(1)
Except as permitted by Sentences (2) and (3), a building classified as Group A, Division 4 shall be of noncombustible construction.
(2)
Roof assemblies and supporting arches and columns are permitted to be of heavy timber construction.
(3)
A building classified as Group A, Division 4 is permitted to be of combustible construction provided
(a)
the occupant load is less than 1 500, and
(b)
the building has a limiting distance not less than 6 m.
(4)
Sprinklers shall be installed in all spaces below tiers of seats in a building classified as Group A, Division 4 if those spaces are used for occupancy. (See Note A-3.2.2.35.(4))