Agenda packet — West Sacramento City Council, April 10, 2024 (part 3 of 6)

F. Contractor shall prepare Record Drawings: Immediately prior to inspection for Certification of Substantial Completion of the Work, review completed marked-up AS-BUILT Record Drawings with District, Project Inspector and Architect to ensure accuracy of information. Once accuracy of information is confirmed, prepare and submit a full electronic set, professionally drafted in AutoCAD format, of as-built Contract Drawings and Shop Drawings.

1. Incorporate changes and additional information previously marked on print sets. Delete, redraw, and/or add details and notations where applicable. Identify and date each Drawing; include the printed designation “AS-BUILT RECORD DRAWING” and the date prepared in a prominent location on each Drawing.

2. Distribution: Whether or not changes and additional information were recorded, organize the original marked-up set of drawings that were maintained during the construction period within BLUEBEAM into manageable sets. The sets should be labeled with all appropriate identification, including titles, dates and other information on cover sheets and submit to District.

PART 2 - PRODUCTS

2.01 GENERAL REQUIREMENTS
A. Shop drawings:

1. Make all drawings to an appropriate scale, large enough to show all pertinent aspects of the item and the method of its connection into the work.

2. Make each drawing sheet in a reproducible form such a tracing, sepia, or Mylar transparency.

B. Grouping: Combine submittals in logical groupings; for example, submit Shop Drawings grouped by Sections of the Specifications, arranged in the specified sequence.

C. Shop Drawings: Four blue or black line prints of each for the Engineer.

D. Content:

1. Shop drawings may be:
a. Drawings or diagrams prepared by the Contractor, a supplier, a manufacturer, or other.
b. Typewritten data or descriptions.
c. Manufacturer’s printed brochures, descriptions, charts, instructions, or data sheets.

E. Timing: Submit all shop drawings prior to installation of any items included in submittal.

2.02 CORROSION PROOFING
A. Corrosion Proofing / U.V. Protection: Products which will be installed outdoors, exposed to the weather, exposed to moisture, or other potentially damaging conditions shall be constructed to resist the effects of such exposure.

B. Exterior casings shall have lapped or gasketed joints effectively sealed to prevent intrusion of moisture or other injurious substances.
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West Sacramento Fire Station 43 230500 - 8 Common Work Results for HVAC C. Casings, ducts, pipes, or product items shall be constructed of materials which are fully resistant to harmful substances they may normally contact, or (if ferrous) shall be galvanized after fabrication, or shall be fully protected from such substances by paint or other coating in appropriate thickness or number of coats.

D. All bolts, nuts, screws, and washers shall be galvanized unless specified to be plated or unprotected.

E. Any exposed plastic pipe must have a U.V. inhibitor.

2.03 MATERIAL AND EQUIPMENT
A. All material and equipment shall be new, of the type, capacity and quality specified and free from defects. All materials and equipment shall be of the same brand or manufacturer throughout for each class of material or equipment wherever possible.

2.04 FILTERS
A. A complete set of filters shall be supplied for use during the construction period. A complete set of new filters shall be installed before testing and balancing.

2.05 ACCESS BOXES
A. For below grade valves and piping devices

1. Christy Concrete Products Company, Brooks, with galvanized steel checker plate recessed traffic lid flush with rim of box. Lids for boxes located in areas subject to vehicular traffic shall be constructed to withstand H20 live loading as defined by the American Association of State Highway Officials (16,000 pound maximum individual wheel load). Service identification shall be conspicuously welded on lid before galvanizing. For gas service, drill twelve 3/8" diameter vent holes through lid before galvanizing. Provide manufacturer's box extensions to bring box bottom three inches below bottom of valve and box top flush with finish grade.

2. Box sizes (non traffic)
Type Valve Valve Size Box No.

Water 2 1/2" and smaller B-9
Water 3" and 4" B-16
Water 5" and 6" B-30
Water 8" 1 B-36
Snow Melt Manifold Size of manifold plus 6" each end
Gas 1 1/2" and smaller B-24
Gas 2" and 2 1/2" B-36
Gas 3" and 4" B-40
Gas 5" and 6" B-48
Gas 8" B-52
Steam 2 1/2" and smaller B-9
Steam 3" and 4" B-16
Steam 5" and 6" B-30

2.06 ACCESS DOORS
A. Unless specified otherwise by the Architect, provide access doors of the following type:

1. Concealed hinges, prime coated with rust-inhibitive paint, style of door to suit wall, ceiling, floor or roof construction and fire rating.
a. Milcor Type M
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West Sacramento Fire Station 43 230500 - 9 Common Work Results for HVAC b. Milcor Type UFR, fire resistive type Underwriters Laboratory Class B, 1-1/2 hour rating meets UBC, IBCO and BOCA codes for two hour rated walls self latching with key lock, Elmdor/Stonman Type FR or equal.

2. Minimum size; 18" by 18".

3. Wall and ceiling access doors: Furnish as required for access to ducts, damper operators, duct mounted access panels, etc.; coordinate size and location to obtain access.

4. See architectural drawings for further requirements.

2.07 MISCELLANEOUS EQUIPMENT AND MATERIALS
A. Furnish and install miscellaneous equipment and materials required for the systems described whether or not specifically shown.

PART 3 - EXECUTION

3.01 PREPARATION
A. General:

1. Do not install any equipment, valve, control, motor, filter, or any other device requiring maintenance or service in an inaccessible location or position. Install access doors as specified herein to render all such equipment serviceable whether specifically shown on the plans or not. Maintain code clearance to all equipment. Coordinate location of doors with lights, etc., and locate symmetrically with same.

B. Observations: Check all project drawings and specifications; report any discrepancies before proceeding with the work and in time to avoid unnecessary rework.

C. Investigation: Examine the areas, conditions, and status of other work contiguous or connecting to the work to be performed; ensure that the time of installation is coordinated with other work.

D. Interruptions of Service: Portions of this work may involve connection to existing work, facilities, or utilities ties and may require interrupting shutdowns of same. Carefully plan, coordinate and execute such work so that any interruptions will be kept to a minimum in time and occurrence.

Submit request for shutdowns and make shutdowns only after receiving written approval from the Owner.

E. Other: Correct any unsatisfactory conditions that may impede proper execution of the work.

Ensure that all arrangements, personnel, materials, and tools are appropriate and adequate before proceeding.

3.02 INSTALLATION
A. General:

1. Material and equipment incorporated in the work shall be used or applied only for the purpose intended or specified.

2. Install piping and ductwork and all equipment that requires access with minimum vertical and horizontal clearances required by OSHA for service.

3. All mechanical systems such as ductwork, pipes and all other equipment shall have 2 inches minimum clearance.

4. Do not proceed with work without clear understanding.

3.03 MANUFACTURER'S INSTRUCTIONS:

A. When specifications require that installation comply with manufacturer's printed instructions, obtain and distribute copies of such instructions to parties involved in the installation.

B. Perform work in accordance with manufacturer's instructions. Do not omit any preparatory step or installation procedure unless specifically modified or exempted by specifications.

C. Handle, install, connect, clean, condition and adjust products in strict accordance with such instructions and in conformity with specified requirements. 386
West Sacramento Fire Station 43 230500 - 10 Common Work Results for HVAC D. Should job conditions or specified requirements conflict with manufacturer's instructions, consult with the Engineer for further instructions.

