1. What is Ramp Slope Ratio?

The Ramp Slope Ratio (SR) represents the steepness of a ramp, calculated as the ratio of vertical rise (R) to horizontal run (L). It is commonly used in construction, engineering, and accessibility design to determine appropriate incline angles.

2. How Does the Calculator Work?

The calculator uses the slope ratio formula:

Where:

• \( SR \) — Slope Ratio (dimensionless)
• \( R \) — Vertical rise measurement
• \( L \) — Horizontal run measurement

Explanation: The slope ratio indicates how many units the ramp rises for each unit of horizontal distance. A higher ratio indicates a steeper slope.

3. Importance of Slope Ratio Calculation

Details: Accurate slope ratio calculation is crucial for ensuring ramp safety, compliance with accessibility standards, proper drainage design, and structural stability in various construction and engineering applications.

4. Using the Calculator

Tips: Enter both rise and run values in the same units (inches, feet, meters, etc.). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope ratio for wheelchair ramps?
A: ADA guidelines recommend a maximum slope ratio of 1:12 (1 unit rise per 12 units run) for wheelchair accessibility.

Q2: How does slope ratio relate to angle?
A: The angle can be calculated as arctan(SR). For example, a slope ratio of 1:12 corresponds to approximately 4.76 degrees.

Q3: What units should I use for rise and run?
A: Use consistent units (both in inches, both in feet, etc.). The ratio will be the same regardless of the unit system.

Q4: Can slope ratio be greater than 1?
A: Yes, a slope ratio greater than 1 indicates a very steep incline where the vertical rise exceeds the horizontal run.

Q5: How is slope ratio used in construction?
A: Slope ratio is used for ramp design, roof pitch calculation, road grading, drainage systems, and ensuring compliance with building codes and accessibility standards.