3.3.1.4. Public Corridor Separations (1) Except as otherwise required by this Part or permitted by Sentences (2) to (7), a public corridor shall be separated from the remainder of the building by a fire separation having a fire-resistance rating not less than 1 h. (2) The fire-resistance rating of a fire separation between a public corridor and the remainder of a floor area is permitted to be less than 1 h but not less than 45 min provided the fire-resistance rating required by Subsection 3.2.2. is permitted to be less than 1 h for (a) the floor assembly above the floor area, or (b) the floor assembly below the floor area, if there is no floor assembly above. (3) If a floor area is sprinklered, no fire-resistance rating is required for a fire separation between a public corridor and the remainder of the floor area provided the corridor does not serve a care or detention occupancy or a residential occupancy. (4) If a floor area is sprinklered, no fire separation is required between a public corridor and the remainder of the floor area provided the public corridor (a) is more than 5 m in unobstructed width, and (b) does not serve (i) a care or detention occupancy, or (ii) a residential occupancy. (5) If a floor area is sprinklered, no fire separation is required between a room or a suite and a public corridor that serves it provided the public corridor complies with Sentence 3.3.1.9.(6). (6) A floor assembly of a public corridor above a crawl space that conforms to Sentence 3.2.2.9.(2) is not required to be a fire separation. (7) If a floor area is sprinklered, no fire separation is required between a public corridor and a room containing water closets and lavatories provided the room and the public corridor are separated from the remainder of the floor area by a fire separation that has a fire-resistance rating not less than that required between the public corridor and the remainder of the floor area. (8) The sprinkler system in Sentences (3), (4), (5) and (7) shall be electrically supervised in conformance with Sentence 3.2.4.9.(2) and, upon operation, shall cause a signal to be transmitted to the fire department in conformance with Sentence 3.2.4.7.(4) when the corridor serves a Group E or Group F, Division 1 or 2 occupancy. 3.3.1.5. Egress Doorways (1) Except for dwelling units, a minimum of 2 egress doorways located so that one doorway could provide egress from the room or suite as required by Article 3.3.1.3. if the other doorway becomes inaccessible to the occupants due to a fire which originates in the room or suite, shall be provided for every room and every suite (a) whose area is more than 15 m2 and is used for (i) a high hazard industrial occupancy, or (ii) a hazardous room, (b) intended for an occupant load more than 60, (c) in a floor area that is not sprinklered, and (i) the area of a room or suite is more than the value in Table 3.3.1.5.A., or (ii) the travel distance within the room or suite to the nearest egress doorway, is more than the value in Table 3.3.1.5.A., (d) in a floor area that is sprinklered and does not contain a high hazard industrial occupancy and (i) the travel distance to an egress doorway is more than 25 m, or (ii) the area of the room or suite is more than the value in Table 3.3.1.5.B., or (e) where the area of the room is more than 100 m2 and it is a hazardous classroom in elementary or secondary school. Table 3.3.1.5.A. Egress in Floor Area not Sprinklered Forming Part of Sentence 3.3.1.5.(1)  Occupancy of Room or Suite

Maximum Area of Room or Suite, m2

Maximum Distance to Egress Doorway, m


Group A

150

15


Group C

150(1)

25(1)


Group D

200

25


Group E

200

25


Group F, Division 2

200

25


Group F, Division 3

200

25


Column 1

2

3 Note to Table 3.3.1.5.A.: (1)See Article 3.3.4.4. for dwelling units. Table 3.3.1.5.B. Egress in Floor Area Sprinklered Forming Part of Sentence 3.3.1.5.(1)  Occupancy of Room    or Suite

Maximum Area of Room or Suite, m2


Group A

200


Group B, Division 1

100


Group B, Division 2 or 3

 


  sleeping rooms

100


  other than sleeping rooms

200


Group C

150(1)


Group D

300


Group E

200


Group F, Division 2

200


Group F, Division 3

300


Column 1

2 Note to Table 3.3.1.5.B.: (1)See Article 3.3.4.4. for dwelling units. (2) Except for a mezzanine within a dwelling unit, every mezzanine that is not required to terminate at a vertical fire separation in Article 3.2.8.2. shall have 2 egress facilities placed in such a manner that one facility could provide egress from the mezzanine if the other facility becomes inaccessible to the occupants of the mezzanine due to a fire which might originate in the room or suite in which the mezzanine is located where (a) the occupancy of the mezzanine, room or suite is classified as Group F, Division 1, (b) the mezzanine is intended for an occupant load of more than 60 persons, (c) in a floor area that is not sprinklered, (i) the area of a mezzanine is more than the value in Table 3.3.1.5.A., or (ii) the travel distance to an egress doorway or an egress facility is more than the value in Table 3.3.1.5.A., or (d) in a floor area that is sprinklered, (i) the travel distance to an egress doorway or an egress facility is more than 25 m, or (ii) the area of the mezzanine is more than the value in Table 3.3.1.5.B. (3) For the purpose of Clause (2)(c) and Clause 2(d) (a) if the room or suite in which the mezzanine is located is permitted to have one egress doorway, the travel distance is measured from any point on the mezzanine to that doorway, or (b) if the room or suite in which the mezzanine is located is required to have more than one egress doorway, the travel distance is measured from any point on the mezzanine to the nearest egress facility leading from the mezzanine. (4) Except for a mezzanine which is not considered as a storey in calculating building height in Sentence 3.2.1.1.(4), where the space below a mezzanine is enclosed, an egress facility from the mezzanine shall not lead into the enclosed space.