36 inches is the maximum height.

8.33% is the maximum for a ramp slope. 

The slope requirements for different parts of an accessible route vary.

Walkways 5%
Ramps 8.33%
Landings 2%
Elevator car 2%
Accessible parking 2%

30” x 48” is the minimum width. 

The clear width of walking surfaces must be 36 inches minimum

15” minimum
48” maximum

36” minimum, if serving elements are on only one side; otherwise 44” minimum.

Van stall must be 9’ wide (with 8’ wide loading area) by 18’ long, or 12’ wide (with 5’ wide loading area) by 18’ long.

DA requirements for apartments came into effect on March 13, 1991.