Back9.17.2.2.(2)

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

F22

To limit movement under expected loads and forces.

Objective:

OS2.4, OS2.5, OS2.3

 

APPLICATION:

Lateral support for columns, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that are used to support:
  • beams carrying loads from not more than 2 wood-frame floors where:
    • the supported length of joists bearing on such beams does not exceed 5 m, and
    • the live load on any floor does not exceed 2.4 kPa,
  • beams or header joists carrying loads from not more than 2 levels of wood-frame balconies, decks or other accessible exterior platforms, or 1 level plus roof, where:
    • the supported length of joists bearing on such beams or rim joists does not exceed 5 m,
    • the sum of the specified snow and occupancy loads on the platform-type construction or roof does not exceed 4.8 kPa,
    • the platform serves only a single suite of residential occupancy, and
    • the platform does not serve as a required exit, and
  • carport roofs.

INTENT:

To limit the probability of inadequate lateral support for columns, which could lead to racking.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure, 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.
This is to limit the probability of 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:

OP2.4, OP2.5, OP2.3

 

APPLICATION:

Lateral support for columns, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that are used to support:
  • beams carrying loads from not more than 2 wood-frame floors where:
    • the supported length of joists bearing on such beams does not exceed 5 m, and
    • the live load on any floor does not exceed 2.4 kPa,
  • beams or header joists carrying loads from not more than 2 levels of wood-frame balconies, decks or other accessible exterior platforms, or 1 level plus roof, where:
    • the supported length of joists bearing on such beams or rim joists does not exceed 5 m,
    • the sum of the specified snow and occupancy loads on the platform-type construction or roof does not exceed 4.8 kPa,
    • the platform serves only a single suite of residential occupancy, and
    • the platform does not serve as a required exit, and
  • carport roofs.

INTENT:

To limit the probability of inadequate lateral support for columns, which could lead to racking.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • 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, 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, or
  • damage to the building.

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

Objective:

OH1.1, OH1.2, OH1.3

 

APPLICATION:

Lateral support for columns, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that are used to support:
  • beams carrying loads from not more than 2 wood-frame floors where:
    • the supported length of joists bearing on such beams does not exceed 5 m, and
    • the live load on any floor does not exceed 2.4 kPa,
  • beams or header joists carrying loads from not more than 2 levels of wood-frame balconies, decks or other accessible exterior platforms, or 1 level plus roof, where:
    • the supported length of joists bearing on such beams or rim joists does not exceed 5 m
    • the sum of the specified snow and occupancy loads on the platform-type construction or roof does not exceed 4.8 kPa
    • the platform serves only a single suite of residential occupancy, and
    • the platform does not serve as a required exit, and
  • carport roofs.

INTENT:

To limit the probability of inadequate lateral support for columns, which could lead to racking.
Where elements support or are part of an environmental separator, this is to limit the probability of:
  • condensation,
  • rainwater ingress,
  • the ingress of moisture from the ground, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of temperatures of interior spaces, relative humidity, or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • compromised integrity of elements supported by foundations, which could lead to the deterioration of building elements.
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:

Lateral support for columns, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that are used to support:
  • beams carrying loads from not more than 2 wood-frame floors where:
    • the supported length of joists bearing on such beams does not exceed 5 m, and
    • the live load on any floor does not exceed 2.4 kPa,
  • beams or header joists carrying loads from not more than 2 levels of wood-frame balconies, decks or other accessible exterior platforms, or 1 level plus roof, where:
    • the supported length of joists bearing on such beams or rim joists does not exceed 5 m
    • the sum of the specified snow and occupancy loads on the platform-type construction or roof does not exceed 4.8 kPa
    • the platform serves only a single suite of residential occupancy, and
    • the platform does not serve as a required exit, and
  • carport roofs.

INTENT:

To limit the probability of inadequate lateral support for columns, which could lead to racking.
This is to limit the probability of:
  • compromised structural integrity, or
  • for environmental separators or elements supporting 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 deflection or vibration of floors, which could lead to negative effects on the psychological well-being of 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:

Lateral support for columns, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], that are used to support:
  • beams carrying loads from not more than 2 wood-frame floors where:
    • the supported length of joists bearing on such beams does not exceed 5 m, and
    • the live load on any floor does not exceed 2.4 kPa,
  • beams or header joists carrying loads from not more than 2 levels of wood-frame balconies, decks or other accessible exterior platforms, or 1 level plus roof, where:
    • the supported length of joists bearing on such beams or rim joists does not exceed 5 m,
    • the sum of the specified snow and occupancy loads on the platform-type construction or roof does not exceed 4.8 kPa,
    • the platform serves only a single suite of residential occupancy, and
    • the platform does not serve as a required exit, and
  • carport roofs.

INTENT:

To limit the probability of inadequate lateral support for columns, which could lead to racking.
This is to limit the probability of:
  • compromised structural integrity,
  • for environmental separators or elements supporting an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, 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 compromised operation of doors or windows required for egress in an emergency, or
  • for floors and elements supporting floors, persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.