9.17.3.2.(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:
Top plate for steel columns that support steel beams,
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 supported by 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 exempt from the application of Sentence
9.17.3.2.(1) columns
supporting steel beams, where lateral support for the top of the column top
[see Sentence
9.17.2.2.(1)] is achieved in another way.