Ramp Length Formula (UK Standards):
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Definition: This calculator determines the minimum required ramp length based on UK building regulations (Part M) for accessible design.
Purpose: It helps architects, builders, and property owners comply with UK accessibility standards for wheelchair ramps.
The calculator uses the formula:
Where:
Explanation: UK standards (Part M) require a minimum 1:12 gradient for ramps up to 2m height difference, meaning for every 1m of height, you need 12m of ramp length.
Details: Correct ramp length ensures accessibility for wheelchair users and compliance with UK building regulations, preventing excessively steep ramps 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: Is 1:12 the only permitted gradient in the UK?
A: For public buildings, 1:12 is the maximum gradient for ramps up to 2m height. For private dwellings, 1:15 is recommended where space allows.
Q2: What about landings?
A: This calculator provides the sloped length only. Remember to add level landings (minimum 1.2m long) at top, bottom, and every 10m of ramp length.
Q3: When can I use a steeper gradient?
A: Only for existing buildings where space is extremely limited (max 1:10 for rises ≤ 0.5m), but 1:12 is strongly preferred.
Q4: Does this apply to all ramps?
A: This is for wheelchair access ramps. Different standards may apply for vehicle ramps or other specialized applications.
Q5: What about handrails and width?
A: UK standards also require handrails on both sides (850-1000mm height) and minimum 1500mm clear width for public buildings.