On ramps with a maximum slope, what is the maximum slope without requiring handrails?

The maximum slope for a ramp without requiring handrails is set at a ratio of 1:12. This means that for every 12 units of horizontal distance, there can be a rise of 1 unit. This guideline is established to ensure safety and accessibility, especially for individuals with disabilities. A slope steeper than this could make it difficult for those using wheelchairs or other mobility aids to navigate safely.

If a ramp exceeds this 1:12 ratio, handrails are needed to provide additional support and safety for users. This standard is emphasized in various accessibility guidelines and building codes, which prioritize the safety and usability of ramps in public and private buildings.

In contrast, the other slope ratios presented would either be flatter or steeper. Slopes like 1:8 would be excessively steep, while those like 1:15 or 1:18 would not pose issues regarding handrail requirements but are not the maximum slope without handrails. Therefore, ratio 1:12 is established as the acceptable standard in this context.