11.2.1.2 — Multiple Occupancies

(1) Where proposed construction will result in the change of major occupancy of all or part of an existing building to another major occupancy, the building shall be classified as to its, (a) construction on the basis of its construction index as provided for in this Part, including Table 11.2.1.1.A., and (b) occupancy on the basis of its hazard index as provided for in this Part, including Tables 11.2.1.1.B. to 11.2.1.1.N. (2) Small or medium sized existing buildings as determined in Tables 11.2.1.1.B. to 11.2.1.1.N. facing multiple streets may be assigned a hazard index credit of 1, which may be subtracted from the hazard index of the proposed major occupancy to reduce the additional upgrading required by Table 11.4.3.4.A. provided, (a) the building does not contain a Group B, Division 1, a Group C, or a Group F, Division 1 occupancy, and (b) firefighting access complying with Articles 3.2.5.1. to 3.2.5.5. or Subsection 9.10.20. is provided. (3) The requirements of Articles 3.2.2.20. to 3.2.2.83. do not apply to this Part.

(1) In determining the fire safety requirements of a building in relation to each of the major occupancies contained in it, the building height and building area of the entire building shall be used. (2) For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy.

(1) Except as permitted by Articles 3.2.2.7. and 3.2.2.8. and Sentences 3.2.2.42A. (4), 3.2.2.43A. (5), 3.2.2.49A. (3) and 3.2.2.50A. (4), in a building containing more than one major occupancy, the requirements of this Subsection for the most restricted major occupancy contained shall apply to the whole building. (2) For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy.

(1) Except as permitted by Article 3.2.2.8. and Sentences 3.2.2.42A. (4), 3.2.2.43A. (5), 3.2.2.49A. (3) and 3.2.2.50A. (4), in a building in which one major occupancy is located entirely above another major occupancy, the requirements in this Subsection for each portion of the building containing a major occupancy shall apply to that portion as if the entire building was of that major occupancy. (2) If one major occupancy is located above another major occupancy, the fire-resistance rating of the floor assembly between the major occupancies shall be determined on the basis of the requirements of this Subsection for the lower major occupancy. (3) For the purposes of Sentences (1) and (2), a retirement home is deemed to be a separate major occupancy.

(1) In a building in which the aggregate area of all major occupancies in a particular Group or Division is not more than 10% of the floor area of the storey in which they are located, these major occupancies need not be considered as major occupancies for the purposes of this Subsection, provided they are not classified as Group F, Division 1 or 2 occupancies. (1.1) For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy. (2) A helicopter landing area on the roof of a building need not be considered a major occupancy for purposes of Subsection 3.2.2. where such landing area is not more than 10% of the area of the roof.