Back9.3.2.2.(1)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand 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, OS2.3

 

APPLICATION:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure, or
  • where lumber supports or is used in an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements.
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, OP2.4, OP2.4, OP2.3

 

APPLICATION:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • where lumber supports or is used in 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 further compromised structural integrity, or
  • an inability to resist expected loads, which could lead to
    • the excessive deformation or deflection of walls, or
    • the excessive deflection or vibration of floors.
This is to limit the probability of:
  • the space being unsuitable for its intended use,
  • compromised operation of windows and doors, and
  • damage to the building.

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:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
This is to limit the probability of:
  • compromised structural integrity, or
  • where lumber supports or is used in 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, or
  • an inability to resist expected loads, which could lead to
    • the excessive deformation or deflection of walls, or
    • the excessive deflection or vibration of floors.
This is to limit the probability of:
  • a loss of balance, tripping or falling,
  • the compromised operation of doors or windows required for egress in an emergency.
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.

Objective:

OH1.1, OH1.2, OH1.3

 

APPLICATION:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
Where lumber supports or is used in an environmental separator, this is to limit the probability of compromised performance of the building envelope, which could lead to:
  • condensation,
  • precipitation ingress, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of indoor air and surface temperatures, 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:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS1.2

 

APPLICATION:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
Where lumber is used in assemblies that are required to provide fire resistance, this is to limit the probability of the compromised fire resistance of the assembly, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OH4

 

APPLICATION:

Minimum grades for visually graded lumber used as:
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].

INTENT:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity or wind uplift loads.
This is to limit the probability of:
  • compromised structural integrity, or
  • where lumber supports or is used in 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.
This is to limit the probability of:
  • the excessive deformation of walls, ceilings and roofs, and
  • deflection or vibration of floors.
This is to limit the probability of negative effects on the psychological well-being of persons.