What is the maximum slope allowed for ramps in egress?

The maximum slope allowed for ramps in egress is 1:12. This means that for every inch of vertical rise, there must be at least 12 inches of ramp run. This guideline is established to ensure accessibility and safety for individuals using wheelchairs or other mobility aids, as it provides a manageable incline that minimizes the risk of slipping and falls while allowing for easier navigation.

A slope of 1:12 is considered the optimal balance between functionality and safety, making it a standard requirement under accessibility codes such as the Americans with Disabilities Act (ADA). While the other slope ratios may indicate options for different types of ramps, they do not meet the minimum accessibility guidelines for egress ramps, which must facilitate safe and efficient movement for all users, particularly those with disabilities.