tier 2 requirements of Table A5.106.11.2.3 [BSC].

Exceptions:

1. Compliance with Section A5.601.2.3 shall be voluntary.

2. High-rise residential buildings of seven stories or greater shall comply with Table A4.106.5.1(4) in lieu of Table A5.106.11.2.3.

SECTION 5. Section 4.106.4 is hereby amended to read as follows:
. . .

4.106.4.1 New one- and two-family dwellings and townhouses with attached private garages.

For each dwelling unit, install a listed raceway to accommodateand a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1- inch inside diameter). The raceway shall originate at the main service or subpanel and shall terminate into a listed cabinet, box, or other enclosureattachment plug in close proximity to the proposed location of an EV charger. Raceways are required to be Enclosure F 379
HOA.105511798.7 5
continuous at enclosed, inaccessible or concealed areas and spaces. The service panel and/or subpanel shall provide capacity to install a 40-ampere 208/240-volt minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.

Exception: A raceway is not required if a minimum 40-ampere 208/240-volt dedicated EV branch circuit is installed in close proximity to the proposed location of an EV charger at the time of original construction in accordance with the California Electrical Code.

4.106.4.1.1 Identification.

The service panel or subpanel circuit directory shall identify the overcurrent protective device space(s) reserved for future EV charging as "EV CAPABLE". The raceway termination location shall be permanently and visibly marked as "EV CAPABLE".
. . .

SECTION 6. Section 4.106.5 is hereby added to read as follows:

4.106.5 Low-impact development (LID).

New development or alterations to existing developed sites shall comply with Chapter 12.84 of Title 12 of the Los Angeles County Code.

SECTION 7. Section 4.106.6 is hereby added to read as follows:

4.106.6 Cool roof for reduction of heat island effect.

Roofing materials for conditioned and unconditioned spaces shall comply with the solar reflectance and thermal emittance requirements of this Section.

Enclosure F 380
HOA.105511798.7 6
Exceptions:

1. Roof repair.

2. Roof replacement when the roof area being replaced is equal to or less than fifty (50) percent of the total roof area.

3. Installation of building-integrated photovoltaics.

4. Installation of a steep-sloped roof (roof slope > 2:12) in climate zone 16 on other than a low-rise multifamily building.

5. Additions resulting in less than 500 square feet of added roof area or less than fifty (50) percent of the total roof area, whichever is greater.

6. Roof construction that has a thermal mass over the roof membrane, including areas of vegetated (green) roofs, weighing at least 25 pounds per square foot.

4.106.6.1 Solar reflectance.

Roofing materials shall have a minimum 3-year aged solar reflectance equal to or greater than the values specified in Table 4.106.6(1) and Table 4.106.6(2).

Solar reflectance values shall be based on the aged reflectance value of the roofing product or the equation in Section A4.106.5.1, if the CRRC testing for aged solar reflectance is not available.

4.106.6.2 Thermal emittance.

Roofing materials shall have a CRRC initial or aged thermal emittance equal to or greater than the values specified in Table 4.106.6(1) and Table 4.106.6(2).

Enclosure F 381
HOA.105511798.7 7

4.106.6.3 Solar reflectance index alternative.

Roofing materials having a Solar Reflectance Index (SRI) equal to or greater than the values specified in Table 4.106.6(1) and Table 4.106.6(2) may be used as an alternative to compliance with the 3-year aged solar reflectance and thermal emittance values.

SRI values used to comply with this Section shall be calculated using the SRI Calculation Worksheet (SRI-WS) developed by the California Energy Commission or in compliance with ASTM E1980-01, as specified in the current California Energy Code.

Solar reflectance values used in the SRI-WS shall be based on the aged reflectance value of the roofing product or the equation in Section A4.106.5.1, if the CRRC-certified aged solar reflectance is not available. Certified thermal emittance used in the SRI-WS may be either the initial value or the aged value listed by the CRRC.

Note: The Solar Reflectance Index Calculation Worksheet (SRI-WS) is available by contacting the Energy Standards Hotline at 1-800-772-3300, website at www.energy.ca.gov or by email at [email protected].