E. Do not proceed with work without clear understanding.

3.04 DEMOLITION
A. General

1. Procedures shall be determined by the contractor.

2. Demolition work shall not be commenced until all temporary work such as fences, barricades, and any required warning lights and apparatus are furnished and installed and as required by law, regulation, or ordinance, or elsewhere in this specification.

3. Demolition work shall proceed in such a manner as to minimize the spread of dust and flying particles and to provide safe working conditions for personnel.

4. Fires and explosives shall not be permitted.

3.05 PROTECTION
A. Contractor shall conform to all Federal, State, and local ordinances related to the protection of the public and Contractor’s personnel and the flow of traffic/ Provide protection for persons and property throughout the progress of the work.

B. Existing work damaged by the contractor in the execution of this Contract shall be restored to former condition by the contractor to the satisfaction of the Owner without an increase in the Contract Sum and without an extension of the Contract Time.

3.06 DISPOSITION OF MATERIALS
A. All materials and equipment not scheduled to be salvaged, including debris and all rejected salvaged materials, shall become the property of the Contractor and shall be disposed of off site in a legal manner. Location of dump and length of hall shall be the contractor’s responsibility.

3.07 LOCATION OF EQUIPMENT, PIPING AND DUCT WORK
A. Where job conditions do not permit the installation of piping, ductwork, etc. in the location shown, it shall be brought to the engineer's attention immediately before fabrication of ductwork, piping, etc. and the relocation required shall be determined in a joint conference.

B. The contractor will be held responsible for the relocating of any items installed without first obtaining the architect’s or engineer’s approval. Remove and relocate such items at The contractors expense as so directed by the architect or engineer.

C. Where piping or ducting is left exposed within a room, run in vertical or horizontal planes.

Maintain uniform spacing between parallel lines and/or adjacent wall, floor or ceiling surfaces.

D. Horizontal runs of plumbing and/or electrical conduit suspended from ceilings shall provide for maximum clearance.

E. Make minor changes in locations of equipment, piping, ducts, etc. from locations shown including minor offsets when directed by the engineer, at no additional cost to the owner.

3.08 CARE AND CLEANING
A. Clean and adjust all equipment at completion of installation to provide operating conditions satisfactory to the engineer. Remove broken, damaged or defective parts; repair or replace as directed by engineer. Remove surface material and debris resulting from this work when directed.

3.09 FLASHINGS
A. Furnish and install a waterproof flashing for each pipe, duct, or other penetration through roof or wall. Flashings shall be 4 lb. seamless lead flashings Semco 1100 series with counter flashing as detailed, except in metal roofs flashing for pipes through roof shall be furnished by the roofing contractor. Where details are not specifically delineated, submit details for review. 387
West Sacramento Fire Station 43 230500 - 11 Common Work Results for HVAC

3.10 PAINTING
A. Painting is included under the Painting and Finishing Section. It shall be the responsibility of the Mechanical Contractor to properly protect all equipment and controls during painting operations and the Mechanical Contractor shall repair and/or replace any item damaged due to painting that was not properly protected.

3.11 ACCESS DOORS
A. Provide access doors to all concealed equipment, valves, controls, etc. Locate doors where shown or to be coordinated and symmetrically located with lights, diffusers, etc. Access doors furnished by the mechanical contractor shall be installed by the general contractor.

3.12 ELECTRICAL REQUIREMENTS
A. Provide working space around electrical equipment in compliance with the applicable Code and all Safety Orders.

B. Coordinate the Mechanical Work with the Electrical Work to comply with the above. Furnish and set in place all motors and duct or pipe installed controls.

C. Location of all new switches shall be verified with the architect or architect before roughing-in.

Furnish necessary control diagrams and instruction for the proper installation of the controls.

D. Assume responsibility for the proper supervision and testing of the controls for sequence of operation.

E. Motors and control equipment shall conform to the Standards of the National Electrical Manufacturers Association.

F. All equipment electrical characteristics shall be as noted on the drawings, or as specified. Verify before ordering any equipment.

G. Before permitting operation of any equipment which is furnished, installed or modified under this contract, review all wiring connections that pertain to mechanical equipment or work, and verify that these connections are correct.

H. Ascertain that the over-load protection devices installed are of the correct type, rating and setting to properly protect this equipment.

3.13 SNOW AND ICE DIVERTERS
A. See architectural drawings for details. All roof penetrations shall be protected by snow and ice diverters. Coordinate locations of all roof penetrations with diverter locations. Do not relocate penetrations from locations shown without approval.

3.14 INSTRUCTION OF OWNER'S PERSONNEL
A. Prior to final inspection or acceptance, fully instruct Owner's designated operating and maintenance personnel in operation, adjustment and maintenance of products, equipment and systems.

B. Operating and maintenance manual shall constitute the basis of instruction.

1. Review contents of manual with personnel in full detail to explain all aspects of operations and maintenance.

3.15 RECORD DATA
A. Compilation

1. Record and collect information concurrently with construction progress and date all entries; make drawing entries within 24 hours after occurrence of change or installation requiring recording. Any concealed work covered before recording data shall be uncovered as directed or as necessary to obtain data.

2. Record information on drawing prints using an erasable colored pencil (not ink or indelible pencil); describe clearly by note or graphic line as appropriate. 388
West Sacramento Fire Station 43 230500 - 12 Common Work Results for HVAC B. Locate any concealed work adequately to allow future access with reasonable ease and accuracy.

1. Identify the plan location of all stub outs, pipe lines, etc., which are buried or concealed in the structure, whether installed where shown on the contract drawings or in a different location; show actual field dimensions from column lines, wall lines, or other permanent reference lines or points.

2. In many cases on the contract drawings, the arrangement of conduits, pipes, ducts, and similar items is shown schematically rather than as a precise scaled layout. Identify the actual location of these with horizontal and vertical dimensions. If such lines are exposed or readily accessible, omit dimensional identification.

3. When any work is installed of size, dimension, slope, or location different from that shown on the contract drawings, note the deviation on the Project Record set. If the variations are substantial or cannot be shown clearly on the record drawings, make a new drawing and attach to the Record set.

C. On other documents

1. Where changes occur in specifications, clearly indicate same in ink, colored pencil, or rubber stamp.

2. Where installed equipment differs from that specified (e.g., by accepted substitution or change order) note in the specifications and include complete data on same.

3.16 PROJECT CONSTRUCTION REVIEW
A. A representative of Peters Engineering shall be notified by the contractor at the following stages of construction before covering or enclosing work:

1. Completion of all work above ceilings, before ceiling tiles are installed

2. Completion of all work

3. Completion of corrected items
B. The contractor shall give such notice 48 hours prior to completion of the particular phase. The purpose of notification is so that the required review can be made without delaying construction.

When notified, Peters Engineering will advise the contractor if a field review of the construction will be made in 48 hours or that a review will not be required. If the contractor fails to notify Peters Engineering as required, and/or covers or closes in any construction before required reviews, he may be required to uncover the work for observation.

