What is the maximum allowable slope for a residential ramp?

The maximum allowable slope for a residential ramp is 1:12. This means that for every inch of vertical rise, there should be at least 12 inches of ramp run, making it easier for individuals with mobility challenges to navigate. This ratio is widely accepted in building codes and accessibility guidelines, including those established by the ADA (Americans with Disabilities Act).

A slope of 1:12 is considered the most effective compromise between safety and usability, as it provides a gentle incline that reduces the risk of slipping or falling and makes it more manageable for users, including those in wheelchairs or using other mobility aids.

Adhering to this standard is crucial for ensuring that ramps are accessible and safe for all users. The other options represent steeper slopes which would make the ramp more difficult to use safely; thus, they do not meet the best practices for accessibility in residential settings.