1. What is Ramp Slope Percentage?

Definition: Ramp slope percentage measures the steepness of a ramp by comparing its vertical rise to its horizontal run.

Purpose: It helps ensure ramps meet accessibility standards and safety requirements for wheelchair users and pedestrians.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

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 Slope Calculation

Details: Proper slope calculation ensures ADA compliance (maximum 8.33% for ramps), safety, and usability for all individuals.

4. Using the Calculator

Tips: Enter the vertical height and horizontal length in feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum slope for an ADA compliant ramp?
A: The maximum slope is 8.33% (1:12 ratio) for commercial ramps.

Q2: How do I measure height and length?
A: Height is vertical rise from bottom to top. Length is horizontal distance (not the ramp surface length).

Q3: What slope is too steep for wheelchairs?
A: Generally, slopes over 10% become difficult for manual wheelchair users.

Q4: How does slope affect ramp design?
A: Steeper slopes may require handrails, landings, or non-slip surfaces for safety.

Q5: Can I use different units?
A: Yes, but both height and length must use the same units for accurate results.