1. What is Slope Ratio?

Slope Ratio represents the relationship between the horizontal distance (run) and vertical height (rise) of a ramp. It is expressed as a dimensionless ratio showing how much horizontal distance is required for each unit of vertical rise.

2. How Does the Calculator Work?

The calculator uses the slope ratio formula:

Where:

• \( Run \) — Horizontal distance of the ramp
• \( Rise \) — Vertical height of the ramp

Explanation: The slope ratio indicates how gradual or steep a ramp is. A higher ratio means a more gradual slope, while a lower ratio indicates a steeper slope.

3. Importance of Slope Ratio Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal slope ratio for wheelchair ramps?
A: For wheelchair accessibility, a slope ratio of 12:1 (12 units run for 1 unit rise) is commonly recommended, though local building codes may vary.

Q2: How does slope ratio differ from slope percentage?
A: Slope ratio is expressed as run:rise (e.g., 4:1), while slope percentage is (rise/run) × 100%. A 4:1 ratio equals 25% slope.

Q3: What are common slope ratios in construction?
A: Common ratios include 4:1 for gentle slopes, 3:1 for moderate slopes, and 2:1 for steep slopes, depending on the application.

Q4: Can slope ratio be less than 1:1?
A: Yes, but slopes steeper than 1:1 (45 degrees) are generally not considered ramps and may require special safety considerations.

Q5: How is slope ratio used in drainage design?
A: In drainage, slope ratios ensure proper water flow. Typical minimum ratios range from 1:48 to 1:24 depending on the pipe material and application.