END OF SECTION
389
West Sacramento Fire Station 43 230530 - 1 Hangers and Supports for HVAC Ductwork SECTION 230530

HANGERS AND SUPPORTS FOR HVAC DUCTWORK
PART 1 - GENERAL

1.01 RELATED DOCUMENTS
A. The requirements of the GENERAL CONDITIONS, SUPPLEMENTARY CONDITIONS, and DIVISION 1, GENERAL REQUIREMENTS, apply to the work in this section.

1.02 SECTIONS INCLUDE
A. General: Refer to Section 230500, Mechanical - General.

B. Work Included: Provide all ductwork and ductwork accessories, auxiliaries, and adjuncts for all and systems as specified or shown.

C. Work Described Elsewhere: HVAC piping, equipment, and controls are specified in other HVAC Sections.

1.03 RELATED SECTIONS
A. All Sections of Division 23.

1.04 SUBMITTALS
A. Air Balancing: Provide submittals for air balancing work as specified in Section 230593 HVAC General.

PART 2 - PRODUCTS

2.01 GENERAL
A. The contractor shall provide all miscellaneous metal to bridge between structural beams to provide connection for duct supports. As an alternate ductwork may be supported from the roof deck if approved by the owner and structural engineer.

B. Rectangular Ducts (Horizontal):

1. Up to 30" duct width: Two 1-1/2" wide 16-gauge galvanized steel straps bolted to opposite sides of duct and firmly secured to overhead construction. Each strap must also be turned and screwed to bottom of duct.

2. 30" and greater duct width: Trapeze assembly comprised of Unistrut, Powerstrut, channel supported at each end by rod firmly secured to overhead construction; affix duct to channel with angle bracket on each side. Each strap must also be turned and screwed to bottom of duct.
a. 30" to 72" duct width: Use Unistrut P-1000 channel or equal, size as necessary, 3/8" diameter rods.
b. 72" to 84" duct width: Use Unistrut P-1000 channel or equal, size as necessary,1/2" diameter rods.
c. 84" and greater duct width: Use Unistrut P-1001 channel or equal, 1/2" diameter rods.

C. Round Ducts (Horizontal):

1. Up to 40” in diameter: Two (2) 1-1/2” wide 18 gauge galvanized steel straps, firmly secured to overhead construction and extending around the entire perimeter of the duct and secured to the duct. Provide bracing to prevent duct sway as specified above for rectangular duct.

2. Ducts over 40” in diameter: All supports for round ductwork over 40” must be approved by the structural engineer.

D. Vertical Ducts:

1. Rectangular: Unistrut, Powerstrut, P-1000 channel riveted or bolted to side of duct and secured to the structure at each floor or other such level. 390
West Sacramento Fire Station 43 230530 - 2 Hangers and Supports for HVAC Ductwork

2. Round: Fabricate two-piece angle iron collar, rivet or bolt to duct, secured to structure per above.

E. Kitchen Exhaust Ducts:

1. Duct bracing and supports shall be of non-combustible material securely attached to the structure and designed to carry gravity and lateral loads.

2. Bolts, screws, and other mechanical fasteners shall not penetrate duct walls.

F. Structure Attachments: See Contract Documents & Specification Section 23 05 48.

PART 3 - EXECUTION

3.01 DUCTWORK SUPPORTS
A. Supports

1. Install ductwork in accordance with applicable details, SMACNA "Guidelines for Seismic Restraints of Mechanical Systems, 1991 ed." recommendations, manufacturer's recommendations, and best practice, coordinate all ductwork support connection with the Structural Engineer.

2. Install ducts rigidly, securely, and air tight.

3. Support ducts independently of ductwork - connected equipment and visa-versa.

4. Ducts shall be vibration isolated as described in 23 05 48.

5. Penetrations:
a. Description: All penetrations of walls separating shall have a minimum clearance of 1/2-inch and a maximum clearance of 3/4 inch.
b. Materials: A minimum 1.5 lbs/cu.ft. fiberglass insulations shall be used and a nonhardening caulking compound.
c. Installation: The opening around the penetration shall be filled loosely with the fiberglass insulation. The opening is then to be sealed airtight with the nonhardening caulking compound. Pipes, ducts, etc., shall be supported on either side of the wall with supports to roof structure.

END OF SECTION
391
West Sacramento Fire Station 43 230553 - 1 Identification for HVAC Piping and Equipment
SECTION 230553

IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT
PART 1 - GENERAL

1.01 SEE SECTION 230500
PART 2 - PRODUCTS

2.01 IDENTIFICATION
A. Equipment: Black Phenolic Plates engraved with 1/2" high white letters. The equipment shall be identified by the mechanical equipment schedule tag numbers shown on the plans (ie. AC-1, REF-1, ACCU-1). Coordinate identification numbers with electrical contractor to ensure that the disconnect switches and other electrical/mechanical equipment has consistent identification numbers.

B. Controls: Same as equipment above except 1/2" high letters.

2.02 PIPE IDENTIFICATION
A. Maximum spacing for identification shall be 10 feet.

B. Identification shall be provided per the following

1. At both sides of floor or wall penetrations

2. Adjacent to all valves and flanges

3. Adjacent to all changes in direction

4. To be visible from the point of normal approach
C. Indicate flow direction and type of fluid.

D. Provide plastic labels for mechanical engraving with predrilled holes for attachment hardware.

1. Material: rigid plastic laminated impact acrylic, 2-layer, exterior grade, UV stable.

2. Thickness: 3/16 inch minimum.

3. Maximum label size: Length and width vary for required label content but, no less than 2 inches wide by 1 inch high.

4. Background color:

5. Normal power: Black, matte finish.

6. Lettering: White, machine engraved, Futura font, 3/8 inch high, all caps.

7. Maximum temperature: Able to withstand up to 160 degrees Fahrenheit.

8. Fasteners: Self-tapping stainless-steel screws, except contact type permanent adhesive where screws cannot or should not penetrate substrate.
a. Mounting screw type to be number 8 – 18 by ½ drilling or tapping style, ¼ inch hex washer head, stainless steel, or similar, appropriate for material in which sign is affixed to. A bead of silicone sealer shall be applied on back of sign and at screw locations prior to affixing sign to equipment.
b. For signs larger than 3 inches by 3 inches, use a minimum of 4 mounting screws.

2.03 PAINTED IDENTIFICATION MATERIALS
A. Stencils: Standard fiberboard stencils, prepared for required applications with the letter sizes generally complying with recommendations of ANSI A13.1 for piping and similar applications but, not less than ¾ inch high letters for access door signs and similar operational instructions.

B. Stencil paint: Standard exterior type stenciling enamel; black, except as otherwise indicated; either brushing grade or pressurized spray can form and grade.

C. Identification paint: Standard identification enamel of colors indicated or, if not otherwise indicated for piping systems, comply with ANSI A13.1 for colors. 392
West Sacramento Fire Station 43 230553 - 2 Identification for HVAC Piping and Equipment

2.04 PIPE IDENTIFICATION
A. General requirements for Manufactured Pipe labels: Preprinted, color-coded, with lettering indicating service, and showing flow direction.

B. Self-adhesive Pipe Labels: Printed plastic with contact-type, permanent-adhesive backing.

Brady/Seton, Stranco, Rowmark or equal.

