1. OS2
  2. OP2
  3. OH1
  4. OH4
  5. OS3
  6. OS1


OH4 Vibration and Deflection Limitation


[F20,F21,F80-OH4]Applies where concrete elements support wood-frame floors.


Intent 1:

To limit the probability of:

  • an excessive loss of water due to evaporation,
  • the freezing of concrete before the initial set,
  • slowed hydration of the concrete, or
  • the freezing and expansion of the excess water not used in hydration.

This is to limit the probability of:

  • a failure to develop sufficient compressive strength before building loads are applied,
  • shrinkage and cracking, or
  • the failure of internal bonds.

This is to limit the probability of the excessive deformation of concrete, which could lead to:

  • compromised structural integrity, or
  • where concrete elements support an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to compromised structural integrity.

Where concrete elements support wood-frame floors, this is to limit the probability of deflection or vibration of such floors, which could lead to negative effects on the psychological well-being of persons.

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