3.1.8.8.(4)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:
Fire dampers in noncombustible ducts that penetrate a fire separation that separates a vertical service space from the remainder of the building, where:
- the ducts have a melting point above 760°C, and
- each individual duct exhausts directly to the outside at the top of the vertical service space.
This applies to buildings described in Sentence
1.3.3.2.(1) of Division A.
INTENT:
To exempt certain ducts from the application of Sentence
3.1.8.7.(1), which would otherwise require fire dampers, on the basis
that the lack of fire dampers in this case will not lead to significant spread
of fire.