C. Small pipes: For external diameters less than 6 inches, provide full-band pipe markers, extending 360 degrees around the pipe at each location, fastened by one of the following methods:

1. Snap-on application of pre-tensioned semi-rigid plastic pipe marker.

2. Adhesive lap joint in pipe marker overlap.

3. Laminated or bonded application of pipe marker to pipe (or insulation).

4. Taped to pipe (or insulation) with color-coded plastic adhesive tape, not less than 3/4 inch wide; full circle at both ends of pipe marker, tape lapped 1-1/2 inches.

5. Pipe label contents: Include identification of piping service using piping system nomenclature as specified, schedules or shown, and abbreviate only as necessary for each application. Include pipe size and an arrow indicating direction of flow.

6. Flow-Direction Arrows: Integral with piping system service lettering to accommodate both directions or as separate unit on each pipe label to indicate flow direction.

7. Lettering Size: At least 1-1/2 inches high.

D. Locate pipe markers as follows:

1. Within one foot of each valve, fitting, thermometer or gauge.

2. At each branch or riser take off.

3. At each passage through walls or ceiling construction.

4. At each passage to underground.

5. On all horizontal pipe runs every 20 feet, at least twice in each room.

6. Identify piping contents, flow direction, supply and return.

7. At wall and ceiling access panels.

8. Practible variations or changes in locations and spacing may be made with specific approval of the University’s Representive to meet specific conditions.

A. Color code shall be as follows:

1. Chilled Water Return – Green Background with White Lettering

2. Chilled Water Supply - Green Background with White Lettering

3. Condenser Water Return - Green Background with White Lettering

4. Condenser Water Supply - Green Background with White Lettering

5. Heating Hot Water – Yellow Background with Black Lettering

6. Heating Hot Water – Yellow Background with Black Lettering

7. Natural Gas - Yellow Background with Black Lettering

8. Steam Supply - Yellow Background with Black Lettering

9. Steam Condensate Return - Yellow Background with Black Lettering

10. Refrigerant Piping - Yellow Background with Black Lettering 393
West Sacramento Fire Station 43 230553 - 3 Identification for HVAC Piping and Equipment
B. Pipe Letter height shall be as follows:

Outside Pipe Diameter
Including Insulation
Minimum Length of Label Minimum Height of Letters
.75” – 1.25” 8” .5”

1.5” – 2” 8” .75”

2.5” – 6” 12” 1.25”
8” – 10” 24” 2.5”
Over 10” 32” 3.5”
PART 3 - EXECUTION

3.01 EQUIPMENT AND CONTROL IDENTIFICATION
A. Identify all equipment with permanently attached plates.

B. Identify all controls and controllers except thermostats in finished areas.

3.02 IDENTIFICATION APPLICATIONS
A. Piping and Valves

1. Provide identifications for all valves. Provide tags with lettered inscriptions (not numbered).

END OF SECTION
394
West Sacramento Fire Station 43 230593 - 1 Testing, Adjusting, and Balancing SECTION 230593

TESTING, ADJUSTING, AND BALANCING
PART 1 - GENERAL

1.01 SEE SECTION 230500
A. Work Included: This Section describes balancing requirements for all phases of HVAC work.

The work includes complete balancing, adjusting and testing of the air and hydronic equipment and systems.

1.02 QUALITY ASSURANCE
A. Testing and Balancing shall be performed in complete accordance with AABC National Standards for Field Measurement and Instrumentation only by an AABC or NEBB licensed contractor.

B. Work shall be performed by an independent test and balance agency that specializes in, and whose business is limited to testing and balancing of air conditioning systems.

C. Instruments used for testing and balancing of systems shall have been calibrated within a period of six (6) months and shall be checked for accuracy prior to start of work.

1.03 SUBMITTALS
A. Provide to the Owner and Contractor with four (4) copies of a balancing agenda prior to start of balancing work including:

1. General description of each air system with its associate equipment and operational cycles for winter heating, reheat, humidification, and cooling. Where different cycles are used for day and night time operation, describe separately.

2. A complete list of all flow and terminal measurements to be performed.

3. Agenda shall also include specific procedures for determining test parameters for flow.

Specify type of instruments to be used, method of instrument application and air terminal correction factors for:
a. Air terminal configuration.
b. Flow direction (supply, return, or exhaust).
c. Effective area application to each size and type of air terminal. d. Density corrections.

4. Furnish a copy of agenda to the engineer and Owner prior to start of work, including qualifications of key personnel assigned to the project.

B. Provide a PDF of final report, containing information outlined in AABC and in Part 3 - EXECUTION.

1.04 NOTIFICATION AND SCHEDULING
A. A pre-balance conference shall be held prior to start as scheduled by the Contractor. Attendees at the meeting shall include representatives of the Balancing Contractor, General Contractor, Mechanical Sub-contractor, Control Sub-contractor, and Owner.

B. The schedule for testing and balancing the HVAC system shall be established in coordination with the Balancing Contractor on a critical path network.

C. The Balancing Contractor is responsible for initiating this continuing coordination to determine schedule for final testing and balancing services.

1.05 COORDINATION WITH OTHER TRADES
A. To bring the HVAC system into a state of readiness for testing, adjusting and balancing, the Mechanical Contractor shall perform the following:

1. Ensure that all splitters, extractor, volume, smoke and fire dampers are properly located and functional. Dampers serving requirements of smoke, minimum and maximum 395
West Sacramento Fire Station 43 230593 - 2 Testing, Adjusting, and Balancing outside, return, relief, and exhaust air shall provide tight closure and full opening, with a smooth and free operation.

2. Verify that all supply, return, exhaust, and grilles, registers, diffusers and terminal units are installed and operational.

3. Ensure that air handling or conditioning systems, units, and associated apparatus, such as heating and cooling coils, filter sections, access doors, etc., are blanked and/or sealed to eliminate excessive bypass or leakage of air. All fans and systems (supply, return, relief, and exhaust) are operating and free of vibration.

1.06 BALANCING PROCEDURE FOR VARIABLE AIR VOLUME SYSTEMS A. Compensating for Diversity: When the total airflow of all terminal units is more than the indicated airflow of the fan, place a selected number of terminal units at minimum set-point airflow with the remainder at maximum-airflow condition until the total airflow of the terminal units equals the indicated airflow of the fan. Select the reduced-airflow terminal units so they are distributed evenly among the branch ducts.

PART 2 - PRODUCTS

2.01 INSTRUMENT AND TOOLS
A. Furnish all instrumentation and tools required to perform a complete air and water balance of all systems on this project.

2.02 FLOW METERING SYSTEM
A. Use flow metering systems specified and/or furnished to perform air and water balance.

PART 3 - EXECUTION

3.01 GENERAL
A. Coordinate required locations of duct test openings and damper locations specified in other sections.

B. Coordinate work done by testing and balancing agency with work of other trades.

C. Plan Check and Review:

1. Review location and type of volume dampers inlet conditions to air terminals, valves and HVAC equipment.

2. Review location, type and size of balancing valve, flow metering stations and automatic control valves in the water flow system.

3. Review location of pressure sensors in the air and water distribution systems.

4. Review automatic control systems as they affect the test and balance procedure.

5. Review sheet metal and piping shop drawings to verify the installation of flow control devices.

D. Job Site Inspections

1. Check for necessary balancing hardware (dampers, flow meters, valves, pressure taps, thermometer wells, etc.) to determine if they are installed properly and readily accessible.

