Running slope The longitudinal gradient of a sidewalk, measured parallel to the primary direction of pedestrian travel, indicating the steepness of the walkway.
The ADA dictates that the running slope of an accessible pathway must not exceed 5.00% (a 1:20 ratio), unless constructed as a formal ramp, which is allowed a maximum slope of 8.33% (a 1:12 ratio). When municipal sidewalks follow existing natural street grades, they must adhere as closely to these thresholds as possible. NYC contractors must take careful elevation readings during excavation and grading to ensure the final paved surface remains within legal running slope tolerances.
Frequently Asked Questions About Running slope
What is running slope?
The lengthwise gradient of a sidewalk, measured parallel to the direction of travel.
What is the maximum for a pedestrian route?
Generally 5 percent, a 1:20 ratio, unless the segment is designed as a ramp.
What is allowed for a ramp?
Up to 8.33 percent, a 1:12 ratio, with the landings and other ramp requirements that come with it.
What happens on naturally steep streets?
Sidewalks generally follow the existing street grade, but the work must stay as close to the thresholds as the site allows and avoid abrupt changes.