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9.20.8.5.(1)
OH1OS2OP2OS1
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20,F22-OP2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Maximum projection of masonry veneer of hollow units 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 eccentricity of loads and instability.
This is to limit the probability of:
  • compromised structural integrity of masonry veneer, or
  • cracking of masonry or mortar, which could lead to excessive water ingress into or through assemblies, which could lead to the deterioration of elements protected by the masonry, which could lead to compromised structural integrity.
This is to limit the probability of damage to the building.
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