The Ontario Building Code | Height over Stairs

9.8.2.2. Height over Stairs

(1) The clear height over stairs shall be,

(a) measured vertically, over the clear width of the stair, from a straight line tangent to the tread and landing nosings to the lowest point above, and

(b) not less than,

(i) 1 950 mm for stairs serving a single dwelling unit, and

(ii) 2 050 mm for stairs not serving a single dwelling unit.

Note: On July 1, 2017, Clause 9.8.2.2.(1)(b) of Division B of the Regulation is revoked and the following substituted: (See: O. Reg. 139/17, s. 76)

(b) not less than,

(i) 1 950 mm for stairs serving a house or an individual dwelling unit, and

(ii) 2 050 mm for stairs not serving a house or an individual dwelling unit.

9.8.3. Stair Configurations