1. What is a Wheelchair Ramp Length Calculator?

Definition: This calculator determines the minimum required length for a wheelchair ramp based on the height that needs to be overcome and ADA slope requirements.

Purpose: It helps ensure wheelchair ramps meet accessibility standards by maintaining the proper slope ratio.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Ramp length (feet)
• \( h \) — Height to overcome (feet)
• \( \frac{1}{12} \) — ADA slope requirement (1:12 ratio)

Explanation: For every 1 foot of vertical rise, the ramp must extend at least 12 feet horizontally to meet ADA accessibility standards.

3. Importance of Proper Ramp Length

Details: Correct ramp length ensures safe and comfortable wheelchair access, prevents excessive slope that could be dangerous, and complies with legal accessibility requirements.

4. Using the Calculator

Tips: Simply enter the vertical height that needs to be overcome in feet. The calculator will determine the minimum ramp length required.

5. Frequently Asked Questions (FAQ)

Q1: What is the ADA slope requirement?
A: The Americans with Disabilities Act requires a maximum slope of 1:12 (1 inch of rise per 12 inches of run).

Q2: Can I use a steeper slope than 1:12?
A: Only for limited circumstances - 1:8 for existing sites with space constraints, and 1:10 for very short rises (6 inches or less).

Q3: Does this include landing space?
A: No, ADA requires a 5'x5' landing at the top, bottom, and every 30 feet of horizontal run.

Q4: What about handrails?
A: Ramps with a rise greater than 6" or horizontal projection greater than 72" require handrails on both sides.

Q5: How does this apply to modular ramp systems?
A: Modular ramps must follow the same slope requirements - this calculation gives you the minimum length needed.