The floor control valve for all intents and purposes is going the way
of the dodo bird. Starting with the next edition, each floor for
building 3 stories and above must be set-up as an individual system.
It's also amusing if you follow the current criteria trail, there is
nothing that dictates the floor assembly displayed in A.8.17.4.2(b) is
currently required (even on a high-rise)!!!
Roland
On Apr 12, 2012, at 5:08 AM, Morey, Mike wrote:
From NFPA 25 2011:
3.3.7.2 Sectional Drain. A drain lo cated beyond a sectional control
valve that drains only a portion of the system (e.g., a drain
located beyond a floor control valve on a multistory building).
Interestingly there is a conflicting entry in NFPA 13 2010 that
probably should be addressed if this is the way we're going (not
requiring full flow main drain tests @ floor controls):
8.17.3.1 A pressure gauge with a connection not smaller than 1/4 in.
(6 mm) shall be installed at the system main drain, at each main
drain associated with a floor control valve, and on the inlet and
outlet side of each pressure-reducing valve.
Mike Morey, SET, CFPS
Sprinkler Designer
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