What is the maximum slope allowed for a ramp serving an exit?

The maximum slope allowed for a ramp serving an exit is indeed 1:12, which corresponds to an 8.33% gradient. This standard is established to ensure accessibility and safety for individuals who may have mobility impairments. A gradient of 1:12 means that for every 12 units of horizontal distance, the ramp may rise no more than 1 unit vertically. This slope strikes a balance between being manageable for users and ensuring that the ramp does not become excessively steep, which could pose a risk for slips and falls.

Additionally, this gradient is consistent with accessibility guidelines as outlined in the Americans with Disabilities Act (ADA), which specifies slope requirements for ramps to promote safe and accessible navigation for all individuals. The maximum slope specified is designed to accommodate the needs of users in wheelchairs or those using mobility aids, thereby helping to create an inclusive environment in public spaces.