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9.20.9.5.(2)
ApplicationIntent
OS2OP2OH1OS1
ObjectiveOS2 Structural Safety
Attribution
[F20,F80-OS2.1]
[F20,F80-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Fastening of strap ties to wood framing members, for masonry veneer 75 mm or more in thickness and resting on a bearing support, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:
  • where the wall height above the foundation wall does not exceed 11 m, and
  • in which the roof or floor system above the first storey is not of concrete construction.
Exceptions: 
except as stated in Sentence 9.20.1.1.(2), which applies to buildings other than described above, or where the masonry is designed for specified loads on the basis of ultimate and serviceability limit states.
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Intent
Intent 1: 
To limit the probability of:
  • excessive flexibility in the connection between masonry veneer and backup framing, or
  • an inability to resist lateral loads.
This is to limit the probability of the excessive flexing of masonry veneer, which could lead to cracking or buckling.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure of masonry construction, or
  • where masonry construction is part of an environmental separator, the excessive deformation, 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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