9.27.11.1.(4)

Objective

OS2 Structural Safety

Attribution

[F20-OS2.1,OS2.3,OS2.4][F22-OS2.3,OS2.4,OS2.5]Applies where panel-type cladding is installed to provide the required bracing.

Intent

Intent 1:

To limit the probability of:

  • performance that falls significantly below expectations, which could lead to an inability to resist expected mechanical, impact and environmental loads, which could lead to deformation or premature failure, or
  • where panel-type siding is installed as bracing to satisfy Subclause 9.23.13.1.(2)(a)(i) and Clause 9.23.13.6.(1)(a), insufficient material strength, which could lead to an inability to resist lateral loads, which could lead to buckling, which could lead to racking of exterior walls.

This is to limit the probability of precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of exterior walls or elements protected by exterior walls, which could lead to harm to persons.

Intent 2:

To supersede the thickness requirement stated in the first part of the Sentence and allow a reduced thickness in cases where extra support is provided.

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