Back9.17.3.4.(2)

ATTRIBUTION:

Most technical provisions of the BC Fire Code describe how the code’s objectives and functional statements are achieved. However, some provisions, like this one, do not relate directly to a code objective. The following analysis is provided to assist in understanding of the provision.

 

APPLICATION:

In buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:
  • adjustable steel columns with allowable loads exceeding 36 kN, and
  • steel columns other than those 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 expand the application of Part 4 to include steel columns whose imposed loads are likely to exceed the resistance of the steel columns identified in Section 9.17.