1. What is Ramp Ratio?

Ramp ratio represents the relationship between vertical rise and horizontal run of a slope. In Australia, this measurement is crucial for accessibility compliance and construction standards.

2. How Does the Calculator Work?

The calculator uses the ramp ratio formula:

Where:

• \( Rise \) — Vertical height difference (unitless)
• \( Run \) — Horizontal distance (unitless)

Explanation: The ratio is typically expressed as 1:X, where X represents how many units of run correspond to 1 unit of rise.

3. Importance of Ramp Ratio Calculation

Details: Proper ramp ratios are essential for accessibility compliance, safety standards, and ensuring wheelchair users and people with mobility impairments can navigate slopes comfortably and safely.

4. Using the Calculator

Tips: Enter both rise and run values in the same units (e.g., centimeters, meters, or inches). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the recommended ramp ratio in Australia?
A: The Australian standard recommends a maximum slope of 1:14 for wheelchair access ramps, meaning for every 1 unit of rise, there should be at least 14 units of run.

Q2: Are there different requirements for different types of ramps?
A: Yes, requirements vary based on ramp usage, length, and whether it's for public access, residential use, or temporary installations.

Q3: Why is the 1:14 ratio important?
A: This ratio provides a slope that is manageable for most wheelchair users without requiring excessive effort or posing safety risks.

Q4: What about handrails and landings?
A: Australian standards also specify requirements for handrails, landing platforms, and edge protection based on ramp length and height.

Q5: Where can I find the official Australian standards for ramps?
A: The Disability (Access to Premises—Buildings) Standards 2010 and AS 1428.1-2009 provide detailed specifications for ramp design in Australia.