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9.13.3.1.(2)
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Waterproofing of roofs of underground buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of an inadequate resistance of underground roofs to water, which could lead to water ingress, which could lead to deterioration, which could lead to compromised structural integrity of roofs or of elements protected by roofs, which could lead to harm to persons.
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