(1)
A building classified as Group G, Division 2 of any building height or building area is permitted to be of combustible construction or noncombustible construction, used singly or in combination, provided
(a)
the building is sprinklered throughout,
(b)
floor assemblies are fire separations with a fire-resistance rating not less than 45 min, and
(c)
loadbearing walls, columns and arches have a fire-resistance rating not less than that required for the supported assembly.