Any part of an accessible route with a slope greater than 1:20 is considered a ramp. The 1:20 ratio refers to the change in height. For example for every one foot in rise, the length of the slope is 20 feet.
The term "clear width" refers to the width of the ramp that is fully accessible, meaning the open area that is not impeded by handrails or other obstructions. Most guidelines establish a minimum clear width for concrete ramps, which varies according to the purpose of the ramp.
A landing is a flat area at the summit and base of each ramp. A landing provides the user an opportunity to rest or stop without being on a slope. Landings have minimum area requirements, depending on the intended use of the ramp.
"Edge protection" is the term used for protective measures that prevent users of the ramp from falling over the edge of the ramp. Such measures include walls, curbs or railings.
A handrail is a railing secured at a reachable height on a ramp that a disabled or elderly person can grab for support during an ascent or descent of the ramp.
"Cross slope" refers to the slope on the width of the ramp. This must be of an extremely shallow maximum gradient of 1:50 to ensure safe passage for the user.