Steve,
What I was referring to is taking sprinkler branchlines directly off of
standpipe bulk main, prior to establishing a sprinkler zone.
----- Original Message -----
From: "Steve Leyton" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, August 14, 2007 10:46 AM
Subject: RE: interconnection of standpipes
Jeff:
I agree with your statement that Karen's description meets the intent of
the standard, but not necessarily that sprinklers can't come off the
bulk main(s). Whether floor controls are required or not, you could
pull a sprinkler riser off the bulk piping, so long as it is sectionally
valved. Add the appropriate hose stream allowance at the POC and I
think it's acceptable. A "combined standpipe system", albeit with a
separate sprinkler riser.
Steve Leyton
Protection Design & Consulting
The foregoing is my opinion only and is not intended to represent the
NFPA 14 Technical Committee, nor serve as an interpretation of the
standard.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jeff
Hewitt
Sent: Tuesday, August 14, 2007 8:03 AM
To: [email protected]
Subject: Re: interconnection of standpipes
Karen,
What you are suggesting meets the intent of the standard, in my opinion,
even though it says to interconnect them at the bottom.
As long as you have established a separate and distinct standpipe
system, it
should not matter if you tie-in on the first floor or third floor for
the
interconnection. Once the standpipe system has been established, you
can
then utilize it for combination systems via control valves, check valves
and
flow switches.
One common mistake I have seen is trying to take sprinkler protection
from
bulk standpipe mains, prior to interconnection with other standpipes.
Jeff Hewitt, PE, SET, MSFPE
Bi-State Fire Protection Corporation
----- Original Message -----
From: "Karen Purvis" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, August 14, 2007 9:39 AM
Subject: interconnection of standpipes
I have not been able to find a good answer to this question so I turn
to
my
fellow forum readers. When interconnecting standpipes NFPA 14 a.7.5
says
it
should occur as close as possible to the source of supply as possible.
If
I
have four pipes and three can be connected on the first floor but the
third
one needs to go over an exposed area can it connect on the third floor
to
the closest pipe or is there a better way of connecting them.
Karen Purvis
Designer
Facility Systems Consultants
714 S Gay St
Knoxville, TN 37902
ph.865-246-0164
fax 865-246-1084
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