(1)
A building classified as Group G, Division 1 is permitted to be of combustible construction or noncombustible construction, used singly or in combination, provided
(a)
the building is sprinklered throughout,
(b)
the building is not more than 3 storeys in building height,
(c)
the building has a building area not more than
(i)
4 800 m
(ii)
2 400 m
(iii)
1 600 m
(d)
floor assemblies, including the floor assembly immediately above a basement, are fire separations with a fire-resistance rating not less than 45 min, and
(e)
loadbearing walls, columns and arches have a fire-resistance rating not less than that required for the supported assembly.