1. What is a Ramp Calculator for PWD?

Definition: This calculator determines the required ramp length for persons with disabilities based on the ADA-recommended 1:12 slope ratio.

Purpose: It helps architects, builders, and accessibility planners design ramps that meet accessibility standards.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Length of ramp (feet)
• \( H \) — Height/vertical rise (feet)

Explanation: For every 1 foot of vertical rise, 12 feet of ramp length is required to maintain the ADA-compliant 1:12 slope ratio.

3. Importance of Proper Ramp Calculation

Details: Correct ramp length ensures accessibility, safety, and compliance with disability access regulations.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is the 1:12 ratio important?
A: This is the ADA-recommended maximum slope for wheelchair accessibility, providing a safe and manageable incline.

Q2: What if my space can't accommodate this length?
A: You may need to consider switchback ramps, platform lifts, or consult local accessibility guidelines for alternatives.

Q3: Does this include landing spaces?
A: No, remember to add landing areas (minimum 5'x5') at the top, bottom, and where the ramp changes direction.

Q4: What about handrails?
A: Ramps with a rise greater than 6" require handrails on both sides according to ADA standards.

Q5: Can I use a steeper slope for short rises?
A: For very short rises (≤6"), a 1:8 slope may be permitted in some jurisdictions, but always check local codes.