What is the recommended slope for a 4-foot sidewalk?

For a 4-foot sidewalk, the recommended slope is typically set at 5%. This slope ensures adequate drainage while also providing accessibility for pedestrians, including those using wheelchairs or other mobility devices. A 5% slope corresponds to a one-to-one ratio of rise to run, or a 1:20 slope, which is manageable for users while effectively directing water away from the surface without creating a steep incline that could pose safety hazards or accessibility issues.

This standard is especially important in compliance with guidelines such as the Americans with Disabilities Act (ADA), which emphasizes the necessity of manageable slopes to facilitate safe access for all individuals. Adhering to this recommended slope helps prevent water from pooling on the sidewalk, thereby minimizing potential slip hazards and ensuring that the sidewalk serves its function effectively.

The other slope options, including percentages like 3%, 7%, and 10%, either do not comply with recommended practices for sidewalks or create challenges in terms of drainage and accessibility. A 3% slope might not sufficiently facilitate drainage, while a 7% or 10% slope can be too steep, presenting challenges for individuals with mobility impairments. Thus, 5% is recognized as the most appropriate choice for a sidewalk of this width.