The ADA ramp specifications are in place to help those with disabilities easily get in and out of buildings. Without these specifications many ramps would be too difficult for those in wheelchairs to use. If you are installing a ramp in an office, place of business, or other location that the ADA regulations may apply, it's important to know the specifications.
A ramp that slopes between 1:16 and 1:20 is suggested by the ADA. A slope of 1:16 is easily managed by most people who need to use a ramp. A slope any steeper than that can provide difficulty for those with low stamina. The ADA prefers that a ramp with the lowest possible slope be used.
According to the ADA guidelines, the clear width of the ramp should be no less than 36 inches across. This will allow wheelchairs with the space they need to move along the ramp safely and with ease.
The landing on a ramp is just as important as the ramp itself. A ramp that is uneven can cause a wheelchair user to tip or bottom out. The ADA has specific requirements for a landing. They should be as wide as the ramp, have a 60 inch clearing, and leave enough room to access doorways.
You can find all of the ADA requirements by visiting their website.