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9.15.5.2.(2)
OS2OP2OH1OH4OS3
ObjectiveOH4 Vibration and Deflection Limitation
Attribution
[F80-OH4] Applies to floors and elements that support floors.
Application
Application 1: 
Beams supported below the top of foundation walls of masonry units, on soils having an allowable bearing pressure of 75 kPa or greater, for buildings of wood-frame or masonry construction to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.15.1.2.(1), which applies to buildings that are erected on permafrost.
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Intent
Intent 1: 
To limit the probability of inadequate protection, which could lead to beam ends being exposed to water from rain or melting snow, which could lead to rotting or corrosion of the ends of beams.
This is to limit the probability of:
  • compromised structural integrity, or
  • where elements support or are part of an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements.
For floors and elements supporting floors, this is to limit the probability of excessive movement, deflection or vibration, which could lead to negative effects on the psychological well-being of persons.
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