PDX_02_ADA Dimensional Standards

Question 0

2 wheelchair passing width

Answer 0

60 inches minimum clear

Question 1

Wheelchair passage width

Answer 1

32 inches clear at a point

36 inches clear continuous

Question 2

Headroom

Answer 2

80” minimum

Question 3

Turning space

Answer 3

5 foot circle minimum

Question 4

Clear floor space

Answer 4

2’6” wide by 4’0” long min

Question 5

Cross slope of a ramp

Answer 5

1:50 maximum

Question 6

Door opening width

Answer 6

32 inches clear minimum when open 90°

Question 7

Door clearance

Answer 7

1’6” clear on the pull side of door

1 foot clear on the push side of door

Question 8

Change in level

Answer 8

1/4” max without edge treatment

Question 9

Beveled edge is okay on the level change between

Answer 9

1/4” - 1/2” w 1:2 max slope

Question 10

Level change that requires a ramp

Answer 10

Half-inch or more

Question 11

Ramp slope

Answer 11

1:20 min - 1:12 max

Question 12

Ramp with

Answer 12

3’0” wide minimum

Question 13

Maximum ramp length

Answer 13

30’0” maximum

Question 14

Ramp landings

Answer 14

5’0” at each end x width of ramp

Question 15

Ramp needs 2 handrails when:

Answer 15

Rise is greater than 6 inches

Or run is greater than 72 inches

Question 16

Handrail height is between

Answer 16

34” - 38”

Question 17

Handrail cross-section has diameter between ____ and clear from wall ____.

Answer 17

Diameter 1-1/4” to 2”

1-1/2” clr from wall

Question 18

Handrail must extend this distance at the top and bottom of stair or ramp

Answer 18

12” past top and 12” + one tread at the bottom

Question 19

Clearance required between handrails minimum

Answer 19

48” clear

Question 20

Knee clearance for wheelchair under a desk

Answer 20

27” high minimum
8” deep at top
11” deep at bottom