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9.18.6.2.(2)
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Joints in ground cover in heated crawl spaces whose exterior walls have less than 25% of their total area above exterior ground level open to the outdoors, 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 discontinuity in the ground cover, which could lead to the ingress of moisture that is not under hydrostatic pressure from the ground, which could lead to deterioration, which could lead to compromised structural integrity of building components, which could lead to harm to persons.
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