1. What is a Disabled Ramp Gradient Calculator?

Definition: This calculator determines the gradient (slope) of a disabled access ramp based on its height and length.

Purpose: It helps architects, builders, and accessibility planners ensure ramps meet ADA and other accessibility standards.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( G \) — Ramp gradient (unitless ratio)
• \( H \) — Height difference (feet)
• \( L \) — Ramp length (feet)

Explanation: The height is divided by the length to determine the slope ratio. For accessibility, this is typically expressed as a percentage (multiply by 100).

3. Importance of Ramp Gradient Calculation

Details: Proper gradient calculation ensures ramps are safe and accessible for wheelchair users and others with mobility challenges.

4. Using the Calculator

Tips: Enter the height difference and ramp length in feet. Both values must be > 0. The result is a unitless ratio (for percentage, multiply by 100).

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum recommended gradient for disabled ramps?
A: ADA recommends 1:12 (8.33%) maximum for most ramps, with 1:20 (5%) preferred where space allows.

Q2: How do I convert the gradient to percentage?
A: Multiply the result by 100 (e.g., 0.0833 × 100 = 8.33%).

Q3: Does this account for landings?
A: No, this calculates the running slope only. Landings should be included in ramp design separately.

Q4: What if my ramp has multiple segments?
A: Calculate each segment separately, ensuring none exceeds maximum gradient requirements.

Q5: How does this relate to building codes?
A: Always check local building codes as requirements may vary beyond ADA standards.