ARCHIVED - 9.14.2.1.(2)

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9.14.2.1.(2)


Objective	OS2 Structural Safety
Attribution	(b) [F21-OS2.1] (b) [F21-OS2.3] Applies where foundations serve as or support an environmental separator.
Application	Application 1: Crushed rock backfill that is installed adjacent to the exterior surface of foundation walls of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]. Exceptions: except for: the foundation walls of crawl spaces whose exterior walls have 25% or more of their total area above exterior ground level open to the outdoors [see Sentence 9.18.1.1.(1)] and where drainage can be shown to be unnecessary [see Sentences 9.18.5.1.(1) and (2)], foundation walls that are subject to continuous hydrostatic pressure, and foundation walls that are effectively drained by the native soil or that have otherwise demonstrated that they do not require drainage.
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Intent	Intent 1: To limit the probability of excessive lateral loading on foundation walls, which could lead to the movement or cracking of foundation walls or building superstructures. This is to limit the probability of compromised structural integrity, which could lead to: structural failure, or for environmental separators or elements supporting environmental separators, the displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity. This is to limit the probability of harm to persons.
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