2. Identify and report possible restrictions in systems (closed smoke/fire dampers, fire dampers, long runs of flexible duct, poorly installed duct fittings.

3. The mechanical contractor shall make any changes in pulley, sheaves; supply new pulleys, sheaves, belts as required. In addition, the Mechanical Contractor to add dampers, etc. Necessary for correct balance at no additional cost to the Owner.

4. Check for necessary balancing hardware (dampers, flow meters, valves, pressure taps, thermometer wells, etc.) to determine if they are installed properly and readily accessible.

E. Identify and report possible restrictions in systems (closed smoke/fire dampers, fire dampers, long runs of flexible duct, poorly installed duct fittings. 396
West Sacramento Fire Station 43 230593 - 3 Testing, Adjusting, and Balancing

3.02 TESTING
A. Testing equipment shall be furnished by the contractor; testing personnel shall be competent to conduct the tests.

B. Test all ductwork for excessive leakage and/or noise. Testing on any completed section of the ductwork must be made before installation of the finished ceiling or before the ductwork is furred in inaccessible spaces. Any leaks found must be properly repaired or joints remade and the section retested until tight. Any leaks which cause an objectionable noise must be repaired, regardless of the amount of leakage.

C. Should any piece of an apparatus or any material or work fail in any of the tests, it shall be immediately removed and replaced by new material, and portion of the work replaced shall again be tested by Contractor at his own expense.

3.03 OPERATIONAL TESTS AND ADJUSTMENTS
A. Upon completion of the work, all equipment and systems shall be operated and tested for a period of at least three consecutive days to demonstrate their satisfactory overall operation. On the last day of this period, the Contractors shall arrange for an acceptance test and final inspection by the Owner. All necessary adjustments and corrections to the systems shall be made prior to acceptance test so that the systems are operating smoothly and properly and absolutely ready before check and acceptance.

B. Coordination of all items associated with the mechanical systems is the responsibility of the mechanical contractor, including all wiring in connection with mechanical equipment, and all temperature control work. It shall be this contractor's responsibility to determine that his systems, equipment and apparatus are properly wired and controlled and completely ready for satisfactory operation and test.

C. Immediately before starting tests, all air filters shall be replaced as hereinbefore specified. All motors checked for rotation and all bearings lubricated.

D. Operating and safety controls shall be tested at least three times, under ambient design conditions.

3.04 AIR BALANCE
A. Changes, additions and modifications to dampers, pulleys and/or drive belts and other equipment necessary for proper air balance shall be provided by the Mechanical Contractor at no additional cost to the Owner.

B. The Mechanical Contractor shall retain the services of an independent certified test and balance agency to provide a complete air balance. All work shall be done by using instruments certified accurate to limits used in standard practice for testing and balancing of air distribution for heating-cooling systems.

C. Study design specifications and engineering drawings and prepare schedule to physically inspect mechanical equipment for air distribution systems to be tested and balanced.

D. Prepare test and balancing schedule, test record forms and necessary technical information about the air distribution systems for installed heating-cooling equipment, and fan systems, for complete total air balance.

E. Recommend adjustments and/or corrections to mechanical equipment and air distribution systems that are necessary for proper balancing of air handling systems.

F. Upon completion of the air handling system, the Air Balance Agency shall complete tests, analysis and balance of the air handling systems for heating-cooling equipment. The Air-Balance Agency then shall submit four copies of balance report to the Mechanical Contractor for forwarding to the Architect for evaluation and approval.

G. Air Balance Report shall include the following data

1. Design specifications of air handling equipment
a. CFM
397
West Sacramento Fire Station 43 230593 - 4 Testing, Adjusting, and Balancing b. Static Pressure
c. % of Outside Air
d. Fan Motor HP
e. Fan Motor BHP
f. Fan RPM

2. Installed equipment data
a. Manufacturer
b. Identifying Data

3. Balancing test data
a. Fan Speed
b. Fan Operating amperes
c. Fan Operating BHP
d. Fan Duct sizes
e. Air Velocity (avg.)
f. Total CFM
g. Static Pressures
h. Design Specifications of grilles and/or diffusers
i. Manufacturer No. and Data
j. FPM
k. CFM

4. Installed equipment data
a. Manufacturer No. and Data
b. Location

5. Balancing test data
a. FPM
b. CFM
H. All outlets shall be set for the air pattern shown on plans.

I. Supply and return air dampers shall be set for design CFM, on heating and cooling cycle.

J. Test and balance shall correct for air density at 6000 ft. elevation and above.

3.05 WATER BALANCE
A. Hydronic System Balancing

1. Calibration and testing of Hydronic system in conformance with AABC recommendations.

2. Complete air balance prior to Hydronic system balancing.

B. Automatic control valve shall be set for full flow conditions during balancing procedures.

1. Set pumps to design GPM quantities.

2. Upon completion of flow ratings and coil adjustments, mark all settings and record all data.

3. Recorded data shall include:
a. Inlet and leaving temperatures at all coils and heating and cooling equipment. b. Pressure drop at each coil including coil bypass.
398
West Sacramento Fire Station 43 230593 - 5 Testing, Adjusting, and Balancing c. Pump operating suction and discharge pressure and final total dynamic pump head.
d. Rated and actual running amperage of pump motors.

4. Venturies and calibrated orifices with portable or permanent flow meters shall be used to balance the water flows. When above equipment is not installed, obtain water flow balance by measurements of temperature differential across the various coils or elements.

5. Automatic control valve shall be set for full flow conditions during balancing procedures.

C. Motor and Starters

1. Measure the ampere reading of each motor input after final adjustments have been made. Measure the ampere reading of each electrical heater input after final adjustments have been made.

2. Tabulate magnetic starters size, type and manufacturer with heater strip size and type for starters not in motor control centers.

3.06 OWNERS INSTRUCTION
A. Review the installation of all equipment and controls with the Owner after all systems are operating automatically. Instruct the Owner in the adjustment of all control and equipment devices. Allow a minimum of 8 hours for this instruction.

END OF SECTION
399
West Sacramento Fire Station 43 230713 - 1 Duct Insulation SECTION 230713

DUCT INSULATION
PART 1 - GENERAL

1.01 GENERAL REQUIREMENTS
A. See Section 230700
B. A continuous, intact vapor barrier is critical for ducts.

C. All insulation material shall have a mold, humidity, and erosion resistant face that has met the requirements of CMC Table 1701.

D. Insulation applied to the exterior surface of ducts located in buildings shall have a flame spread of no more than 25 and a smoke developed rating of not more than 50.

E. Insulate all above grade ductwork unless otherwise shown on the drawings or specified in Section 23 31 16 METAL DUCT.

PART 2 - PRODUCTS

2.01 ID-1 FLEXIBLE BLANKET/VAPOR BARRIER FACED:

A. Glass fiber reinforced Kraft/aluminum foil faced flexible blanket of 1.5 PCF nominal density resin bonded fibrous glass, have a installed thermal conductivity k factor of 0.25 at 75° F.; suitable for direct application and service on cold and dual temperature ductwork.

B. Supply FSK jacket with a permeance of 0.02 or less
C. Fiberglass insulation with all service facing, Certainteed Type 150 with Type IV facing, Johns Manville Microlite with FSK facing.

