1. What is the ADA Ramp Calculation?

The ADA (Americans with Disabilities Act) ramp calculation determines the minimum length required for a ramp based on its vertical rise. The standard requires a 1:12 slope, meaning for every 1 inch of vertical rise, 12 inches of ramp length is required.

2. How Does the Calculator Work?

The calculator uses the ADA ramp formula:

Where:

• \( Length \) — Required ramp length (feet)
• \( Rise \) — Vertical height change (feet)
• \( 12 \) — Slope ratio (1:12)

Explanation: This formula ensures compliance with ADA accessibility standards by maintaining the proper slope for wheelchair access.

3. Importance of ADA Ramp Compliance

Details: Proper ramp design is crucial for accessibility, safety, and legal compliance. ADA-compliant ramps ensure that people with mobility disabilities can access buildings and facilities safely.

4. Using the Calculator

Tips: Enter the vertical rise in feet. The calculator will determine the minimum ramp length required to meet ADA standards. All values must be valid (rise > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum rise for a single ramp run?
A: ADA standards limit a single ramp run to a maximum 30-inch rise before requiring a landing.

Q2: Are there exceptions to the 1:12 slope rule?
A: In existing buildings where space is limited, a 1:10 or 1:8 slope may be allowed for short rises, but 1:12 is the preferred standard for new construction.

Q3: What about ramp width requirements?
A: ADA requires a minimum clear width of 36 inches between handrails.

Q4: Are handrails required on all ramps?
A: Handrails are required on both sides of ramps with a rise greater than 6 inches or a horizontal projection greater than 72 inches.

Q5: What are the landing requirements?
A: Landings are required at the top and bottom of ramps, at changes in direction, and every 30 feet of vertical rise. Landings must be at least 60 inches long and as wide as the ramp.