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.

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:

OP2.1, OP2.5, OP2.4, OP2.5, OP2.3

 

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:
  • the space being unsuitable for its intended use,
  • compromised operation of windows or doors, or
  • damage to the building.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OH1.1, OH1.2, OH1.3

 

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.
Where wood-frame construction supports or is part of an environmental separator, this is to limit the probability of the displacement or failure of required environmental separation elements, which could lead to:
  • condensation,
  • precipitation ingress,
  • excessive heat transfer,
  • pollutant ingress, or
  • compromised thermal performance of components intended to resist heat transfer.
This is to limit the probability of:
  • inadequate control of temperatures of interior spaces, drafts, relative humidity or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to further compromised integrity of environmental separators.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

Objective:

OH4

 

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.
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.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS1.2

 

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.
Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS3.1, OS3.7

 

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,
  • where elements support or are part of an environmental separator, the failure of required environmental separation elements, which could lead to deterioration, or
  • an inability to resist expected loads, which could lead to
    • the excessive deflection or vibration of floors, or
    • the excessive movement or deformation of walls.
This is to limit the probability of:
  • compromised operation of doors or windows required for egress in an emergency, and
  • persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.