2.02 ID-2 FLEXIBLE BLANKET /FIRE WRAP:

A. Fire resistive duct wrap. FireMaster Duct Wrap, 1 ½” thick, 24” or 48” wide x 300” long rolls, foil encapsulated with logo identification. FireMaster Duct Wrap Collar, 8” wide for air duct butt joint optional wrap method.

B. Tapes:

1. High performance filament: Tape No. 898,1” wide, manufactured by 3M Company, St.

Paul, MN or equal and approved.

2. Aluminum foil tape: minimum 3” wide to seal cut blanket edges.

C. Banding Material:

1. Use 304 stainless steel banding for 2-hour ratings ¾” wide x0.015” thick minimum.

D. Insulation Pins/Washers

1. Pins: 10 gage, 4 to 5 inches long, copper coated steel; washers: 1 ½" x 1 ½"” or 1 ½" diameter, galvanized steel speed clip.

E. Through-Penetration Fire Stop Materials

1. Packing Material: Scrap pieces, FireMaster Duct Wrap, 1 ½” thick or 3 PCF mineral wool as packing material.

2. 3M FB-2000+ Silicone sealant.

F. Manufacturer: Fire resistive FireMaster Duct Wrap materials; manufactured by Thermal Ceramics, Augusta Georgia 30903, distributed by 3M, St. Paul, MN and it's authorized distributors, no equal.

PART 3 - EXECUTION

3.01 APPLICATIONS
A. Supply Air Ducts indoors/concealed

1. Use System ID-1 (Flexible Blanket / Vapor Barrier Faced 400
West Sacramento Fire Station 43 230713 - 2 Duct Insulation a. 2” thickness for all sizes; installed R-value = 6.3 minimum b. Applies to all cross sections (I.E. rectangular, circular, etc.) B. Supply/Return Air Ducts Outdoors (See Duct Liner Specification)

1. 2” thickness for all sizes; See Duct Liner for R-value.

2. Applies to all cross sections (I.E. rectangular, circular, etc.) C. Return Air Ducts indoors/concealed

1. Use System ID-1 (Flexible Blanket / Vapor Barrier Faced a. 1 ½" thickness for all sizes; installed R-value = 4.7 minimum. b. Applies to all cross sections (I.E. rectangular, circular, etc.) D. Kitchen Hood Exhaust Ductwork (indoors)

1. Use System ID-2 (Fire Wrap Blanket):
a. Use 3” thickness for all sizes
b. Follow manufacturers recommendations for 2-hour rating.

E. Do not externally insulate the following unless otherwise shown on the drawings or specified:

1. Lined ductwork (indoors).

2. Ducts constructed of fibrous glass (flexible or rigid).**** BE CAREFUL OF LOW TEMPERATURE OSA CONDITIONS IF NOT INSULATING VENTILATION AIR ***

3. Above grade ducts conducting exhaust air or ventilating air (not heated or cooled and used for fresh air supply) unless otherwise noted.

4. Exposed ducts located in conditioned space.

3.02 INSTALLATION FLEXIBLE BLANKET/VAPOR BARRIER FACED
A. Install on supply and return ductwork so that condensation will not occur.

B. Wrap around ducts, butt all joints. Secure with 3” (minimum) width tape at 18" (maximum) intervals along the duct; tape may be of the same material as the insulation facing with a pressure sensitive adhesive on one side or may be Hardcast DT490-C mineral impregnated woven synthetic fiber using Hardcast FTA-20 roller. In addition, on rectangular and cross section ducts, secure to the flat bottoms more than 18" wide with SticKlip fasteners only with 1 ½" diameter washers at 16" centers both ways; one centered longitudinal row is sufficient for ducts up to 36" flat bottom width.

C. Seal all seams and joints with 3" (minimum) width tape centered along the edge of the lap;tape shall be as specified above.

D. Seal all fastener penetrations with 3" x 3" (minimum) tape centered over the washer; tape shall be as specified above.

E. Where strap type duct supports penetrate the insulation, slit the insulation and facing, fit around the straps, and seal with tape as specified above; tape shall be of size to suit the situation and be applied in the number of layers necessary to obtain complete sealing.

F. At trapeze or similar type duct supports, insert a 12" wide strip of Armaflex insulation, ½" thick between duct bottom and the supporting member across and 6" beyond both ends of the bearing surface. Lap ducts insulation over this insert and seal the same as other lapped seams.

G. Insulate all flexible duct connectors to the same thickness as adjacent duct insulation.

H. Continue insulation on terminal unit inlets to cover the entire inlet collar.

I. Insulate over all duct access doors with the same thickness as adjacent duct insulation. Provide removable insulation piece with an outer label on the insulation identifying the type of door.

J. Outdoors, provide additional seal over all joints and fastener or other penetrations by covering same 2" beyond tape sealing (above) with two (2) coats of Fosters 30-65 or Childers CP-34 401
West Sacramento Fire Station 43 230713 - 3 Duct Insulation vapor barrier coating reinforced with Fosters Mast a Fab or Childers Chil Glas #10 reinforced mesh. Vapor barrier coating shall have a permeance of 0.03 perms or lass at 45 mils as tested by ASTM E96, procedure A.

K. Finish all outdoor ductwork insulation by applying two (2) 1/8" thick coats of Foster 46-50 or Childers CP-10/11 weather barrier mastic reinforced with Fosters Mast a Fab or Childers Chil Glas #10 reinforced mesh. Vapor barrier coating shall have a permeance of 0.03 perms or lass at 45 mils as tested by ASTM E96, procedure A. Lap all joints 2".

L. All ductwork shall be wrapped with 1" rigid insulation board and two layers of 5/8" gypsum board taped and sealed as detailed on the drawings from supply and return fans for all air conditioning units.

3.03 INSTALLATION: FLEXIBLE BLANKET/COATED LINER:

A. Apply a 1/16" thick coat of Foster 85-62 JacTac 3-M Company Scotch Grip #38, Childers-125-1, adhesive or duct butter on all end or edges of cuts, rips, etc., before or while installing.

B. Secure to the ductwork with welded or SticKlip, fasteners with 1 ½" diameter washers with cupped or beveled heads. Set at 16 (maximum) on centers both ways; provide a row of pins within 1" of all edges and joints, and one row of pins (minimum) on each flat duct or plenum face. In addition secure the entire perimeter of all edges at seams or joints with a 4" minimum width application of the above specified adhesive. The upstream edge of all duct liner shall have a sheet metal closure to protect against erosion.

C. Fasteners shall compress the liner no more than 1/8”.

D. Clip off protruding ends of fastener pins in plenums.

E. In walk-in plenums, finish the interior face of liner with two (2) coats of Foster 30-36 Sealfas or Childers CP-50AMV1 lagging adhesive. All seams in insulation shall be sealed with fiberglass mesh embedded between coats of lagging adhesive.

3.04 INSTALLATION: FLEXIBLE BLANKET /FIRE WRAP:

A. PREPARATION: Remove dirt and dust, and clean surfaces of openings and items penetrating rated floors and rated walls.

B. Install FireMaster Duct Wrap in direct contact with the duct it encloses. Protect every portion of duct with no less than 2 layers for grease duct applications and 1 layer for 1 hr air duct enclosures and 2 layers of 2 hr air duct enclosures. Overlap both perimeter and longitudinal joints a minimum of 3” per layer of material.

