1. What is a Ramp Size 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)

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 Calculation

Details: Correct ramp sizing ensures ADA compliance, wheelchair accessibility, and safe use for all individuals.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is a standard slope ratio for ramps?
A: ADA requires 1:12 maximum slope (0.0833 ratio), meaning 1" rise per 12" run.

Q2: How do I convert slope percentage to ratio?
A: Divide percentage by 100 (e.g., 8.33% slope = 0.0833 ratio).

Q3: When would I use a different slope ratio?
A: For temporary ramps or when space constraints exist, but steeper slopes reduce accessibility.

Q4: Does this include landing space?
A: No, add 5' landing space at top and bottom for ADA compliance.

Q5: How does height affect ramp length?
A: Higher elevations require proportionally longer ramps to maintain safe slope.