Atrium Fire Requirements

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    David Kaplan

    Brigid,

    What's confusing you is that this diagram is trying to illustrate two sections of the code at once.  Code says that if you have an atrium, the entire building must be sprinkled.  Exception: The atrium is separated by 2 HR fire barriers and/or horizontal assemblies.

    Assuming you don't go this route and you are in fact a sprinkled building, the 1 HR fire separation is a requirement.  There are a couple of exceptions to this as well listed in the code.

    A lot of the diagrams in BCI try to illustrate all the code requirements relating to that diagram in one shot - this is just one example. 

    Hope that helps.

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