1. What is a Wheelchair Ramp Calculator?

Definition: This calculator determines the required length of a wheelchair ramp based on the vertical rise it needs to overcome.

Purpose: It helps ensure wheelchair ramps meet accessibility standards and provide safe, comfortable access.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Length of ramp (feet)
• \( \text{rise} \) — Vertical height to overcome (feet)

Explanation: The formula follows the ADA guideline of 1 foot of ramp length for every 1 inch of rise (12:1 slope ratio).

3. Importance of Proper Ramp Calculation

Details: Correct ramp length ensures ADA compliance, safety for wheelchair users, and proper accessibility.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 12?
A: This converts the rise in feet to inches (1 foot = 12 inches) and maintains the 1:12 slope ratio required by ADA standards.

Q2: What's the maximum rise before a landing is required?
A: ADA requires a landing for every 30 inches of rise. For our calculation, that would be 30 feet of ramp length.

Q3: Can I use a steeper slope?
A: The 1:12 ratio is ADA standard. Some residential ramps may use 1:10 or 1:8 for limited space, but these are harder to navigate.

Q4: Does this include landings?
A: No, you must add landing space (minimum 5 feet) at the top and bottom, and every 30 feet of run.

Q5: How do I measure the rise?
A: Measure the vertical distance from the lower level to the upper level where the ramp will be installed.