1. What is the ADA Ramp Calculation?

The ADA (Americans with Disabilities Act) requires a 1:12 slope for ramps, meaning for every 1 inch of vertical rise, there must be at least 12 inches of ramp run. This calculator determines the minimum ramp length needed for a given height.

2. How Does the Calculator Work?

The calculator uses the ADA ramp equation:

Where:

• \( height \) — Vertical height in feet
• \( length \) — Required ramp length in feet

Explanation: The 1:12 slope ratio means for every foot of vertical rise, you need 12 feet of ramp length.

3. Importance of ADA Ramp Compliance

Details: Proper ramp slope is crucial for accessibility, safety, and legal compliance. The 1:12 slope is the maximum allowed by ADA standards for wheelchair accessibility.

4. Using the Calculator

Tips: Enter the vertical height in feet that needs to be overcome by the ramp. The calculator will determine the minimum required ramp length.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum rise for a single ramp run?
A: ADA requires that no ramp run may exceed 30 inches of rise without a landing.

Q2: Are there exceptions to the 1:12 ratio?
A: Existing sites may use 1:10 or 1:8 slopes under certain conditions, but new construction must use 1:12.

Q3: What about ramp width requirements?
A: ADA requires ramps to be at least 36 inches wide between handrails.

Q4: Do I need handrails?
A: Yes, ramps with a rise greater than 6 inches require handrails on both sides.

Q5: Are there landing requirements?
A: Yes, ramps must have level landings at the top and bottom, and every 30 feet of horizontal run.