ADA Ramp specifications

Question 1

Ramp slope

Answer 1

The steepest allowed slope is 1:12. Ramps should be built with the least slope possible. Any slope greater than 1:20 is considered a ramp and must meet ADA design guidelines

Question 2

Landings

Answer 2

Landings are required on every ramp at the top and bottom, at changes of direction and anytime the ramp has a vertical gain of 30 inches. Landings must be at least as wide as the ramp and a minimum of 60 inches in the direction of travel. When ramps change direction, landings must be at least 60 by 60 inches

Question 3

Handrails

Answer 3

Any ramp with a rise of more than six inches is required to have handrails on both sides. Handrail designs are provided in the ADA standards.

Question 4

Guardrails

Answer 4

The International Building Code requires guardrails on sides of ramps that are more than 30 inches above the adjacent grade. Guardrail baluster design must prevent the passage of a four-inch sphere.