1. What is an ADA Ramp Requirements Calculator?

Definition: This calculator determines the minimum required ramp length based on ADA (Americans with Disabilities Act) standards for a 1:12 maximum slope ratio.

Purpose: It helps architects, builders, and property owners design ADA-compliant ramps for wheelchair accessibility.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Required ramp length (feet)
• \( H \) — Height/rise (feet)

Explanation: ADA standards require a maximum slope of 1:12, meaning for every 1 inch of rise, you need 12 inches (1 foot) of ramp run.

3. Importance of ADA Ramp Compliance

Details: Proper ramp design ensures safe and accessible routes for wheelchair users and others with mobility challenges, while meeting legal requirements.

4. Using the Calculator

Tips: Simply enter the vertical height (rise) that needs to be overcome. The calculator will determine the minimum ramp length required by ADA standards.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum rise before a landing is required?
A: ADA requires a landing every 30 inches of rise. For a 1:12 slope, this means every 30 feet of ramp length.

Q2: Can the slope be steeper than 1:12?
A: Only in existing buildings where space is limited (max 1:10 for 6" rise or 1:8 for 3" rise), but 1:12 is the standard for new construction.

Q3: What about ramp width requirements?
A: ADA requires a minimum clear width of 36 inches between handrails.

Q4: Are handrails always required?
A: Yes, for ramps with a rise greater than 6 inches or horizontal projection greater than 72 inches.

Q5: What's the maximum length between landings?
A: 30 feet of ramp run requires a landing (for 1:12 slope, this equals 30 inches of rise).