Question 1

What is the maximum gradient for a wheelchair ramp in the UK?

Accepted Answer

Under Approved Document M and BS 8300:2018, the maximum gradient for a permanent wheelchair ramp is 1:12 (8.3%). However, the preferred gradient is 1:15 (6.7%) as this is easier for wheelchair users to navigate independently. For ramps with a going over 10m, a gradient no steeper than 1:20 is recommended.

Question 2

How often do I need landings on a wheelchair ramp?

Accepted Answer

Intermediate landings are required whenever the per-flight rise cap is reached. Per AD M Vol 2 Table 2 / BS 8300-2:2018 Table 8, this cap depends on the chosen gradient: 1:12 allows 166mm rise per flight, 1:15 allows 333mm, and 1:20 allows 500mm. Each landing must be at least 1200mm long (clear of any door swing) and the full width of the ramp (minimum 1500mm). Top and bottom landings are always required regardless of ramp length.

Question 3

What width should a wheelchair ramp be?

Accepted Answer

Part M requires a minimum clear width of 1200mm for a wheelchair ramp. However, BS 8300 recommends 1500mm to allow unassisted wheelchair access and to provide space for a wheelchair user and a walking person to pass. Where two-way wheelchair traffic is expected, 1800mm is recommended.

Question 4

Do wheelchair ramps need handrails?

Accepted Answer

Yes, ramps with a rise greater than 300mm require handrails on both sides at a height of 900-1100mm. Handrails must extend at least 300mm beyond the top and bottom of each flight. They should be 40-50mm in diameter, have a smooth finish, and be fixed with at least 50mm clearance from any wall.

Question 5

Can I use a temporary ramp instead of a permanent one?

Accepted Answer

Temporary or portable ramps can be used for existing buildings where a permanent ramp is not feasible. They must still meet a maximum gradient of 1:12 and be stable, slip-resistant, and have raised edges. However, for new buildings, Part M requires permanent ramped access. Temporary ramps are not considered compliant for Building Regulations approval on new-build projects.

Wheelchair Ramp Calculator - Part M & BS 8300 Gradient & Length

How We Calculate This

Gradient calculation

Landing requirements

Handrail requirements

Frequently Asked Questions

Related Calculators

Accessible Parking Calculator

Accessible WC Calculator

Corridor Width Calculator

Door Width Calculator

Ramp Calculator

Part M Access Calculator