3.2.2.70.

(1) A building classified as Group F, Division 2 is permitted to conform to Sentence (2) provided,

(a) it is not more than 4 storeys in building height, and

(b) it has a building area not more than the value in Table 3.2.2.70.A. or Table 3.2.2.70.B.

(2) The building referred to in Sentence (1) shall be of combustible construction or noncombustible construction used singly or in combination, and

(a) floor assemblies shall be fire separations with a fire-resistance rating not less than 45 min,

(b) mezzanines shall have, if of combustible construction, a fire-resistance rating not less than 45 min,

(c) if the building is not sprinklered, roof assemblies shall have, if of combustible construction, a fire-resistance rating not less than 45 min, except that in buildings not more than 1 storey in building height, the fire-resistance rating is permitted to be waived provided the roof assembly is constructed as a fire-retardant treated wood roof system conforming to Article 3.1.14.1., and the building area is not more than,

(i) 1 600 m² if facing 1 street,

(ii) 2 000 m² if facing 2 streets, or

(iii) 2 400 m² if facing 3 streets,

(d) loadbearing walls, columns and arches supporting an assembly required to have a fire-resistance rating shall,

(i) have a fire-resistance rating not less than 45 min, or

(ii) be of noncombustible construction, and

(e) loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the supported assembly.