Concrete ADA Ramp Specs

Slope

• A concrete ADA ramp shall have a maximum slope of 1:12 ratio. This means that for every foot in height the ramp is trying to meet it has to extend out 12 feet in length. The ramp can not rise more then 30 inches without having a landing. The cross slope of the ramp can not be greater then 1:50 ratio. The concrete ramp surface shall be slip resistant and typically have a brush finish.

Landings

• A concrete ADA ramp shall have a level landing at the top and bottom of the ramp. If the ramp exceeds the 30 inches in height, then an intermediate landing is required. The landings need to be as wide as the ramp and are required to have a 5-foot clear depth. If the ramp switches directions then a landing is required that is at least 5-by-5-feet square. This allows for the 5-foot diameter turnaround clearance required to allow for a wheelchair to change directions.

Handrails

• All concrete ramps greater then 6 inches in height are required to have handrails on both sides of the ramp. The handrails shall be continuous and have a diameter of 1 1/4 to 1 1/2 inches. The handrails can be square or round as long as they are mounted between 34 to 38 inches from the concrete ramp surface. The ends of the handrails shall be rounded or continue to the floor or wall and extend 12 inches level to the top and bottom of the landings.