The Ontario Building Code | Welding and Cutting
188.8.131.52. Welding and Cutting
(1) Except as provided in Sentence (2), welding and cutting operations shall be located in a room,
(a) separated from the remainder of the building by a fire separation having a fire-resistance rating not less than 1 h, or
(b) protected by an automatic fire extinguishing system.
(2) Sentence (1) does not apply to an industrial occupancy where the welding and cutting operations do not present a fire or explosion hazard to adjacent areas.
3.3.2. Assembly Occupancy