1. What is a Ramp Slope Length Calculator?

Definition: This calculator determines the required length of a ramp based on the height to be overcome and the desired slope percentage.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Ramp length (feet)
• \( H \) — Height difference (feet)
• \( S \) — Slope percentage (%)

Explanation: The height is divided by the slope (converted from percentage to decimal) to determine the required ramp length.

3. Importance of Ramp Slope Calculation

Details: Proper ramp slope ensures accessibility compliance (ADA recommends 1:12 slope or 8.33% maximum), user safety, and comfortable use for wheelchair users.

4. Using the Calculator

Tips: Enter the height difference in feet and desired slope percentage. Typical slopes range from 5% (gentle) to 8.33% (ADA maximum).

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum slope for ADA compliance?
A: The ADA requires a maximum slope of 1:12 (8.33%) for wheelchair ramps.

Q2: How does slope percentage relate to ratio?
A: Slope percentage is rise over run × 100. A 1:12 ratio equals 8.33% slope.

Q3: When would I use a steeper slope?
A: Steeper slopes (up to 10-12%) may be used for short ramps where space is limited, but aren't ADA compliant.

Q4: Does this calculation account for landings?
A: No, remember to add landing space (minimum 5' long) at top, bottom, and every 30' of ramp length.

Q5: How does ramp length affect usability?
A: Longer ramps with gentler slopes are easier to use but require more space. Balance accessibility needs with available space.