(1)
Except as provided in Sentence (2), welding and cutting operations shall be carried out 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) shall not apply to industrial occupancies where the welding and cutting operations do not present a fire or explosion hazard to adjacent areas.