ARCHIVED - 9.3.1.6.(1)

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9.3.1.6.(1)


Objective	OS2 Structural Safety
Attribution	(a) [F20-OS2.1] (a) [F21,F80-OS2.3] (a) [F20-OS2.3] Applies to elements that support or are part of an environmental separator.
Application	Application 1: Minimum compressive strength of site-batched, cast-in-place concrete that is not required to be reinforced that is used in: footings, foundation walls, walls, columns, grade beams and piers, and fireplaces and chimneys. This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]. Exceptions: except as stated in: Sentence 9.12.4.1.(1), which applies to concrete in trenches beneath footing, and the second row of Table 9.15.4.2.A., which applies to concrete in foundation walls, where a structural capacity of 15 MPa is inadequate based on the thickness of the wall and the height of the finish ground above the basement floor or crawl space ground cover.
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Intent	Intent 1: To limit the probability of: insufficient compressive strength to resist expected gravity and lateral loads, or the excessive shrinkage, cracking and premature failure of concrete. This is to limit the probability of compromised structural integrity, which could lead to: structural failure, or where concrete supports or is used in an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements. This is to limit the probability of harm to persons.
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