| 9.9.4. |
Fire Protection of Exits |
| 9.9.4.1. |
Application
- Except as provided in Articles 9.9.4.4. and 9.9.4.6., this Subsection applies to the fire protection of all exits except exits serving not more than one dwelling unit.
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| 9.9.4.2. |
Fire Separations for Exits
- Except as provided in Sentences (2) and (5) and Article 9.9.8.5., every exit other than an exterior doorway shall be separated from each adjacent floor area or from another exit
- where there is a floor assembly above the floor area, by a fire separation having a fire-resistance rating not less than that required for the floor assembly above the floor area (see Article 9.10.9.10.), and
- where there is no floor assembly above the floor area, by a fire separation having a fire-resistance rating not less than the greater of
- that required by Subsection 9.10.8. for the floor assembly below, or
- 45 min.
- Where an exit is located in a house with a secondary suite including their common spaces, the exit shall be protected by a continuous smoke-tight barrier of not less than 12.7 mm thick gypsum board installed on
- both sides of walls separating the exit from the remainder of the building, and
- the underside of floor-ceiling framing separating the exit from the remainder of the building. (See Sentence 9.10.9.3.(2) for closures.)
- 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.
- 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.
- The requirements in Sentences (1) and (2) do not apply to an exterior exit passageway provided the passageway has not less than 50% of its exterior sides open to the outdoors and is served by an exit stair at each end of the passageway.
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| 9.9.4.3. |
Wired Glass or Glass Block
(See Note A-3.1.8.19.(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.
- Except as provided in Sentence (3), the combined area of glazing in doors and sidelights shall not exceed 0.8 m2.
- 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).
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| 9.9.4.4. |
Openings Near Unenclosed Exterior Exit Stairs and Ramps
- Unprotected openings in 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., where
- an unenclosed exterior exit stair or ramp provides the only means of egress from a suite and is exposed to fire from unprotected openings in the exterior walls of
- another fire compartment, or
- another dwelling unit, ancillary space or common space in a house with a secondary suite, and
- unprotected 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.
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| 9.9.4.5. |
Openings in Exterior Walls of Exits
- Either openings in 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
- 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
- the openings in the exterior walls of the building are within 3 m horizontally and less than 2 m above the openings in the exterior walls of the exit. (See Note A-9.9.4.5.(1).)
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| 9.9.4.6. |
Openings Near Exit Doors
- Unprotected openings 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., where
- an exterior exit door
- in one fire compartment is within 3 m horizontally of an unprotected opening serving another fire compartment, or
- in one dwelling unit, ancillary space or common space in a house with a secondary suite is within 3 m horizontally of the unprotected openings serving another dwelling unit, ancillary space or common space in a house with a secondary suite, and
- the exterior walls of the fire compartments, dwelling units, ancillary spaces and common spaces in a house with a secondary suite referred to in Clause (a) intersect at an exterior angle of less than 135°.
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| 9.9.4.7. |
Stairways in 2 Storey, Group D or E Buildings
- Where a suite of Group D or E occupancy is located partly on the first storey and partly on the second storey, stairways serving the second storey of that suite need not be constructed as exit stairs provided,
- the building is not greater than 2 storeys in building height,
- the suite is separated from other occupancies by at least a 45 min fire separation,
- the area occupied by the suite is not greater than 100 m2 per storey,
- the maximum travel distance from any point in the suite to an exterior exit is not greater than 25 m,
- the floor assemblies have a fire-resistance rating of not less than 45 min or are of noncombustible construction, and
- the basement and first storey are separated by a fire separation having a fire-resistance rating of not less than 45 min.
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