What is the maximum allowable slope for ADA ramps?

The maximum allowable slope for ADA (Americans with Disabilities Act) ramps is 1:12. This means that for every inch of vertical rise, there should be at least 12 inches (or 1 foot) of ramp run. This standard is set to ensure accessibility for individuals using wheelchairs or other mobility devices, as steeper slopes can pose significant challenges and safety risks.

A slope of 1:12 provides a manageable incline that balances usability and safety, promoting greater independence for users. Ramps meeting this requirement are more likely to facilitate safe access to buildings and other elevated areas, enhancing compliance with accessibility laws and best practices.

Other slopes, such as 1:8 and 1:10, are steeper than the recommended maximum and may create difficulties for users with mobility limitations. While a slope of 1:20 is even more gradual and offers greater ease of use, it exceeds the minimum requirement needed for determining maximum allowable slope under ADA guidelines.