According to the International Residential Code, what is the maximum slope permitted for a new ramp serving the egress door in an existing dwelling?

The International Residential Code (IRC) specifies that for new ramps serving egress doors in existing dwellings, the maximum slope allowed is 1:12. This means that for every 12 units of horizontal distance, there can be a rise of 1 unit.

This slope is designed to provide accessibility while ensuring safety for individuals using the ramp, particularly those with mobility challenges. A 1:12 slope is manageable for most users, making it less strenuous to ascend or descend compared to steeper slopes. It balances accessibility requirements with safety considerations, thereby reducing the risk of accidents associated with steeper inclines.

In the context of ramp construction and design, adhering to this maximum slope promotes compliance with standards for safe egress. Ramps with gentler slopes are easier to navigate and are less likely to pose a hazard to users.