SECTION 8. Tables 4.106.6(1) and 4.106.6(2) are hereby added to read as follows:

TABLE 4.106.6(1) – LOW-RISE RESIDENTIAL
ROOF SLOPE MINIMUM 3-YEAR

AGED SOLAR

REFLECTANCE

THERMAL

EMITTANCE
SRI
≤2:12 0.65 0.85 78
>2:12 0.25 0.85 20
Enclosure F 382
HOA.105511798.7 8
TABLE 4.106.6(2) – HIGH RISE RESIDENTIAL BUILDINGS, HOTELS AND MOTELS ROOF SLOPE MINIMUM 3-YEAR

AGED SOLAR

REFLECTANCE

THERMAL

EMITTANCE
SRI
≤2:12 0.65 0.75 78
>2:12 0.25 0.75 20
SECTION 9. Section 4.408 is hereby amended to read as follows:

4.408 CONSTRUCTION WASTE REDUCTION, DISPOSAL AND

RECYCLING

4.408.1 Construction waste management.

Newly-constructed projects and additions and alterations to existing buildings shall Rrecycle and/or salvage for reuse a minimum of sixty-five (65) percent of the nonhazardous construction and demolition wastedebris in accordance with either Section 4.408.2, 4.408.3, or 4.408.4, or meet a more stringent local construction and demolition waste management ordinance, whichever is more stringent. Calculate the amount of materials diverted by weight or by volume, but not by both. . . .

SECTION 10. Section 5.106.3 is hereby added to read as follows:

5.106.3 Low-impact development (LID).

New development or alterations to existing developed sites shall comply with Chapter 12.84 of Title 12 of the Los Angeles County Code.

Enclosure F 383
HOA.105511798.7 9
SECTION 11. Section 5.106.11 is hereby added to read as follows:

5.106.11 Cool roof for reduction of heat island effect.

Roofing materials for conditioned and unconditioned spaces shall comply with the solar reflectance and thermal emittance requirements of this Section.

Exceptions:

1. Roof repair.

2. Roof replacement when the roof area being replaced is equal to or less than fifty (50) percent of the total roof area.

3. Installation of building-integrated photovoltaics.

4. Additions resulting in less than 500 square feet of added roof area or less than fifty (50) percent of the total roof area, whichever is greater.

5. Roof construction that has a thermal mass over the roof membrane, including areas of vegetated (green) roofs, weighing at least 25 pounds per square foot.

5.106.11.1 Solar reflectance.

Roofing materials shall have a minimum 3-year aged solar reflectance equal to or greater than values specified in Table 5.106.11.

Solar reflectance values shall be based on the aged reflectance value of the roofing product or the equation in Section A5.106.11.2.1, if the CRRC testing for aged solar reflectance is not available.

5.106.11.2 Thermal emittance.

Roofing material shall have a CRRC initial or aged thermal emittance equal to or greater than the values specified in Table 5.106.11.

Enclosure F 384
HOA.105511798.7 10

5.106.11.3 Solar reflectance index alternative.

Roofing material having a Solar Reflectance Index (SRI) equal to or greater than the values specified in Table 5.106.11 may be used as an alternative to compliance with the 3-year aged solar reflectance and thermal emittance values.

SRI values used to comply with this Section shall be calculated using the SRI Calculation Worksheet (SRI-WS) developed by the California Energy Commission or in compliance with ASTM E1980-11, as specified in the current California Energy Code.

Solar reflectance values used in the SRI-WS shall be based on the aged reflectance value of the roofing product or the equation in Section A5.106.11.2.1, if the CRRCcertified aged solar reflectance is not available. Certified thermal emittance used in the SRI-WS may be either the initial value or the aged value listed by the CRRC.

SECTION 12. Table 5.106.11 is hereby added to read as follows:

TABLE 5.106.11
ROOF SLOPE MINIMUM 3-YEAR AGED

SOLAR REFLECTANCE

THERMAL

EMITTANCE
SRI
≤2:12 0.68 0.85 82
>2:12 0.28 0.85 27
Enclosure F 385
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SECTION 13. Section 5.408.1 is hereby amended to read as follows:

5.408.1 Construction waste management.

Newly-constructed projects and additions and alterations to existing buildings shall Rrecycle and/or salvage for reuse a minimum of sixty-five (65) percent of the non-hazardous construction and demolition wastedebris in accordance with Section

5.408.1.1, 5.408.1.2, or 5.408.1.3; or meet a local construction and demolition waste management ordinance, whichever is more stringent. Calculate the amount of materials diverted by weight or volume, but not by both.

