London By-law CP-24, s. 4.5.9.1 — Stairs – Interior – Single Dwelling The stair tread rise and run for residential interior single dwelling unit shall not exceed these dimensions
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Stairs – Interior – Single Dwelling The stair tread rise and run for residential interior single dwelling unit shall not exceed these dimensions:
- a) maximum rise 230 mm (9")
- b) minimum tread 230 mm (9")
- c) minimum run 200 mm (8")
- d) if run is less than 240 mm (9½”), a 25 mm (1") nosing is required
- e) existing winders of not more than 3 in 90 degree and not more than 2 sets between floors are permitted and where each tread is not less than 30 degrees and each tread is not greater than 45 degrees
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Related sections
- 4.5.8.2 Handrail – Both Sides
- 4.5.8.3 One Handrail – Central
- 4.5.9.2 Stairs – Residential – Not within The stair tread rise and run for residential stairs not within dwelling unit shall not exceed these dimensions
- 4.5.9.3 Stairs – Non-residential The stair tread rise and run for non-residential stairs shall not exceed these dimensions
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