What is the appropriate vertical circulation for parking ramps and speed ramps?*

Ramp slopes with parking generally range from 5% to 6.67% maximum. Further, speed ramp slopes range from 6.67% to 16 %.

Considering vertical circulation of floor to floor heights, these typically range from 10’0” to 12’0”. According to code, minimum required clearances are 8’2” for van accessible parking, and 7’0” for regular and other accessible spaces. In multilevel parking structures, van accessible parking spaces are permitted on one level.



A standard ramp length with parking for a precast garage is 180’0”. This can be sub-divided into five 36’ bays, or four 45’ bays.

For a garage with a 10’ floor to floor height, the ramp slope will be 5.56%.
10’4” results in a 5.74% slope.
10’8” results in a 5.93% slope.
11’0” results in a 6.11% slope.
11’4” results in a 6.29% slope.
11’8” results in a 6.48% slope.
12’0” results in a 6.67% slope.