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9.13.3.4.(2)
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Sealing of holes and recesses in cast-in-place concrete walls that are in contact with the ground and that are subject to hydrostatic pressure, where the ground level outside is higher than the ground level inside, in 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 substrate, which could lead to discontinuity in the waterproofing, which could lead to the ingress of moisture from the ground, which could lead to deterioration, which could lead to compromised structural integrity of elements protected by such walls, which could lead to harm to persons.
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