Ramp Calculator For Wheelchairs

Ramp Length Formula:

\[ L = \sqrt{rise^2 + (rise \times ratio)^2} \]

Ramp Length (units):

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1. What is a Ramp Calculator For Wheelchairs?

Definition: This calculator computes the required length of a wheelchair ramp based on the vertical rise and the slope ratio.

Purpose: It helps designers, builders, and accessibility planners determine proper ramp dimensions for wheelchair accessibility.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ L = \sqrt{rise^2 + (rise \times ratio)^2} \]

Where:

\( L \) — Ramp length (units)
\( rise \) — Vertical height to overcome (units)
\( ratio \) — Slope ratio (run/rise, unitless)

Explanation: The formula calculates the hypotenuse of a right triangle where the vertical side is the rise and the horizontal side is rise × ratio.

3. Importance of Proper Ramp Calculation

Details: Correct ramp length ensures ADA compliance, wheelchair accessibility, and user safety by maintaining proper slope.

4. Using the Calculator

Tips: Enter the vertical rise height and slope ratio (default 12 for ADA-compliant 1:12 slope). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the standard slope ratio for wheelchair ramps?
A: ADA requires a maximum 1:12 slope ratio (1 unit of rise per 12 units of run).

Q2: How do I measure the rise?
A: Measure the vertical distance from the starting level to the ending level.

Q3: When would I use a different ratio?
A: For residential applications, some jurisdictions allow 1:8 or 1:10 ratios for shorter ramps.

Q4: Does this include landing space?
A: No, ADA requires a 5'×5' landing at top and bottom, and every 30' of ramp length.

Q5: What units should I use?
A: Use consistent units (inches, feet, or meters) for both rise and length.