3.1.15.2.Roof Coverings

(1) Except as provided by Sentences (2) to (4), every roof covering shall have a Class A, B or C classification as determined in accordance with Article 3.1.15.1. (2) A roof covering is not required to have a Class A, B or C classification for (a) a tent, (b) an air-supported structure, (c) a building of Group A, Division 2 occupancy not more than 2 storeys in building height and not more than 1 000 m2 in building area, provided the roof covering is underlaid with noncombustible material, or (d) a steel building system described in Article 4.3.4.3., provided the roof covering consists of brick, masonry, concrete, metal sheets or metal shingles. (3) Except as provided in Sentence (5), roof coverings on buildings conforming to Article 3.2.2.51. or 3.2.2.60. shall have a Class A classification where the roof height is greater than 25 m measured from the floor of the first storey to the highest point of the roof. (4) Except as provided in Sentence (5), roof coverings in buildings or parts of buildings permitted to be of encapsulated mass timber construction shall have a Class A classification if the roof height is greater than 25 m measured from the floor of the first storey to the highest point of the roof. r1 (5) Where buildings or parts thereof conforming to Article 3.2.2.48., 3.2.2.51., 3.2.2.57., 3.2.2.60. or 3.2.2.93. include non-contiguous roof assemblies at different elevations, the roof coverings referred to in Sentences (3) and (4) are permitted to be evaluated separately to determine the roof covering classification required.