SECTION 14. Appendix A4 is hereby amended to read as follows:

APPENDIX A4

RESIDENTIAL VOLUNTARY MEASURES
Some of tThe measures contained in this appendix are not mandatory unless adopted by a city, county or city and county as specified in Section 101.7 and provide additional measures thatexcept to the extent indicated elsewhere in this Code. dDesigners, builders, and property owners may wishare encouraged to consider all of these measures during the planning, design, and construction process.

SECTION 15. Section A4.108.1 is hereby amended to read as follows:

A4.108.1 Innovative concepts and local environmental conditions.

The provisions of this cCode are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design, or method of construction not specifically prescribed by this cCode. This code does not limit the Enclosure F 386
HOA.105511798.7 12
authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

SECTION 16. Section A4.306.1 is hereby amended to read as follows:

A4.306.1 Innovative concepts and local environmental conditions.

The provisions of this cCode are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design, or method of construction not specifically prescribed by this cCode. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

SECTION 17. Section A4.411.1 is hereby amended to read as follows:

A4.411.1 Innovative concepts and local environmental conditions.

The provisions of this cCode are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design, or method of construction not specifically prescribed by this cCode. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

SECTION 18. Section A4.509.1 is hereby amended to read as follows:

A4.509.1 Innovative concepts and local environmental conditions.

The provisions of this cCode are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design, or method of construction not specifically prescribed by this cCode. This code does not limit the Enclosure F 387
HOA.105511798.7 13
authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.

SECTION 19. Section A4.601.1 is hereby amended to read as follows:

A4.601.1 Scope.

The measures contained in this appendix are not mandatory unless adopted by a city, county, or city and county as specified in Section 101.7except to the extent indicated elsewhere in this Code. The provisions of this sSection outline means of achieving enhanced construction or reach levels by incorporating additional green building measures. In order to meet one of the tier levels, designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level.

SECTION 20. Section A4.601.2 is hereby amended to read as follows:

A4.601.2 Prerequisite measures.

Tier 1 and Tier 2 thresholds require compliance with the mandatory provisions of this cCode and incorporation of the required prerequisite measures listed in Section A4.601.4.2 for Tier 1 and A4.601.5.2 for Tier 2. Prerequisite measures are also identified in the Residential Occupancies Application Checklist in Section A4.602.

As specified in Section 101.7, additional prerequisite measures may be included by the enforcing agency to address specific local environmental conditions and may be listed in the Innovative Concepts and Local Environmental Conditions portions of the checklist.

Enclosure F 388
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SECTION 21. Section A4.602 is hereby amended to read as follows:

RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST
. . .
1Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.Reserved. . . .

SECTION 22. Section A4.701.1 is hereby amended to read as follows:

A4.701.1 General.

The voluntary measures of this cCode are designed and promulgated to be adopted by reference and made mandatory by local ordinance pursuant to Section 101.7. Jurisdictions wishing to adopt the voluntary provisions of this cCode as an enforceable regulation governing structures and premises should ensure that certain factual information is included in the adopting ordinance and that the measures are appropriate and achievable and are considered to be suitable as mandatory by the city, county, or city and county. The following sample adoption ordinance addresses several key elements of a code adoption ordinance, including the information required for insertion into thesuch code text.
. . .

Enclosure F 389
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SECTION 23. The Appendix A5 heading is hereby amended to read as follows:

APPENDIX A5

NON-RESIDENTIAL VOLUNTARY MEASURES
The measures contained in this appendix are not mandatory unless adopted by a city, county, or city and county as specified in Section 101.7 and provide additional measures thatexcept to the extent indicated elsewhere in this Code. dDesigners, builders and property owners may wishare encouraged to consider all of these measures during the planning, design, and construction process.

SECTION 24. Section A5.601.1 is hereby amended to read as follows:

A5.601.1 Scope.

The measures contained in this appendix are not mandatory unless adopted by local government as specified in Section 101.7except to the extent indicated elsewhere in this Code. The provisions of this sSection outline means of achieving enhanced construction or reach levels by incorporating additional green building measures for newly constructed nonresidential buildings as well as additions and alterations. In order to meet one of the tier levels, designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. Refer to the provisions in Section 301.3 for non-residential additions and alterationsconstruction scope and application.

Malibu City CouncilDecember 8, 2025

Malibu City Council
December 8, 2025