For existing Class A ramps, what is the required ratio?

For existing Class A ramps, the required ratio of the slope is 1:12. This means that for every inch of vertical rise, there should be at least 12 inches of horizontal run. This slope ratio is important for ensuring accessibility and safety for individuals using the ramp, particularly for those with disabilities or mobility challenges.

The 1:12 ratio helps to prevent steepness that could make the ramp difficult or hazardous to navigate. It is important for fostering compliance with accessibility standards, such as those outlined in the Americans with Disabilities Act (ADA). This ratio ensures that the ramp is not only functional but also provides a safer option for those who need to utilize it.

Other ratios, such as 1:6, 1:8, or 1:10, would create a steeper ramp that could pose challenges for users, potentially leading to difficulties in maneuvering up or down the ramp safely. Therefore, the adoption of the 1:12 ratio is critical in the design and evaluation of ramps to ensure they meet proper safety and accessibility standards.