accessibility standards and environmental modifications

average wheelchair width

24”-26”

minimum and ideal doorway width

• minimum: 32”

• ideal: 36”

hallways

36” wide

average wheelchair length

42”-43”

360 degree wheelchair turning space requires a clearance space of

60” x 60”

maximum height an individual can reach forward without an obstruction

48” with low forward reach should be 15” above the floor to prevent tipping

maximum height for reaching sideways from sitting without and with an obstruction

• without 54”

• with 46”

maximal heights for countertops

• 36”

• heights no higher than 34” are often preferred

• some prefer as low as 28”

parking spaces

adjacent 5’ access aisle to allow w/c to maneuver

pathways and walkways should be a minimum of

36” wide

ramps should be a minimum of

36” wide and should have nonskid surfaces

ratio of slope to rise for a ramp is

• 1:12

• every 1” of vertical rise, 12” of ramp is required

railings for ramps

34” and 38” high

how big are landings supposed to be on ramps

5’ x 5’

180 degree turn on ramp requires

minimum 4’ x 8’ landing

if ramp leads to a door

5’ x 5’ platform before the door that extends at least 12” (18” preferred) along the side of the door