I'm looking at some pre-designed fire sprinkler drawings showing extended
coverage uprights in a concealed combustible space above a grid ceiling
consisting of open web wood trusses (relatively no pitch) at 24" o/c.
Looking at 8.4.3. (2007 ed) I don't think this is permissible mainly because of
the "smooth, flat" criteria. Am I right? And does someone make an EC upright
that can possibly be used in this scenario (besides the Tyco attic sprinklers).
Thanks,
Ralph
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