Technical Booklet H Stairs Ramps Guarding and Protection from Impact·Page 23·Table 3.1
Rise and going dimensions by stair category
Table specifying minimum and maximum rise and going dimensions for private stairs, common stairs in blocks of dwellings, and stairs in other buildings, with a note that multiple categories require the more stringent standard.
Table 3.1 Rise and going
Category | Rise minimum (mm) | Rise maximum (mm) | Going minimum (mm) | Going maximum (mm)
Private stair | 75 | 220* | 220 | —
A common stair in a block of dwellings | 75 | 170 | 250 | —
A stair in any building (other than a private stair or a common stair in a block of dwellings) | 150 | 170 | 250 | —
Note: A stair within more than one category should be constructed to the more onerous standard.
* see also paragraph 3.12.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet H - Stairs Ramps Guarding and Protection from Impact.pdf