1. What is Slope Ratio?

Slope ratio is a fundamental concept in construction and excavation that represents the steepness of a slope. It is expressed as the ratio of vertical change (rise) to horizontal change (run), typically written as rise:run or as a simplified ratio.

2. How Does the Calculator Work?

The calculator uses the slope ratio formula:

Where:

• \( rise \) — Vertical change/distance (meters, feet, or other units)
• \( run \) — Horizontal change/distance (meters, feet, or other units)

Explanation: The slope ratio indicates how much vertical elevation changes per unit of horizontal distance. For example, a 1:4 ratio means 1 unit of rise for every 4 units of run.

3. Importance of Slope Calculation in Construction

Details: Accurate slope calculation is crucial for excavation safety, proper drainage, structural stability, and compliance with building codes. It helps prevent landslides, erosion, and structural failures.

4. Using the Calculator

Tips: Enter both rise and run values in the same units (meters, feet, etc.). Both values must be positive numbers greater than zero. The calculator will provide the slope ratio in rise:run format.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope ratio for excavation?
A: Common slope ratios range from 1:1 (steep) to 1:4 (gentle), depending on soil type and safety requirements.

Q2: How do I convert slope ratio to percentage?
A: Multiply the ratio by 100. For example, 1:4 ratio = 0.25 = 25% slope.

Q3: What's the difference between slope ratio and slope angle?
A: Slope ratio is rise:run, while slope angle is measured in degrees from horizontal. They are related but different measurements.

Q4: When is a steeper slope ratio acceptable?
A: Steeper slopes may be acceptable in stable rock formations or with proper shoring and engineering controls.

Q5: How does soil type affect slope ratio?
A: Cohesive soils can typically support steeper slopes than loose, sandy soils which require gentler slopes for stability.