C. Air Duct Enclosure Optional Wrap: Follow same traditional wrap method with exception of utilizing a 3” perimeter overlap in conjunction with longitudinal butt joint wrap plus FireMaster Duct Wrap Collar over exterior layer joints. Filament tape is used as a temporary hold on both layers until binding hardware is in place. Band exterior layer spaced a minimum of 10 ½” on center. For duct widths greater than 24”, weld insulation pins to bottom horizontal and outer vertical duct runs. Impale FireMaster Duct Wrap over pins and secure with galvanized steel speed clips until banding is applied.

D. Protect floor and wall penetrations with an approved through-penetration system having an F and T hourly rating not less than that of the assembly penetrated and installed in accordance with manufacturer’s instructions and as follows:

E. Air Ducts: 1 Hour Enclosure
Option A
Layer FireMaster Duct Wrap per manufacturer’s installation instructions, maintaining a 3” transverse and longitudinal overlaps or optional 3” perimeter overlap with longitudinal butt joints plus FireMaster Duct Wrap Collar over exterior layer joints.

Option B
402
West Sacramento Fire Station 43 230713 - 4 Duct Insulation Tightly butt FireMaster Duct Wrap to the floor or wall on both sides of the assembly. Fill remaining annular space between the wrapped duct (Option A) or bare steel duct (Option B) and periphery of the opening with 4 ¼”, 3 PCF mineral wool batt firmly packed into opening.

Apply ¼” minimum 2000+ Silicone over packing material within the annulus, flush with top surface of floor or both surfaces of wall.

F. Air Ducts: 2 Hour Enclosure - Same as 1 hour air duct enclosure system except apply 2 layers of FireMaster Duct Wrap per manufacturer’s installation instructions.

G. Repair Procedure:

1. Repair damaged FireMaster Duct Wrap in accordance with manufacturer’s instructions.

2. Remove damaged section. Apply new section of same dimension. Place and fit ensuring same overlap that existed previously. Place banding around new FireMaster Duct Wrap material and tension to sufficiently hold in place.

3. If damage has penetrated to interior layer, remove affected sections and reinstall

3.05 INSTALLATION: FIBERGLASS DUCT BOARD / VAPOR BARRIER:

A. Board shall be secured to the ductwork with mechanical fasteners within 3” of edges of board, 12” on center.

B. All joints shall be closed with a vapor barrier mastic reinforced with 3” glass scrim tape. For outdoor systems, the standard facing shall be over-coated with a suitable weather barrier mastic reinforced fabric.

C. Corner angles shall be installed on all external corners of rigid duct insulation.

END OF SECTION
403
West Sacramento Fire Station 43 233113 - 1 Metal Ducts
SECTION 233113

METAL DUCTS
PART 1 - GENERAL

1.01 RELATED DOCUMENTS
A. The requirements of the GENERAL CONDITIONS, SUPPLEMENTARY CONDITIONS, and DIVISION 1, GENERAL REQUIREMENTS, apply the work in this section.

1.02 SECTION INCLUDES
A. General: Refer to Section 23 05 00, Mechanical - General.

B. Work Included: Provide all ductwork and ductwork accessories, auxiliaries, and adjuncts for all and systems as specified or shown.

C. Work Described Elsewhere: HVAC piping, equipment, and controls are specified in other HVAC Sections.

PART 2 - PRODUCTS

2.01 DUCT WORK
A. Requirements

1. Shop Fabricated Ductwork
a. Fabricate ductwork as required by classification as described below or gauges, and of configuration and sizes shown on the Drawings. Note that duct sizes shown are net inside; where ducts are lined, fabricate larger than shown to accommodate lining with shown dimensions net inside lining. b. Fabricate ducts and fittings as shown on drawings, or if not detailed, fabricate in accordance with SMACNA.
c. Fabricate ducts with adequate cross-bracing or reinforcing to prevent drumming; should drumming subsequently occur, provide additional reinforcement as necessary to overcome same.
d. Construct ducts to provide smooth passage for the conducted air, laying edges exposed to the airstream in the direction of air flow.
e. Fabricate elbows or other fittings for changing direction of duct with a centerline radius equal to 1.5 times the duct width unless shown otherwise or necessitated by space restrictions. Where square or short radius turns are shown or required, fit with air turning vanes.
f. Fabricate diverging transitions with side slopes of 1:6; fabricate converging transitions with side slopes of 1:2. Greater slopes may be used only where space restriction prohibits specified slopes.

2. Factory fabricated ductwork construction shall conform to applicable requirements stipulated above for shop fabricated ductwork.

B. Galvanized Steel Ductwork (GSD)

1. Rectangular Cross Section
a. Shop fabricated of prime grade lock seam for quality galvanized steel sheet in accordance with requirements stipulated above and fitted with auxiliaries and accessories as specified below and shown on the drawings.

2. Low Pressure Ductwork, up to 2" static pressure and 2,500 fpm:

3. Rectangular Duct: GSD gauge per SMACNA or C.M.C whichever is more stringent.

4. Round Duct: As manufactured by United McGill Corp or equal. Uni-Rib, UNIRIB DUCT machine formed, spiral lock seam construction spot welded and bonded seams with an 404
West Sacramento Fire Station 43 233113 - 2 Metal Ducts
intermediate standing rib for rigidity. Slip joint construction couplings with a minimum of 2" insertion length. GSD gauge per SMACNA or C.M.C whichever is more stringent.

5. Fittings: (except elbows) machine formed using SMACNA RL-1 seams with seal class B.

6. Plenums: Fabricate cross-brake panels and stiffen with galvanized steel angle iron members. Provide duct access doors as specified below and as shown on drawings.

7. Elbows: fittings shall have a wall thickness not less than that specified for longitudinal straight ducts as shown in Table 3-2 and 3-3, SMACNA HVAC Duct Construction Standards, Metal and Flexible, 4" - 8" two piece, die stamped with fully welded longitudinal seam; 9" - 30", segmented standing seam construction; 31" - 36", segmented construction with joint spot welded and bonded. Each segmented elbow shall have the number of segments as indicated by Table 3-1 SMACNA HVAC Duct Construction Standards, Metal and Flexible for above 1500 fpm.

C. Medium Pressure Duct, from above 2" to 6" static pressure and to 4000 fpm:

1. All ductwork shall be constructed per SMACNA guidelines or C.M.C whichever is more stringent for medium pressure ductwork.

2. Flat Oval Duct:
a. As manufactured by United McGill Corp or equal. Uni-Seal flat oval duct and fittings, spiral lock seam or fully welded longitudinal seam, as needed, construction, and FORC reinforcing connectors.

Major Axis
GSD Gage:

Fittings Gage:
up to 24"
24 20
25"- 36"
22 20
37"- 48"
22 18
49"- 60"
20 18
61" - 70"
20 16
71" & Up
18 16
b. Fittings: (except elbows) machined formed using SMACNA RL-1 seams with seal class A.

3. All ductwork shall be constructed per SMACNA guidelines or C.M.C whichever is more stringent for medium pressure ductwork.

