Spinal Cord Injury Center Design Guide
July 1990 (Rev. Jan. 2004)
Ramps 7
Function:
To provide handicapped access to building entrances or across steep topography
where a gradual incline is not possible, i.e., any walkway that exceeds a 3% slope.
Requirements:
1.
Maximum slope of 1:20 (5%).
2.
Minimum clear width of 4'-0".
3.
Cross slope of 1:50 (2%).
4.
Slip-resistant surface.
5.
A level area of 5'-0" x 5'-0" provided at the top and bottom of each ramp.
6.
Landings at least 5'-0" long.
a. Every 40' when slope is 1:33 (3%) to 1:24 (4%).
b. Every 35' when slope is 1:25 (4%) to 1:20 (5%).
7.
Handrails installed on both sides and mounted at a height of 2'-9" and extend
1'-0" beyond beginning and end of ramp.
8.
4" high x 8" wide curbs on each side to prevent wheelchairs from scuffing walls or
catching on railing posts. Such curbs also enable a person to stop a wheelchair
that is out of control quickly by turning one wheel against the curb.
Figure V-6
Office of Facilities Management
257
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