(1)
If a fire-retardant-treated wood roof system is used to comply with the requirements of Subsection 3.2.2., the roof deck assembly shall meet the conditions of acceptance of CAN/ULC-S126, “Standard Method of Test for Fire Spread Under Roof-Deck Assemblies.”
(2)
Supports for the roof deck assembly referred to in Sentence (1) shall consist of
(a)
(b)
(c)
noncombustible construction, or
(d)
a combination thereof.