1. What is Slope Per Foot?

Slope per foot is a measurement that expresses the vertical change (rise) per unit of horizontal distance (run). It's commonly used in construction, landscaping, and engineering to describe the steepness or gradient of surfaces.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• Rise — Vertical change (in inches)
• Run — Horizontal distance (in feet)

Explanation: The formula calculates how many inches of vertical change occur for every foot of horizontal distance.

3. Importance of Slope Calculation

Details: Accurate slope calculation is crucial for proper drainage, structural stability, accessibility compliance, and ensuring water flows away from foundations in construction projects.

4. Using the Calculator

Tips: Enter rise in inches and run in feet. Both values must be positive numbers, with run greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope for drainage?
A: For proper drainage, a minimum slope of 1/4 inch per foot is typically recommended for surfaces like patios and walkways.

Q2: How do I convert slope per foot to percentage?
A: Multiply the slope per foot by 100 to get the percentage grade. For example, 0.5 inches/foot = 4.17% slope.

Q3: What's the maximum slope for wheelchair accessibility?
A: ADA guidelines recommend a maximum slope of 1:12 (1 inch rise per 12 inches run) for ramps, which equals 1 inch per foot.

Q4: When is slope expressed in inches per foot vs. ratio?
A: Inches per foot is commonly used in construction, while ratio format (e.g., 1:12) is often used in architectural drawings and specifications.

Q5: How accurate does slope measurement need to be?
A: For most construction applications, slope measurements should be accurate to within 1/8 inch per foot to ensure proper function and compliance.