Back9.4.2.3.(1)

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Minimum specified load due to snow and occupancy for balconies, decks and other accessible exterior platforms intended for occupancy and subject to snow loads, where the construction, or each segregated area of the construction, serves a single dwelling unit.
This applies to light-frame buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], whose wall, floor and roof planes are generally comprised of frames of small repetitive structural members, and where:
  • roof and wall planes are clad, sheathed or braced on at least one side,
  • the small repetitive structural members are spaced not more than 600 mm o.c.,
  • the clear span of any structural member does not exceed 12.2 m,
  • the maximum deflection of the structural roof members conforms to Article 9.4.3.1.,
  • the maximum total roof area, notwithstanding any separation of adjoining buildings by firewalls, is4 550 m2, and
  • for flat roofs, there are no significant obstructions on the roof, such as parapet walls, spaced closer than the distance calculated by: Do=10Ho-0.8 Ss/g where Do = minimum distance between obstructions, m, Ho = height of the obstruction above the roof, m, Ss = ground snow load, kPa, and γ = unit weight of snow, kN/m3.

INTENT:

To limit the probability of inadequate load-carrying capacity, which could lead to an inadequate resistance to gravity loads, which could lead to structural failure, which could lead to structural collapse, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OP2.1

 

APPLICATION:

Minimum specified load due to snow and occupancy for balconies, decks and other accessible exterior platforms intended for occupancy and subject to snow loads, where the construction, or each segregated area of the construction, serves a single dwelling unit.
This applies to light-frame buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], whose wall, floor and roof planes are generally comprised of frames of small repetitive structural members, and where:
  • roof and wall planes are clad, sheathed or braced on at least one side,
  • the small repetitive structural members are spaced not more than 600 mm o.c.,
  • the clear span of any structural member does not exceed 12.2 m,
  • the maximum deflection of the structural roof members conforms to Article 9.4.3.1.,
  • the maximum total roof area, notwithstanding any separation of adjoining buildings by firewalls, is 4 550 m2, and
  • for flat roofs, there are no significant obstructions on the roof, such as parapet walls, spaced closer than the distance calculated by: Do=10Ho-0.8 Ss/g where Do = minimum distance between obstructions, m, Ho = height of the obstruction above the roof, m, Ss = ground snow load, kPa, and γ = unit weight of snow, kN/m3.

INTENT:

To limit the probability of inadequate load-carrying capacity, which could lead to an inadequate resistance to gravity loads, which could lead to compromised structural integrity, which could lead to damage to the building.