What is the typical maximum ramp slope in ADA standards?

• A. 1:20 slope
• B. 1:12 slope
• C. 1:8 slope
• D. 1:6 slope

Answer: (B)

Ramps for accessibility are limited in how steep they can be to keep wheelchairs and other mobility devices able to climb safely. The typical maximum ramp slope in ADA standards is 1:12, meaning for every 12 inches of horizontal run, the rise can be no more than 1 inch. That translates to about a 4.8-degree incline, which balances ease of use with practical building length. If the rise is greater than that, the ramp must be broken into shorter sections with landings or use an alternative like an elevator. Slopes steeper than this (such as 1:8 or 1:6) would not meet accessibility requirements, while a gentler slope like 1:20 is allowed but would require a longer ramp.