1. What is the Ramp Rise Formula?

The ramp rise formula calculates the vertical rise of a ramp based on its length and slope percentage. This is essential for designing accessible ramps that meet building codes and ADA requirements.

2. How Does the Calculator Work?

The calculator uses the ramp rise formula:

Where:

• \( R \) — Ramp rise (inches)
• \( L \) — Ramp length (inches)
• \( S \) — Slope percentage (%)

Explanation: The formula converts the slope percentage to a decimal value and multiplies it by the ramp length to determine the vertical rise.

3. Importance of Ramp Measurements

Details: Proper ramp measurements are crucial for accessibility compliance, safety, and usability. ADA guidelines typically require a maximum slope of 1:12 (8.33%) for wheelchair ramps.

4. Using the Calculator

Tips: Enter ramp length in inches and slope percentage. All values must be valid positive numbers. The calculator will compute the vertical rise of the ramp.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum slope allowed for ADA compliant ramps?
A: The maximum slope for ADA compliant ramps is 1:12, which equals 8.33% slope.

Q2: How do I measure ramp length?
A: Measure the horizontal distance from the bottom of the ramp to the top, not the diagonal surface length.

Q3: What is considered a comfortable slope for wheelchair users?
A: While 1:12 is the maximum allowed, a slope of 1:16 or 1:20 is more comfortable and easier to navigate for most wheelchair users.

Q4: Do I need handrails for my ramp?
A: ADA requirements mandate handrails on both sides of ramps with a rise greater than 6 inches or a horizontal projection greater than 72 inches.

Q5: How does ramp slope affect usability?
A: Steeper slopes require more effort to ascend and can be dangerous to descend. Proper slope calculation ensures safe and accessible ramp design.