ADA Accessibility Guidelines
4.8.2 Slope & Rise. The least possible
slope shall be used for any ramp. The maximum slope of a ramp in new construction shall be 1:12. (one foot of ramp for each
inch of rise) The maximum rise for any run shall be 30 inches. (ramp sections may be up to 30 feet long)
Width. The minimum clear width of a ramp shall be 36 inches.
A4.2.1 Wheelchair Passage Width. 48 inches is the
minimum width needed
for an ambulatory person to pass a non-ambulatory or semi-ambulatory person. (to allow a person
to walk past a person in a wheelchair, ramps should be 4 feet wide)
4.8.4 Landing. Ramps shall have level landings
at bottom and top of each
ramp and each ramp run.
(1) The landing shall be at least as wide as the
ramp run leading to it.
(2) The landing length shall be a minimum of 5 feet in length.
(4 foot wide ramps
require a 4 x 5 landing.)
(3) If ramps change direction at landings, the minimum landing size shall be 5 x 5. (left
& right turns need a 5 x 5 landing, u-turns require a 5 x 8 landing)
4.8.5 Handrails. If a ramp run has a rise
greater than 6 inches then it shall have handrails. (ramps longer than 6 feet require handrails on both sides, handrails
should be 34-38 inches in height)
4.8.7 Edge Protection. Ramps and landings with drop-offs shall have curbs, walls,
railings or projecting surfaces that prevent people from slipping off the ramp. Curbs shall be a minimum of 2 inches high.
4.8.8 Outdoor Conditions. Outdoor ramps and their approaches shall be
designed so that water will
not accumulate on walking surfaces.
(notes) are Outback Etc. clarifications
of the guidelines.