The Ontario Building Code | Obstructions
3.3.1.22. Obstructions
(1) No obstruction shall be permitted in any occupancythat would restrict the width of a normal means of egressfrom any part of a floor area to less than 750 mm unless an unobstructed alternative means of egressis provided adjacent to, accessible from, and plainly visible from the obstructed means of egress.
In Plain Language
This clause sets out the additional egress requirements specific to Group A, Division 1 assembly occupancies (like theatres), given the large occupant loads and often unfamiliar layout these spaces present to the public.
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.