1. What is the Disabled Ramp Gradient Calculator?

The Disabled Ramp Gradient Calculator determines the slope percentage of wheelchair ramps to ensure compliance with accessibility standards. It calculates whether a ramp meets the maximum allowable gradient of 1:20 (5%) as per accessibility guidelines.

2. How Does the Calculator Work?

The calculator uses the ramp gradient formula:

Where:

• \( Rise \) — Vertical height change (meters)
• \( Run \) — Horizontal length (meters)
• \( Gradient \% \) — Slope percentage

Accessibility Standard: Maximum allowable gradient is 1:20 ratio, which equals 5% slope for wheelchair accessibility.

3. Importance of Ramp Gradient Calculation

Details: Proper ramp gradient is crucial for wheelchair users, people with mobility impairments, and compliance with building codes and accessibility regulations worldwide.

4. Using the Calculator

Tips: Enter rise (vertical height) and run (horizontal length) in meters. Both values must be positive numbers. The calculator will determine the gradient percentage and compliance status.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum allowable ramp gradient?
A: The maximum gradient for wheelchair ramps is 1:20 (5%) according to most accessibility standards including ADA and building codes.

Q2: What if my ramp exceeds 5% gradient?
A: Ramps steeper than 5% may require additional safety features, landings, or reconsideration of design to ensure accessibility and safety.

Q3: Are there exceptions for steeper gradients?
A: In some cases, existing buildings may allow up to 1:12 (8.33%) for short distances, but 1:20 is the preferred standard for new construction.

Q4: What other factors affect ramp accessibility?
A: Besides gradient, consider ramp width (minimum 36 inches), handrails, landing platforms, surface texture, and edge protection.

Q5: How do I measure rise and run accurately?
A: Measure rise vertically from lowest to highest point, and run horizontally along the ramp's length. Use precise measuring tools for accuracy.