Wheelchair Ramp Length Calculator

Ramp Length Formula:

\[ L = \text{rise} \times 12 \text{ (for 1:12 slope)} \]

Ramp Length (feet):

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1. What is a Wheelchair Ramp Length Calculator?

Definition: This calculator determines the required length for a wheelchair ramp based on the vertical rise and desired slope ratio.

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:

\[ L = \frac{\text{rise} \times \text{slope ratio}}{12} \]

Where:

\( L \) — Ramp length (feet)
rise — Vertical height (inches)
slope ratio — Rise:run ratio (e.g., 1:12 = 12)

Explanation: For every 1 inch of rise, the ADA requires 12 inches of ramp run (1:12 slope).

3. Importance of Proper Ramp Length

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

4. Using the Calculator

Tips: Enter the vertical rise in inches and select the desired slope ratio. The default 1:12 ratio meets ADA requirements.

5. Frequently Asked Questions (FAQ)

Q1: What is the standard slope for wheelchair ramps?
A: ADA requires 1:12 slope (1 inch rise per 12 inches of run) for commercial ramps.

Q2: When would I use a gentler slope?
A: For residential use or when space allows, gentler slopes (1:16 or 1:20) are easier to navigate.

Q3: What's the maximum rise before a landing is required?
A: ADA requires a landing every 30 inches of rise (30 feet of ramp at 1:12 slope).

Q4: How do I measure the rise?
A: Measure the vertical distance from the ground to the top of the entry point.

Q5: Does this calculator account for switchback ramps?
A: No, it calculates straight-run length only. For switchbacks, calculate each segment separately.