Back4.1.6.2.(8)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Shape factor for calculating the specified snow load on areas of roofs subject to snow accumulation.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be designed in accordance with the requirements of Part 4.

INTENT:

To limit the probability that the shape factor will not take into account the roof configuration affecting the maximum expected accumulation of snow on roof areas, which could lead to structural failure, which could lead to harm to persons.
To limit the probability that the value of the shape factor used for roof areas will be less than 1.0 where not warranted, which could lead to structural failure, 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:

OP2.1, OP2.4

 

APPLICATION:

Shape factor for calculating the specified snow load on areas of roofs subject to snow accumulation.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be designed in accordance with the requirements of Part 4.

INTENT:

To limit the probability that the shape factor will not take into account the roof configuration affecting the maximum expected accumulation of snow on roof areas, which could lead to the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building.
To limit the probability that the value of the shape factor used for roof areas will be less than 1.0 where not warranted, which could lead to the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Shape factor for calculating the specified snow load for roof areas, whose value accounts for:
  • non-uniform snow loads on gable, arched or curved roofs and domes,
  • increased snow loads in roof valleys,
  • increased non-uniform snow loads due to snow drifting onto a roof that is at a level lower than other parts of the same building or at a level lower than another building within 5 m of it,
  • increased non-uniform snow loads on areas adjacent to roof projections, such as penthouses, large chimneys and equipment, and
  • increased snow or ice loads due to snow sliding or meltwater draining from adjacent roofs.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be designed in accordance with the requirements of Part 4.

INTENT:

To limit the probability that the shape factor will not take into account the roof configuration affecting the maximum expected accumulation of snow on local areas of the roof, which could lead to structural failure, 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:

OP2.1, OP2.4

 

APPLICATION:

Shape factor for calculating the specified snow load for roof areas, whose value accounts for:
  • non-uniform snow loads on gable, arched or curved roofs and domes,
  • increased snow loads in roof valleys,
  • increased non-uniform snow loads due to snow drifting onto a roof that is at a level lower than other parts of the same building or at a level lower than another building within 5 m of it,
  • increased non-uniform snow loads on areas adjacent to roof projections, such as penthouses, large chimneys and equipment, and
  • increased snow or ice loads due to snow sliding or meltwater draining from adjacent roofs.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be designed in accordance with the requirements of Part 4.

INTENT:

To limit the probability that the shape factor will not take into account the roof configuration affecting the maximum expected accumulation of snow on local areas of the roof, which could lead to the excessive deformation of, or excessive stress in, structural elements, which could lead to damage to the building.