1. What is Ramp Length Calculation?

Ramp length calculation determines the required length of a ramp based on the vertical rise and the desired slope percentage. This is essential for designing accessible and safe ramps for wheelchair users, strollers, and general accessibility.

2. How Does the Calculator Work?

The calculator uses the ramp length formula:

Where:

• \( Rise \) — Vertical height difference (feet)
• \( Slope \% \) — Slope percentage (%)
• \( Ramp Length \) — Required ramp length (feet)

Explanation: The formula converts the slope percentage into a ratio and calculates the horizontal distance needed to achieve the specified rise at that slope.

3. Importance of Ramp Length Calculation

Details: Proper ramp length calculation ensures compliance with accessibility standards (ADA requirements), provides safe inclines for users, prevents accidents, and meets building code regulations.

4. Using the Calculator

Tips: Enter the vertical rise in feet and the desired slope percentage. Common slope percentages for accessibility ramps range from 5% to 8.33% (1:12 slope). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum recommended slope for accessibility ramps?
A: The ADA recommends a maximum slope of 8.33% (1:12 ratio) for wheelchair ramps, meaning 1 foot of rise requires 12 feet of ramp length.

Q2: How do I convert slope percentage to ratio?
A: Slope percentage = (Rise / Run) × 100. For example, a 1:12 slope equals 8.33% (1÷12×100).

Q3: What are common slope percentages for different applications?
A: Wheelchair ramps: 5-8.33%, Vehicle ramps: 10-20%, Pedestrian ramps: 5-10%, Industrial ramps: up to 15%.

Q4: Do I need landings in long ramps?
A: Yes, ADA requires landings every 30 feet of ramp length and at the top and bottom of each ramp run for rest and turning.

Q5: How does ramp length affect usability?
A: Longer ramps with gentler slopes are easier to use but require more space. Steeper slopes require less space but are more difficult to navigate.