You have already answered the question by referring to the fire truck as a pump, which it is. If more pressure is needed,they simply pump it.
Lamar Vaughn, SET On Tue, Nov 18, 2014 at 2:15 PM, Brian Harris <[email protected]> wrote: > Duane- > I've sent him a copy of our calc's showing exactly what you described with > the flat line, he's still convinced that the added flow (250) will required > more pressure. Not that it's totally accurate I told him to think of the > fire truck as a pump and it was providing the pressure for the outside hose > streams... > > Brian Harris, CET > BVS Systems Inc. > bvssytemsinc.com > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Duane Johnson > Sent: Tuesday, November 18, 2014 2:05 PM > To: [email protected] > Subject: RE: Hose added to calc's. no PSI > > We allow for the fire department to fight the fire while the sprinklers > are activated. So, while the sprinklers are flowing at X psi @ Y gpm, the > fire department will open up a fire hydrant to flow additional gpm. The > pressure they use is less than the sprinkler requirements. Therefore we > need to account for additional gpm, but not additional psi. Show him a > graph with the horizontal line at the top of the sprinkler demand... > > Duane Johnson, PE > Design Manager > Strickland Fire Protection > 301-474-1136 Office > 301-455-0010 Cell > > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Brian Harris > Sent: Tuesday, November 18, 2014 1:59 PM > To: [email protected] > Subject: Hose added to calc's. no PSI > > I've been trying to explain to a civil engineer that we (fire sprinkler) > include outside hose allowance into our calc's but only for the extra gpm, > not as far as additional psi goes. I'm sure it's the way I'm trying to > explain it that's not making any sense to him, can one of you more versed > in the English language help me out and put it in layman's terms for me? > > Brian Harris, CET > BVS Systems Inc. > Sprinkler Division > bvssystemsinc.com<http://bvssystemsinc.com/> > Phone: 704.896.9989 > Fax: 704.896.1935 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
