9.9.4.2 — Fire Separation for Exits

(1) This Article applies to wired glass in doors, and wired glass or glass block in sidelights, where these are installed in fire separations between exit enclosures and floor areas. (2) Except as provided in Sentence (3), the combined area of glazing in doors and sidelights shall not exceed 0.8 m². (3) Where an exit enclosure connects with a floor area through an enclosed vestibule or corridor separated from the floor area by fire separations having not less than a 45 min fire-resistance rating, the glazed areas described in Sentence (1) need not be limited as required in Sentence (2).

(1) Not more than one exit from a floor area is permitted to lead through a lobby. (2) The floor of the lobby referred to in Sentence (1) shall be not more than 4.5 m above grade, and the path of travel through the lobby to the outdoors shall not exceed 15 m. (3) The lobby referred to in Sentence (1) shall conform in all respects to the requirements for exits, except that rooms other than service rooms, storage rooms and rooms of residential or industrial occupancy are permitted to open directly onto such lobby. (4) Except as provided in Sentence (6), an exit is permitted to lead through a lobby referred to in Sentence (1) provided the lobby is not located within an interconnected floor space other than as described in Sentence 3.2.8.2. (6). (5) Passenger elevators are permitted to open onto the lobby referred to in Sentence (1) provided the elevator doors are designed to remain closed except while loading and unloading. (6) An exit that serves a hotel is permitted to lead through a lobby referred to in Sentence (1) provided the lobby is not located within an interconnected floor space. (7) Where the lobby referred to in Sentence (1) and adjacent occupancies that are permitted to open into the lobby are sprinklered, the fire separation between such occupancies and the lobby need not have a fire-resistance rating.