3.1.6.12.Combustible Flooring Elements

(1) Wood members that are more than 50 mm but not more than 300 mm high are permitted to be used for the construction of a raised platform in a building or part of a building permitted to be of encapsulated mass timber construction, and they need not conform to Articles 3.1.6.3. and 3.1.6.4., provided (a) the concealed spaces created by the wood members are divided into compartments by fire blocks in conformance with Sentence 3.1.11.3.(4), and (b) the wood members are (i) applied directly to or set into a noncombustible floor slab, or (ii) applied directly to a mass timber floor assembly that conforms to the requirements of Article 3.1.6.3. (2) The upper surface of the mass timber floor assembly referred to in Subclause (1)(b)(ii) is permitted to be encapsulated only between the wood members by a material or assembly of materials conforming to Sentences 3.1.6.4.(1) and (2). (3) The floor system for the raised platform referred to in Sentence (1) is permitted to include a combustible subfloor and combustible finished flooring.