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3.1.4.6.(2)
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Application
Application 1: 
Minimum dimensions of wood elements in heavy timber construction in buildings described in Sentence 1.3.3.2.(1) of Division A where:
Exceptions: 
except as provided in Sentences 3.1.4.6.(3) to (6) and (12).
Application 2: 
This also applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] where heavy timber construction is considered to have a 45 min fire-resistance rating, as stated in Sentence 9.10.6.2.(1).
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Intent
Intent 1: 
To describe the minimum dimensions of structural members in heavy timber construction to limit the probability that the wood elements will prematurely fail when subjected to fire, which could lead to premature failure of the remainder of the heavy timber construction.
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