1. What is the Ramp Length Formula?

The Ramp Length formula calculates the required length of a ramp based on the rise height and slope. It is essential for designing accessible ramps that meet safety standards and building codes.

2. How Does the Calculator Work?

The calculator uses the Ramp Length formula:

Where:

• \( RL \) — Ramp Length (m)
• \( RH \) — Rise Height (m)
• \( S \) — Slope (decimal)

Explanation: The formula calculates the horizontal length of a ramp needed to achieve a specific slope for a given vertical rise.

3. Importance of Ramp Length Calculation

Details: Accurate ramp length calculation is crucial for creating accessible pathways that comply with ADA requirements and ensure safe, comfortable use for people with mobility challenges.

4. Using the Calculator

Tips: Enter rise height in meters and slope as a decimal value. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum slope recommended for accessibility ramps?
A: The ADA recommends a maximum slope of 1:12 (8.33%) for wheelchair ramps, which means for every 1 unit of vertical rise, 12 units of horizontal run are required.

Q2: How do I convert slope percentage to decimal?
A: Divide the slope percentage by 100. For example, 8.33% slope becomes 0.0833 as a decimal.

Q3: What are the minimum width requirements for ramps?
A: ADA requires a minimum clear width of 36 inches (91.5 cm) between handrails for wheelchair ramps.

Q4: When are landings required in ramp design?
A: Landings are required every 30 feet (9 meters) of horizontal run, at the top and bottom of each ramp run, and where ramps change direction.

Q5: Are there different slope requirements for different types of ramps?
A: Yes, temporary ramps may have steeper slopes (up to 1:8 or 12.5%), while permanent ramps typically follow the 1:12 standard. Always check local building codes for specific requirements.