California has its own set of regulations for new construction and alterations to existing structures in regard to accessibility, so it has unique ADA ramp requirements. The purpose of the California Building Code, as outlined in 1.1.2 of the Code, “is to establish the minimum requirements to safeguard the public health, safety and general welfare.” Below is a simple guideline to follow which encompasses standard 2010 ADA Regulations as well as the 2016 California Building Code. You can also download the pdf version of the California ADA Ramp Requirements.

Width: 48 inches clear space between handrails.
Rise: The rise for any single ramp run shall be 30 inches maximum which means it can be 30 feet long maximum.
Slope: Maximum is 1:12 slope which means 1 inch of rise for every 12 inches of ramp run. Read more about ADA ramp slope requirements.
Cross slope of ramp runs: Maximum 1:48.
Handrail height: 34 inches – 38 inches from the walking surface.
Handrail grip: 1-1/4 inch minimum to 2 inch maximum outside diameter for circular handrails. *For complete ADA ramp handrail requirements for California, view the California Building Code 11B-505.
Edge protection: A curb, 2 inches high minimum, shall be provided that prevents the passage of a 4-inch diameter sphere, where any portion of the sphere is within 4 inches of the finish floor or ground surface.

California Building Code Requirements for ADA Ramps
Exhibit A
California ADA Ramp Dimensions
Exhibit B

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Landing width: The landing must be at least as wide as the widest ramp run leading to the landing with a minimum dimension of 48 inches between the handrails. NOTE: Landings at the top of the ramp must be at least 60 inches wide in the direction of travel.
Landing length: Each landing must be at least 60 inches clear length. NOTE: Landings at the bottom of a ramp must extend 72 inches in the direction of travel past the edge of the ramp.
Landing at a change in direction: 72 inches x 60 inches minimum in the direction of DOWNWARD travel from the upper ramp run.

California Building Code Requirements for ADA Ramps
Exhibit C
California ADA Ramp Turning Platform Dimensions
Exhibit D
California ADA Ramp Landing Dimensions Switchback
Exhibit E

Landings with doors or gates: All ADA ramp landings with manual, swinging doors or gates in California must comply with maneuvering clearance regulations as well as minimum platform width regulations.

The California Building Code states, “Doors, when fully open, shall not reduce the required ramp landing width by more than 3 inches. Doors, in any position, shall not reduce the minimum dimension of the ramp landing to less than 42 inches.” (11B-405.7.5)

California ADA Ramp Landing at Doorway
Exhibit F

Recommended Platform Sizes: Below are the minimum platform sizes to accommodate both ADA ramp requirements for California and California Building Code ramp requirements involving maneuvering clearances and minimum landing dimensions:

Type of UseMinimum Maneuvering Clearance
Approach DirectionDoor or Gate SideLength (in direction of travel)Width (in direction of travel)3Parallel to Doorway (beyond latch side unless noted)Exhibit
FrontPull78″ (42″ + min. door width1)78″ (42″ + min. door width1)42″G.1
FrontPush60″60″0” 2G.2
Hinge sidePull138″ (42″ + min. door width1 + 12″ for required ramp handrail extension)78″ (42″ + min. door width1)42″G.3
Hinge sidePush60″60″22″G.4
Latch sidePull78″ (42″ + min. door width1)78″ (42″ + min. door width1)42″G.5
Latch sidePush60″60″24″G.6

1 . The ADA states that doors should be at least 36″ wide.
2 . Add 12″ if the door is equipped with both a latch and a closer.
3 . Platform must be at least as wide as the widest ramp run that leads to it.

California ADA Ramp Landing Requirements
Exhibit G *Not proportionally drawn
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