Ramp Length Formula:
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Definition: This calculator determines the required length of a wheelchair ramp based on the height to be overcome, following Australia's 1:14 slope standard.
Purpose: It helps builders, architects, and homeowners design accessible ramps that comply with Australian accessibility standards.
The calculator uses the formula:
Where:
Explanation: Australian standards require a 1:14 gradient for wheelchair ramps, meaning for every 1 meter of height, you need 14 meters of ramp length.
Details: Correct ramp length ensures accessibility compliance, safety for wheelchair users, and avoids excessive steepness that could be dangerous.
Tips: Simply enter the height difference in meters that the ramp needs to overcome. The calculator will determine the minimum required length.
Q1: Why 1:14 ratio in Australia?
A: This is the maximum slope allowed for wheelchair ramps under Australian accessibility standards (AS 1428.1).
Q2: What if my space is limited?
A: For heights over 190mm, you may need to include landings and switchbacks to maintain the proper slope within limited space.
Q3: Are there exceptions to the 1:14 rule?
A: Temporary ramps may use 1:8 for short rises (max 190mm), but permanent installations should follow 1:14.
Q4: Does this include landing requirements?
A: No, this calculates only the sloped portion. Add appropriate landing space at top, bottom, and any turns (min 1200mm square).
Q5: What about handrails and edge protection?
A: All ramps require handrails on both sides (865-1000mm height) and edge protection where there's a drop-off.