May 13, 2025
Curb Ramp Standards and Conflict Resolution in Design
Curb Ramp Standards
City of Rialto Standard No. SC-215 – Curb Ramp
City of Rialto Standard No. LMD-PLT-663 (Typical Rock Treatment Assembly) SPPWC Standard Plan 115-5 – Curb Ramp
Caltrans Standard Plan A88A – Curb Ramp Details
Design Considerations
ROW Requirements to Construct Standard Design Case A Type 3 ADA Landing
In order to provide a code-compliant ADA landing at the back of an 8.33% maximum grade ramp, a retainer curb is required without additional ROW.
8.33% Max.
Landing
Retainer curb constructed within existing ROW
Additional corner cutoff ROW required from private property to construct standard curb ramp case Existing ROW does not allow for Standard case ramp
Curb Ramp Design (Modified SC-215 Case B Type 2)
ROW acquisition across the frontage would require appraisal and purchase. A crosswalk is only needed in one direction.
Utility equipment adjusted to grade in cobble “deck”, but not relocated, avoiding additional cost and time coordinating with Utilities for relocation.
Costly drainage improvement relocation avoided by selection SC-215 Case B Type 2 and modifying ramp detail for site conditions and conflicts.
Retainer curb constructed to create deck and to accommodate existing grade on private property.
Modified Curb Ramp