What is a sidewalk cross slope?
Sidewalk cross slopes are 2.0% or less. For example, a segment with the maximum allowed running slope of 8.33% would require 5′ x 5′ landing every 30′. • Sidewalk running slopes meet any of the following conditions: – The sidewalk is at the same grade as the roadway, regardless how steep the roadway grade is.
What is the maximum slope of a sidewalk before it is considered a ramp on a project site?
Ramps typically occur on an accessible route leading to a facility or otherwise separated from the street. The cross slope for all ramps is to be 1%, but a maximum of 2.0% is allowed by ADA standards.
How do you calculate sidewalk cross slope?
Cross slope is calculated by subtracting the difference in elevation between the two edges of the travel lane and dividing this difference by the lane width. For example, a typical 48:1 Normal Crown (NC) pavement cross slope is calculated as -0.0208 ft/ft or -2.08% for a 12 foot lane (Figure 1).
What is a good slope for a sidewalk?
Sidewalks shall have a cross slope of two percent (2%) grade, as cross slopes with a less than two percent (<2%) grade are known to cause drainage issues. Running slope or grades of a walking surface is the gradient measured parallel to the direction of travel.
What percentage is ADA?
For a ramp the maximum running slope allowed is 8.33% (8.33% is a 1:12 slope). For an accessible route without a ramp the maximum running slope allowed is 5% (1:20). For the cross slope of an accessible route the maximum slope allowed is 2.083% (1:48).
What is the standard size of a sidewalk?
Sidewalks should be wide enough to allow two adults to walk comfortably next to each other. A good standard width is 48 inches. Learn more about walkway widths.
What is the maximum ADA slope?
4.8.2* Slope and Rise The maximum slope of a ramp in new construction shall be 1:12. The maximum rise for any run shall be 30 in (760 mm).
Why is it not desirable to provide a very steep cross slope on pavements?
Pavements on straight sections of two-lane and multi lane roadways without medians are sloped from the middle downward to both sides of the roadway. Too steep slope is undesirable for it will erode the surface.