9.9.4.

(1) Except as provided in Article 9.9.4.4., this Subsection applies to the fire protection of all exits except exits serving a single dwelling unit.

(1) Except as provided in Sentence (5) and Article 9.9.8.5., every exit other than an exit doorway, shall be separated from each adjacent floor area or from another exit by a fire separation having a fire-resistance rating not less than that required for the floor assembly above the floor area.

(2) Where there is no floor assembly above, the fire-resistance rating required in Sentence (1) shall not be less than that required by Subsection 9.10.8. for the floor assembly below, but in no case shall the fire-resistance rating be less than 45 min.

(3) A fire separation common to 2 exits shall be smoke-tight and not be pierced by doorways, duct work, piping or any other opening that may affect the continuity of the separation.

(4) A fire separation that separates an exit from the remainder of the building shall have no openings except those for electrical wiring, noncombustible conduit and noncombustible piping that serve only the exit and for standpipes, sprinkler piping, exit doorways and wired glass and glass block permitted in Article 9.9.4.3.

(5) The requirements in Sentence (1) do not apply to an exterior exit passageway provided the passageway has at least 50 per cent of its exterior sides open to the outdoors and is served by an exit stair at each end of the passageway.

(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) Where an unenclosed exterior exit stair or ramp provides the only means of egress from a suite, and is exposed to fire from openings in the exterior walls of another fire compartment, the openings in the exterior walls of the building shall be protected with wired glass in fixed steel frames or glass block conforming to Articles 9.10.13.5. and 9.10.13.7. when the openings in the exterior walls of the building are within 3 m horizontally and less than 10 m below or less than 5 m above the exit stair or ramp.

(1) Either openings in the exterior walls of an exit or openings in adjacent exterior walls of the building the exit serves shall be protected with wired glass in fixed steel frames or glass block installed in accordance with Articles 9.10.13.5. and 9.10.13.7., where,

(a) the exit enclosure has exterior walls that intersect the exterior walls of the building at an angle of less than 135° measured on the outside of the building, and

(b) the openings in the exterior walls of the building are within 3 m horizontally and less than 2 000 mm above the openings in the exterior walls of the exit.

(1) This Article applies to,

(a) exit doors serving other than single dwelling units, and

(b) exit doors serving single dwelling units where there is no second and separate exit from the dwelling unit.

(2) Where an exterior exit door described in Sentence (1) in one fire compartment is within 3 m horizontally of an unprotected opening in another fire compartment and the exterior walls of these fire compartments intersect at an exterior angle of less than 135°, the opening shall be protected with wired glass in fixed steel frames or glass block conforming to Articles 9.10.13.5. and 9.10.13.7. or with a rated closure conforming to Table 9.10.13.1.v1 with respect to the rating of the fire separation between the two compartments.

(1) Notwithstanding the requirements of Sentences 9.9.4.2.(1), 9.9.8.2.(1) and Article 9.10.9.5., where a suite of Group D or E occupancy is located partly on the first storey and partly on the second storey or partly on the second storey and partly on the third storey, stairways serving that suite need not be constructed as exit stairs provided,

(a) the building is not greater than 3 storeys in building height,

(b) the suite is separated from other occupancies by at least a 45 min fire separation,

(c) the area occupied by the suite is not greater than 100 m² per storey, other than the exit level storey,

(d) the maximum travel distance from any point in the suite to an exterior exit is not greater than 25 m,

(e) the floor assemblies have a fire-resistance rating of not less than 45 min or are of noncombustible construction,

(f) the basement and first storey are separated by a fire separation having a fire-resistance rating of not less than 45 min, and

(g) a smoke alarm is installed on each floor of the suite, including the basement, in accordance with Subsection 9.10.19.

(2) The requirements of Article 9.10.12.1., for separation of exterior openings, do not apply to an occupancy conforming with Sentence (1).