I'm assuming that the subject is a mid-rise building and not a high-rise? That confirmed, I agree with Lamar, that the hydraulics of a manual standpipe system shouldn't impact the automatic water supply for sprinklers or public improvements related to that service lateral.
I would normally add a sarcastic or disparaging comment about civil engineers but am resolved to being more diplomatic. This week. SL -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Lamar Vaughn Sent: Tuesday, November 18, 2014 11:18 AM To: Sprinkler Forum Subject: Re: Hose added to calc's. no PSI 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-firesprinkl > er.org _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.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
