1. What is Ramp Slope Percentage?

Ramp slope percentage is a measure of the steepness of a ramp, calculated as the ratio of vertical rise to horizontal run expressed as a percentage. It is commonly used in construction, accessibility design, and engineering to ensure safe and compliant ramp designs.

2. How Does the Calculator Work?

The calculator uses the slope percentage formula:

Where:

• \( Rise \) — Vertical height (m or ft)
• \( Run \) — Horizontal distance (m or ft)

Explanation: The formula calculates the percentage slope by dividing the vertical rise by the horizontal run and multiplying by 100 to convert to percentage.

3. Importance of Slope Calculation

Details: Accurate slope calculation is essential for designing accessible ramps that meet building codes, ensuring wheelchair accessibility, and maintaining safety standards in construction projects.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run in consistent units (both meters or both feet). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum slope for wheelchair ramps?
A: According to ADA standards, the maximum slope for wheelchair ramps is 8.33% (1:12 ratio) for commercial and public buildings.

Q2: How do I convert slope percentage to degrees?
A: Slope in degrees = arctan(slope percentage / 100). For example, a 10% slope equals approximately 5.71 degrees.

Q3: What is a typical slope for vehicle ramps?
A: Vehicle ramps typically range from 10% to 20% slope, with 15% being common for parking garages and driveways.

Q4: Can I use different units for rise and run?
A: No, both rise and run must be in the same units (both meters or both feet) for accurate percentage calculation.

Q5: What slope is considered steep for walking?
A: Slopes above 15% are generally considered steep for comfortable walking, while slopes above 30% may require steps or special considerations.