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9.23.12.2.(2)
ApplicationIntent
OS2OP2OH1OH4OS1OS3
ObjectiveOS3 Safety in Use
Attribution
[F22-OS3.1] Applies to floors and elements that support floors.
[F22-OS3.7] Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.
Application
Application 1: 
Fastening together of members of wood lintels that are built of two or more members, in loadbearing walls, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].
Exceptions: 
except as stated in Sentence 9.23.12.3.(2), which applies to lintels in loadbearing exterior and interior walls of 38 mm by 64 mm framing.
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Intent
Intent 1: 
To limit the probability of the inadequate distribution of loads among lintel members, which could lead to an inability to resist expected gravity and lateral loads.
This is to limit the probability of:
  • compromised structural integrity,
  • where elements support or are part of an environmental separator, the failure of required environmental separation elements, which could lead to deterioration, or
  • an inability to resist expected loads, which could lead to:
    • the excessive deflection or vibration of floors, or
    • the excessive movement or deformation of walls.
This is to limit the probability of:
  • compromised operation of doors or windows required for egress in an emergency, and
  • persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.
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