1. What is a Wheelchair Ramp Angle Calculator?

Definition: This calculator determines the angle of a wheelchair ramp based on its height and length.

Purpose: It helps ensure wheelchair ramps meet accessibility standards and safety requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \theta \) — Ramp angle (degrees)
• \( H \) — Vertical height (feet)
• \( L \) — Horizontal length (feet)

Explanation: The angle is calculated using the inverse tangent (arctangent) of the height-to-length ratio.

3. Importance of Ramp Angle Calculation

Details: Proper ramp angles ensure accessibility, safety, and compliance with ADA guidelines (typically 4.8° maximum or 1:12 slope).

4. Using the Calculator

Tips: Enter the vertical height and horizontal length in feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum recommended ramp angle?
A: ADA recommends a maximum slope of 4.8° (1:12 ratio) for wheelchair ramps.

Q2: How does ramp length affect the angle?
A: Longer ramps create shallower angles, making them easier to navigate.

Q3: What if my calculated angle exceeds recommendations?
A: Increase the ramp length or add switchbacks to reduce the angle.

Q4: Does this account for ramp landings?
A: No, this calculates the running slope only. Landings should be included in ramp design.

Q5: Can I use this for other types of ramps?
A: Yes, but check applicable standards as different ramps (e.g., vehicle) may have different requirements.