1. What is a Slope for Handicap Ramp Calculator?

Definition: This calculator determines the slope percentage of a handicap ramp based on its height and length.

Purpose: It helps architects, builders, and accessibility professionals ensure ramps meet ADA requirements for safe wheelchair access.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope percentage (%)
• \( H \) — Vertical height (feet)
• \( L \) — Horizontal length (feet)

Explanation: The height is divided by the length to get the slope ratio, then multiplied by 100 to convert to a percentage.

3. Importance of Proper Ramp Slope

Details: ADA guidelines recommend a maximum slope of 1:12 (8.33%) for wheelchair ramps. Proper slope ensures accessibility and safety for all users.

4. Using the Calculator

Tips: Enter the vertical height and horizontal length in feet. Both values must be > 0. The result shows the slope percentage.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum allowable slope for ADA compliance?
A: The maximum slope is 8.33% (1:12 ratio) for commercial ramps. Residential ramps may go up to 10% (1:10 ratio).

Q2: How does slope affect ramp usability?
A: Steeper slopes make it harder for wheelchair users to ascend and more dangerous to descend. Gentle slopes are more accessible.

Q3: What if my calculated slope exceeds ADA limits?
A: Increase the ramp length or add intermediate landings to break up the elevation change.

Q4: Does this include handrail requirements?
A: No, this only calculates slope. ADA requires handrails for ramps with a rise > 6 inches or horizontal projection > 72 inches.

Q5: How do I measure height and length accurately?
A: Height is vertical rise from ground to landing. Length is horizontal run (not the diagonal ramp surface length).