The Ontario Building Code | Loads on Stairs and Ramps
220.127.116.11. Loads on Stairs and Ramps
(a) 1.9 kPa for stairs and ramps serving a single dwelling unit, and
Note: On July 1, 2017, Clause 18.104.22.168.(1)(a) of Division B of the Regulation is amended by striking out "single dwelling unit" and substituting "houseor an individual dwelling unit". (See: O. Reg. 139/17, s. 85)
(b) 4.8 kPa for other stairs and ramps.