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9.27.11.2.(2)
OH1OS2OP2
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20-OP2.1,OP2.3,OP2.4] [F22-OP2.3,OP2.4,OP2.5] Applies where panel-type cladding is installed to provide the required bracing.
Application
Application 1: 
Minimum thickness of OSB conforming to the O-2 grade of CSA O437.0, “OSB and Waferboard,” applied directly to framing or over furring strips as cladding, on 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 that OSB cladding will not be strong enough or rigid enough.
Where panel-type cladding is installed as bracing to satisfy Subclause 9.23.10.2.(2)(b)(i), this is to limit the probability of an inadequate resistance to lateral loads, which could lead to racking of exterior walls.
This is to limit the probability of:
  • the deformation of the building,
  • the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to compromised structural integrity of exterior walls or of elements supported or protected by exterior walls, or
  • falling cladding components.
This is to limit the probability of:
  • the space being unsuitable for its intended use,
  • compromised operation of windows and doors, or
  • damage to the building.
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