A single swinging door on an accessible route is checked with the door open 90 degrees. What minimum clear opening width must be provided?
Correct Answer
D) 32 in.
ICC A117.1/ADA door criteria use a 32 in. minimum clear opening width measured with the door open 90 degrees. Other choices are too narrow, while 36 in. is a common nominal door leaf size rather than the required clear opening.
Why This Is the Correct Answer
ICC A117.1/ADA door criteria use a 32 in. minimum clear opening width measured with the door open 90 degrees. Other choices are too narrow, while 36 in. is a common nominal door leaf size rather than the required clear opening.
Why the Other Options Are Wrong
Option A: 28 in.
The trap in A is 28 in. That selection is wrong because 28 in. is a different published number than the cited Accessible door clear width value; ICC A117.1-2017 Section 404.2.2 / 404.2.3 clear width supports 32 in.; Accessible doorways require at least 32 in.
Option B: 30 in.
Choice B gives 30 in. Its specific error: 30 in. is a different published number than the cited Accessible door clear width value; ICC A117.1-2017 Section 404.2.2 / 404.2.3 clear width supports 32 in. The accepted answer is 32 in.
Option C: 36 in.
Choice C (36 in.) is rejected because 36 in. is a different published number than the cited Accessible door clear width value; ICC A117.1-2017 Section 404.2.2 / 404.2.3 clear width supports 32 in. The cited answer is 32 in.
Memory Technique
Treat accessible door clear width like a labeled shelf; only the matching condition belongs with 32 in.
Reference Hint
Open ICC A117.1-2017 Accessible and Usable Buildings and Facilities; use ICC A117.1-2017 Section 404.2.2 / 404.2.3 clear width to confirm that ICC A117.1/ADA door criteria use a 32 in.
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