1. What is a Ramp Length Calculator?

Definition: This calculator determines the required length of a ramp based on the height that needs 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 (dimensionless ratio, e.g. 1/12 = 0.0833)

Explanation: The height is divided by the slope ratio to determine the necessary ramp length for safe and comfortable access.

3. Importance of Proper Ramp Length

Details: Correct ramp length ensures ADA compliance, wheelchair accessibility, and safe use for all individuals. Too steep ramps can be dangerous.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the standard slope for accessibility ramps?
A: The ADA recommends a maximum slope of 1:12 (1 inch rise per 12 inches of run, or 0.0833 ratio).

Q2: When would I use a different slope?
A: For residential use, some allow 1:8 (0.125) for short rises. Check local building codes for exceptions.

Q3: How does ramp length affect design?
A: Longer ramps require more space but are safer. They may need landings for every 30 inches of rise.

Q4: What about ramp width requirements?
A: ADA requires minimum 36 inches width. This calculator only determines length based on slope.

Q5: How do I measure the height accurately?
A: Measure vertical distance from lower level to upper level where the ramp will connect.