4. Round Duct:
a. As manufactured by United McGill Corp or equal. Uni-Seal heavy gauge round duct and fittings machine formed, spiral lock seam or fully welded, as needed, construction for rigidity.
b. Fittings: (except elbows) machined formed using SMACNA RL-1 seams with seal class A.

5. Unless otherwise specified, standing seam joint shall be used wherever possible on all fittings. All standing seam joints shall be sealed with a UL-Classified zero flame spread and zero smoke developed cement specially formulated for bonding metal-to-metal joints.

In lieu of standing seam construction, joints may be solid welded or spot welded and bonded. All welded joints shall be coated with a protective paint, inside and out, to prevent damage to the galvanized surface. Spot-welded fittings shall have all joints sealed with a UL-Classified zero flame spread and zero smoke developed cement specially formulated for bonding metal-to-metal joints.

6. Elbows: fittings shall have a wall thickness not less than that specified for longitudinal straight ducts as shown in Table 3-2 and 3-3, SMACNA HVAC Duct Construction Standards, Metal and Flexible, 4" - 8" two piece, die stamped with fully welded longitudinal seam; 9" - 30", segmented standing seam construction; 31" - 36", segmented construction with joint spot welded and bonded. Each segmented elbow shall have the number of segments as indicated by Table 3-1 SMACNA HVAC Duct Construction Standards, Metal and Flexible for above 1500 fpm.
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West Sacramento Fire Station 43 233113 - 3 Metal Ducts

7. Divided-flow fittings shall be constructed with a radiused entrance to all branch taps and with no excess material projecting from the body into the branch tap entrance.

8. Liner for all fittings shall be as specified above.

D. Kitchen Exhaust Ductwork:

1. Kitchen Grease Exhaust Duct:
a. Ducts for Type I hoods shall be constructed of at least 0.055-inch-thick steel or stainless at least 0.044 inch in thickness per C.M.C Ch-5. b. All seams shall be made with a continuous liquid-tight weld or braze on the external surface of the duct system.

2. Dishwasher Exhaust Duct: Ducts for Type II hoods shall be stainless steel, minimum

0.044 inch thickness, welded seams to first vertical rise up shaft.

E. Conical Fittings:

1. Low pressure:
a. All conical fittings shall be constructed with a minimum 2” flare around entire perimeter and a minimum 1:2 slope unless noted otherwise.

2. Medium pressure:
a. All conical fittings shall be constructed with a minimum inlet equal to 1.5 times the outlet (1.5 x D) and a length equal to 0.7 times the outlet (0.7 x D) where D equals the duct diameter.
b. All conical fittings shall be constructed per SMACNA HVAC Construction Standards Metal And Flexible, figure 2-6
F. 45 degree entry fittings:

1. All 45 degree entry fittings shall be constructed per SMACNA HVAC Construction Standards Metal And Flexible, figure 2-6.

G. Fume Hood Exhaust Ductwork:

1. All fume hood exhaust duct shall be Type 316 Stainless Steel, 18-gauge minimum. All joints shall be welded.

2.02 DUCTWORK ACCESS
A. Duct Access Doors:

1. Access panels - Rectangular ducts
a. Size to provide easy access, but not less than 18" wide. b. Ventfabrics "Ventlok" insulated, hinged and latched type or equal

2. Access panels - Round ducts
a. Size to provide easy access, but not less than 18" wide. b. Ductmate-Metu round insulated access door or equal

3. Plenum doors: Fabricate of 16 gauge galvanized sheet metal, cross broken, stiffened with angle iron, and set airtight. On insulated plenums make doors double wall, filled with 3" thick 6 lb. density glass fiber insulation. Trim: Ventlok, Young, #370 or #264 hinges, #260 latch, #390 half round gasket.

2.03 DUCTWORK ADJUNCTS
A. Intake/Exhaust Screens: Provide ½” mesh 18 gauge galvanized iron bird screens at all exterior openings in mechanical system.

B. Combustion Air Openings: Provide corrosion resistant ¼” screen mesh at all combustion air openings except where ducts terminate in attics.

C. Insulation: As specified in Section 23 07 00, Insulation. 406
West Sacramento Fire Station 43 233113 - 4 Metal Ducts
D. Test Fittings: Ventlok #699.

E. Duct Penetrations:

1. Where ducts penetrate fire separations in the building, provide fire dampers or smoke/fire dampers as specified, shown and required by code.

2. Where ducts penetrate roof or exterior walls, provide 24 gauge galvanized sheet metal flashing and counterflashing; solder all joints and make watertight, including under all air handlers, around all duct work penetrations, and exhaust fans.

F. Sealants

1. Design Polymerics DP1020, Ductmate PROseal high velocity duct sealant, Childers CP146/CP-148, Fosters 32-19/32-17, or equal, UL 723, ASTM E-84

2. Low Shrinkage, flexible, and mildew resistant conforming to NFPA 90A and 90B G. Tapes and Adhesives:

1. Pressureless Tapes: Hardcast, 4" wide Type DT 5400 mineral impregnated woven fiber tape with manufacturer's FTA-20 activator/adhesive (indoors) and RTA-50 activator/adhesive (outdoors), applied with brush or roller in accordance with manufacturer's directions.

H. Transverse Duct Connections:

1. Traverse Joints: Ductmate or WDCI proprietary duct connection systems will be accepted. Ductwork constructed using these systems will refer to the manufacturers guidelines for sheet gauge, intermediate reinforcement size and spacing, and joint reinforcements. TDC/TDF/T-24 shall be constructed as a SMACNA T-24 flange.

2. The Ductmate companion angle with an integral polymer mastic seal shall be securely fastened to the duct walls using self-drilling screws, rivets or spot welding. Fastener spacing shall be as recommended by the manufacturer for the size or duct and the pressure class. The raw duct ends shall be properly seated in the integral mastic seal. A continuous strip of closed cell gasket tape, size 1/4" x 3/4", shall be installed between the mating flanges of the companion angles at each transverse joint, and the joint shall be made up using 3/8" diameter x 1" long plated bolts and nuts. Drive-on or snap-on cleats shall be used at spacings as recommended by the manufacturer.

3. The Ductmate system shall not be used for applications with duct gauges heavier than 16 gauge or lighter than 26 gauge.

4. Longitudinal Seams: Pittsburgh Lock shall be used on all longitudinal seams. All longitudinal seams will be sealed with a mastic sealant. Snaplock is not acceptable.

PART 3 - EXECUTION

3.01 APPLICATIONS
A. Galvanized Steel Ductwork (GSD): Except where specified or shown otherwise, use (GSD) conforming to requirements (Part 2), or cross section configuration shown, in all locations (indoor/outdoor, above/below grade, concealed/exposed).

B. Flexible Fibrous Glass Duct (FFG): Use (FFG) only where specifically called for on the drawings, as connection between terminal boxes and air outlets.

C. Kitchen hood and equipment exhaust duct shall be in accordance with CMC Chapter 5.

D. No round-to-round saddle taps are allowed.

3.02 DUCTWORK
A. Pressure-Velocity Classification:

1. All supply ductwork upstream of terminal units (medium pressure):
a. All ductwork shall be constructed per SMACNA static pressure class of positive +6” and a velocity of 4000 FPM.
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West Sacramento Fire Station 43 233113 - 5 Metal Ducts
b. Seal all joints and seams on all ducts and plenums per SMACNA seal class A.