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9.23.12.3.(1)
ApplicationIntent
OS2OP2OH1OH4OS1OS3
ObjectiveOH4 Vibration and Deflection Limitation
Attribution
[F22-OH4] Applies to floors and elements that support floors.
Application
Application 1: 
Maximum spans for wood lintels, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.]:
  • in buildings of residential occupancy,
  • where wall studs exceed 38 mm by 64 mm in size,
  • where the spans of supported joists do not exceed 4.9 m, and
  • where the spans of trusses do not exceed 9.8 m.
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Intent
Intent 1: 
To limit the probability of excessively long spans, which could lead to an inability to resist expected gravity and lateral loads around openings.
For floors and constructions supporting floors, this is to limit the probability of:
  • compromised structural integrity, or
  • for exterior floors or environmental separators supporting a floor, 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 excessive movement, vibration or deflection of floors, which could lead to negative effects on the psychological well-being of persons.
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