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9.23.11.3.(1)
ApplicationIntent
OS2OP2OH1OH4OS1OS3
ObjectiveOH4 Vibration and Deflection Limitation
Attribution
[F22-OH4] Applies to floors and elements that support floors.
Application
Application 1: 
Minimum number of top wall plates in loadbearing stud 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 Sentences 9.23.11.3.(2) to (4), which apply where studs are directly beneath the supported framing above, or where lintels provide the required support.
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Intent
Intent 1: 
To limit the probability of inadequate capacity to transfer loads from supported floor and roof framing members, which could lead to an inability to resist expected gravity and lateral loads, which could lead to:
  • the inadequate distribution of vertical loads to and from studs, which could lead to the excessive deflection of wall plates, or
  • inadequate diaphragm action of plates, which could lead to the excessive deflection of walls.
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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