According to ADA requirements, what is the maximum slope allowed for an accessible ramp?
Correct Answer
B) 1:12 (8.33%)
ADA requires accessible ramps to have a maximum slope of 1:12 (8.33%). This ensures wheelchair accessibility while maintaining safety standards.
Why This Is the Correct Answer
The ADA (Americans with Disabilities Act) specifically mandates that accessible ramps must not exceed a slope of 1:12, which equals 8.33%. This ratio means for every 12 inches of horizontal run, the ramp can rise no more than 1 inch vertically. This standard balances accessibility for wheelchair users with safety considerations, ensuring ramps are not too steep to navigate safely. The 1:12 ratio is a fundamental ADA compliance requirement that all contractors must follow when constructing accessible facilities.
Why the Other Options Are Wrong
Option A: 1:8 (12.5%)
A 1:8 slope (12.5%) is too steep and exceeds ADA requirements, making it dangerous and non-compliant for wheelchair accessibility.
Option C: 1:16 (6.25%)
While 1:16 (6.25%) is more gradual and would be compliant, it's not the maximum allowed slope - the question asks for the maximum, which is 1:12.
Option D: 1:20 (5%)
While 1:20 (5%) is more gradual and would be compliant, it's not the maximum allowed slope - the question asks for the maximum, which is 1:12.
Memory Technique
Remember '12 disciples, 1 slope' - the 1:12 ratio is the key ADA ramp requirement, or think 'ADA = Always Divide by 12' for maximum slope.
Reference Hint
Florida Building Code Chapter 11 - Accessibility, or ADA Standards for Accessible Design Section 4.8.2
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