1. What is Ramp Ratio?

Ramp ratio is the relationship between the horizontal distance (run) and vertical height (rise) of a ramp. In Australia, the maximum allowable ratio for wheelchair access is 1:14, meaning for every 1 meter of rise, there must be at least 14 meters of run.

2. How Does the Calculator Work?

The calculator uses the ramp ratio formula:

Where:

• \( Run \) — Horizontal distance of the ramp (meters)
• \( Rise \) — Vertical height of the ramp (meters)
• \( Ratio \) — Dimensionless ratio value

Explanation: The ratio indicates the steepness of the ramp. Higher ratios mean gentler slopes, while lower ratios indicate steeper ramps.

3. Australian Standards for Ramps

Details: According to Australian standards (AS 1428.1), the maximum gradient for wheelchair ramps is 1:14. This ensures safe and accessible movement for people with mobility impairments.

4. Using the Calculator

Tips: Enter the run and rise measurements in meters. The calculator will determine the ratio and check compliance with Australian standards. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum ramp ratio in Australia?
A: The maximum allowable ratio for wheelchair access is 1:14 (approximately 4.1° slope).

Q2: Are there different requirements for different ramp types?
A: Yes, shorter ramps may have steeper gradients, but 1:14 is the standard for main access routes.

Q3: What about landings and handrails?
A: Australian standards also require appropriate landings every 9 meters and handrails on both sides for ramps steeper than 1:20.

Q4: How accurate do measurements need to be?
A: Measurements should be precise as small variations can significantly affect accessibility compliance.

Q5: Can this calculator be used for commercial projects?
A: While useful for preliminary calculations, always consult with qualified professionals and local building authorities for official compliance.