1. What is the Ramp Length Calculation?

The ramp length calculation determines the required length of a ramp based on its height and angle. This is essential for creating accessible and safe inclines for wheelchair users, strollers, and other mobility devices.

2. How Does the Calculator Work?

The calculator uses the trigonometric formula:

Where:

• \( \text{Height} \) — Vertical height difference (ft)
• \( \text{Angle} \) — Incline angle (degrees)
• \( \sin \) — Trigonometric sine function

Explanation: The formula calculates the hypotenuse length of a right triangle where the height is the opposite side and the ramp length is the hypotenuse.

3. Importance of Proper Ramp Length

Details: Proper ramp length is crucial for accessibility compliance, safety, and usability. Steep ramps can be dangerous and difficult to navigate, while properly angled ramps provide safe access for all users.

4. Using the Calculator

Tips: Enter the vertical height in feet and the desired angle in degrees. The angle should typically be between 4.8° (1:12 slope) and 7.1° (1:8 slope) for ADA compliance.

5. Frequently Asked Questions (FAQ)

Q1: What is the recommended angle for accessibility ramps?
A: The ADA recommends a maximum slope of 1:12 (4.8°) for wheelchair ramps. This means for every 1 inch of height, you need 12 inches of ramp length.

Q2: How do I convert degrees to slope ratio?
A: Slope ratio = 1:tan(angle). For example, a 4.8° angle gives approximately a 1:12 slope ratio.

Q3: What's the minimum width for an accessibility ramp?
A: ADA requirements specify a minimum clear width of 36 inches between handrails.

Q4: Do I need handrails on my ramp?
A: Handrails are required on both sides if the ramp rise is greater than 6 inches or the horizontal projection is greater than 72 inches.

Q5: Can this calculator be used for vehicle ramps?
A: Yes, but vehicle ramps often have different angle requirements based on the vehicle's ground clearance and approach angle capabilities.