Part M · England · Free to use
Ramp gradient calculator
Maximum gradient for a ramp flight and the shortest going for a given rise, with landings and the lift and steps triggers.
Approved Document M Volume 2 (2015, including 2024 amendments)
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Part M · Result
1:13.3 gradient
Lengthen the flight to at least 7.9 m or add an intermediate landing.
Check failed- Gradient: Check failedmax 1:15.8 for a 6 m going1:13.3
- Rise of flight: Checks passedmax 500 mm450 mm
- Going of flight: Checks passedmax 10 m6 m
- Shortest compliant going: Calculated resultfor this rise7.9 m
- Surface width: Checks passedmin 1,500 mm1,500 mm
- Steps also required: Calculated resulttotal rise over 300 mmYes
- Lift required instead: Calculated resulttotal rise over 2 mNo
- Landings: 1.2 m top and bottom, 1.5 m intermediate, 1.8 × 1.8 m passing landings on three or more flights (para 1.26).
- Interpolate between the Table 1 limits: 1:14 for a 4 m going, 1:19 for 9 m (Diagram 3).
Clauses this relies on
Source edition and scope
Approved Document M Volume 2 (2015, including 2024 amendments).
This is a preliminary check of the conditions shown. Confirm the edition, project circumstances and any additional requirements with your architect or building control.
A design aid, not legal advice. Checked against the Building Regulations 2010 for England; confirm with building control.