Dewayne --
I've always told the FD where to set the pumper for a
requirement at the top of the standpipe. Here in Ohio it's
65 or 100 psi, depending. NFPA 14 tells you how many gallons.
Unless you have a twenty story building, 200 psi would be 'weird'.
Vince
At 11:35 AM 4/10/2007, you wrote:
I have always left the city pressure out but one of my designers
questioned me on it after they did a calc showing a demand over
[EMAIL PROTECTED] supplied by both the truck and city pressures. It just
looked weird on the calc to see this.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Cliff
Whitfield
Sent: Tuesday, April 10, 2007 10:29 AM
To: [email protected]
Subject: RE: Manual wet standpipes
Dewayne,
I imagine there are some FD guys out there that will know for sure but I
would believe that you would not include any pressure from the city
water.
I believe the FD would not want to pressurize the system beyond 150 PSI
not knowing if the system components could take pressure beyond 175
since that is what most are rated.
Cliff
Fire Design, Inc.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dewayne
Martinez
Sent: Tuesday, April 10, 2007 10:23 AM
To: SprinklerFORUM
Subject: Manual wet standpipes
We have a discussion in our office on the correct way to calculate a
manual wet standpipe.
Our local fire department pumper trucks are set for 150PSI @ 1500 GPM
and contain a 1500 gallon tank For calculating a manual wet standpipe
back to the fire department connection, should we only use the rated
capacity of the pumper truck or are we allowed to add in the city water
pressure/flow available at the hydrant at which they hook up to? IE:
Either treat it as a stand alone fire pump off a tank or as a standard
fire pump w/ city water supply added in.
Thanks,
Dewayne
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Vince Sabolik
Christi Fire Protection, Inc.
11351 Pearl Road
Strongsville, Ohio 44136
T 440 572-7730 F 440 572-7719 Email:
<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]
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