Back9.23.4.4.(2)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS2.1, OS2.5, OS2.4, OS2.5, OS2.3

 

APPLICATION:

Maximum thickness, weight, location of installation and minimum compressive strength of concrete topping supported by lumber floor joists selected from Table 9...., in residential applications or where the live load on any floor does not exceed 1.9 kPa, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].

INTENT:

To limit the probability of inadequate joist strength or inadequate composite strength and stiffness to support the additional weight of a concrete topping, which could lead to excessive deflection or failure.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural collapse of wood-frame construction, or
  • where wood-frame construction supports or is part of an environmental separator, 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 harm to persons.