2010 ADA Standards for Accessible Design Pocket Guide
Landings shall be provided at the tops of curb ramps. The landing clear length shall be 36 inches (915 mm) minimum. The landing clear width shall be at least as wide as the curb ramp, excluding flared sides, leading to the landing. [S.H. 4.7.5]
EXCEPTION: In alterations, where there is no landing at the top of curb ramps, curb ramp flares shall be provided and shall not be steeper than 1:12.
ETA Editor’s Note:
Where insufficient space is available for a top landing, a parallel curb ramp as equivalent facilitation may be a better solution than flared sides.