1. What is a Ramp Length Calculator?

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

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 to overcome (feet)
• \( S \) — Slope ratio (unitless, e.g., 0.0833 for 1:12 slope)

Explanation: The height is divided by the slope ratio to determine the necessary ramp length to achieve that slope.

3. Importance of Proper Ramp Length

Details: Correct ramp length ensures ADA compliance, safety for wheelchair users, and proper functionality of the ramp.

4. Using the Calculator

Tips: Enter the height in feet and the desired slope ratio (default 0.0833 for 1:12 slope). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope ratio for ADA-compliant ramps?
A: The ADA recommends a maximum slope of 1:12 (0.0833 ratio) for wheelchair ramps.

Q2: How do I convert slope ratio to degrees?
A: Use the formula: degrees = arctan(slope ratio). For 1:12 slope, it's about 4.76°.

Q3: When would I use a different slope ratio?
A: Steeper slopes may be used for limited space (max 1:8 for residential), while gentler slopes (1:16) are better for high-use areas.

Q4: Does this include landing requirements?
A: No, remember to add platform landings at top, bottom, and every 30 feet of ramp length.

Q5: How does ramp length affect construction?
A: Longer ramps require more materials and space but provide safer, more comfortable access.