(1) A building classified as Group F, Division 1 is permitted to conform to Sentence (2) provided,
(a) except as permitted by Sentence 3.2.2.7. (1), the building is sprinklered,
(b) it is not more than 3 storeys in building height, and
(c) it has a building area not more than,
(i) 3 600 m2 if 1 storey in building height,
(ii) 1 800 m2 if 2 storeys in building height, or
(iii) 1 200 m2 if 3 storeys in building height.
(2) The building referred to in Sentence (1) is permitted to be of heavy timber 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) loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.