What is the pitch for handicap ramp?

By Marc Siegenthaler, On 3rd August 2021, Under Sports
1:12

People also ask, what is the maximum allowable slope for a ramp?

The least possible slope should be used whenever possible. The maximum allowable slope in any new construction is 1:12 with a maximum rise of 30” (76.2 cm) without a landing. A ramp with a slope between 1:12 and 1:16 can have a maximum horizontal length of 30' (9.14 m) without a landing.

One may also ask, how is ADA ramp slope measured?

If the distance between the bottom of the level and the ramp surface is 2 inches or less, then the slope is 1:12 or less (2:24 = 1:12 and 1.5:24 = 1:16 which is a more gradual slope than 1:12). If the distance is greater than 2 inches, the ramp is too steep.

What size ramp do I need for 3 steps?

Here are some factors that should be considered: Stairs typically run about 7.5 inches high each so for three stairs a standard rise or height would be about 22 inches. The ADA [Americans with Disabilities Act] recommends 1 foot for ramp for every one inch of rise.

What is a good angle for a ramp?

Bottom line: recommended ramp slope:
The preferred slope for a building access ramp is 1:12 or 1 inch of rise per 12 inches of horizontal run - that's roughly an 8% slope also written as a 4.8 degree angle slope.
Maximum slope for hand-propelled wheelchair ramps should be 1" of rise to every 12" of length (4.8 degree angle; 8.3% grade). Maximum slope for power chairs should be 1.5" rise to 12" length (7.1 degree angle; 12.5% grade). Minimum width should be 36" (inside rails) - (48" is ideal).
For a ramp the maximum running slope allowed is 1:12. That means for every inch of height change there should be at least 12 inches of ramp run. For example, if the distance is 3 inches, then the slope is 1:8 (3:24 = 1:8 which is a steeper slope than 1:12).
ANSWER: There is no maximum length a compliant accessible ramp can be. However, a ramp is limited to a 30″ maximum rise and then a level landing must be provided before the rise continues. A ramp can slope no more than 1:12 (8.3%) and if the rise is 1:20 (5%) or less it is not considered a ramp.
Instead, the recommended slope is one inch vertically for every 16 inches horizontally, or about 3.58 degrees. This slope is easily manageable by both people walking as well as by most wheelchair users, so I believe that it is the maximum good slope. The ADA also requires that no single ramp rise higher than 30 inches.
For example, a 10 percent grade is 10/100, and a 25 percent grade is 25/100.
Calculating the Slope
Divide the length of the ramp by the height. This will be the second number in your ratio. The first number is always one. If the ramp measures 12 feet long and the rise is 2 feet, you would divide 12 by 2 to get 6, and your ratio would be 1 to 6.
Table of Common Slopes in Architecture
Degrees Gradient Percent
4.76° 1 : 12 8.3%
7.13° 1 : 8 12.5%
10° 1 : 5.67 17.6%
14.04° 1 : 4 25%
ADA requires that all business and public use ramps adhere to a 1:12 slope ratio, meaning that for every inch of vertical rise there must be 12 horizontal inches (one foot) of ramp.
1:12 scale is a traditional scale (ratio) for models and miniatures, in which 12 units (such as inches or centimeters) on the original is represented by one unit on the model. Depending on application, the scale is also called one-inch scale (since 1 inch equals 1 foot).
1 Calculating percent slope. A rise of 100 feet over a run of 100 feet yields a 100 percent slope. A 50-foot rise over a 100-foot run yields a 50 percent slope. Another way to express slope is as a slope angle, or degree of slope.
Wheelchair Ramp Slope and Percent of Grade Information
To determine the percent of grade: divide rise by the run of ramp. Run is not the length of the ramp. The distance horizontally (not along the slope) from the top of the ramp to the bottom.