Good idea Chris, thanks.  Invaluable forum as previously stated.  Can AHJ's 
join this association as a means of support for this resource.
 
Rich Richardson
Seattle Fire Department

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Chris Cahill
Sent: Thursday, May 06, 2010 11:00
To: [email protected]
Subject: RE: Pre-action in same space as wet pipe system

I think Brad is on the right track.  With the detection should pick up
things in the non-PA space near the boundary so it's just a dry system as it
spreads to the PA side of things.  The whole non-PA side maybe not.  

Thinking out loud couldn't the non-PA flow switch be tied into the PA system
along with the detection to trip the electrical side of the PA valve?  

Chris Cahill, P.E.
Fire Protection Engineer
Sentry Fire Protection, Inc.
 
763-658-4483
763-658-4921 fax
 
Email: [email protected]
 
Mail: P.O. Box 69
        Waverly, MN 55390
 
Location: 4439 Hwy 12 SW
              Waverly, MN 55390

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Richardson, R
Sent: Thursday, May 06, 2010 12:27 PM
To: [email protected]
Subject: Pre-action in same space as wet pipe system

Seeking opinions about a proposal where a pre-action system covers part of a
large space, the other parts being covered with a wet pipe system.  There is
no separation between the two system types.

Thanks in advance,

Rich Richardson
Seattle Fire Department

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