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.