The Ontario Building Code | Risers for Stairs
3.3.2.13. Risers for Stairs
(1) In a Group A, Division 2 occupancy used for the serving of food and beverages, an interior flight of stairs with fewer than three risers is permitted provided it,
(a) is not less than 900 mm wide,
(b) is illuminated at all times that occupants are on the premises, and
(c) has a handrail on each side.
In Plain Language
This clause sets sprinkler and fire alarm coordination requirements specific to care, treatment, and detention occupancies, given the heightened reliance on automatic systems where occupants may not self-evacuate quickly.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.