Back4.1.7.4.(1)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Due consideration to differences in air pressure on opposite sides of interior walls or partitions of buildings.
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 design of interior walls and partitions will not take into account the:
  • wind action on and within the building,
  • stack effect due to the difference between the outdoor and indoor temperature, and
  • mechanical air pressurization of the building.
This is to limit the probability that the difference in air pressure on opposite sides of a wall or partition will exceed the capacity of the wall or partition, which could lead to structural failure of interior walls and partitions, 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:

Due consideration to differences in air pressure on opposite sides of interior walls or partitions of buildings.
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 design of interior walls and partitions will not take into account the:
  • wind action on and within the building,
  • stack effect due to the difference between the outdoor and indoor temperature, and
  • mechanical air pressurization of the building.
This is to limit the probability that the difference in air pressure on opposite sides of a wall or partition will exceed the capacity of the wall or partition, which could lead to the excessive deformation of, or excessive stress in, interior walls and partitions, which could lead to damage to the building.