I would bet money that he is confusing Quick Response with water delivery time and as others have pointed out the latter is compensated for in the increased design area when using area density. This I interpret to be a property protection issue. As to life safety 13R/2002 5.3.1 states: "A wet pipe system shall be used where PIPING (my emphasis) is installed in areas that can be maintained reliably above 40F." It then goes on to allow dry pipe specifically in the next paragraph. I can find no similar admonition in 13, which you indicated was the applicable standard. The standard either it specifies what you must do or what you can't do. When it is silent on an issue....I'd ask AFSA for an informal interp[retation on this one so you have closer to official bullets than just our educated opinions.
On 7/28/07, Greg McGahan <[EMAIL PROTECTED]> wrote: > His reasoning is flawed - He says that the dry system will result in a delay > in water getting to the fire. True enough, but that is why the increased > remote area usually. The engineer specified that the any method of calcs > allowed in NFPA 13 would be acceptable; therefore the largest room rule > could be applied as this is a dorm of sorts with many small rooms, so I am > reluctant to argue that point yet. > Greg > > Living Water Fire Protection, LLC > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > Fax: 850-937-1852 > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Vince Sabolik > Sent: Friday, July 27, 2007 5:24 PM > To: [email protected] > Subject: Re: Dry System with Pendents > > 7.2.2 Sprinklers. The following types of > sprinklers and arrangements shall be permitted for dry pipe systems: > > (1) Upright sprinklers > (2)* Listed dry sprinklers > (3) Pendent sprinklers and sidewall > sprinklers installed on return bends, where the > sprinklers, return bend, and branch line piping > are in an area maintained at or above 40°F (4°C) > (4) Horizontal sidewall sprinklers, > installed so that water is not trapped > > Now, what could be so confusing to THIS AHJ? > > > At 05:58 PM 7/27/2007, you wrote: > > >We have an AHJ telling us that we can not use a dry system to feed an > >unheated attic and the heated space below the ceiling. He is insisting that > >we use a wet system for the lower area with insulation on top of the > piping. > >We have done this many times in the past but on this project it is very > >difficult to accomplish this due to the construction. > > > >I am having a hard time refuting him with concrete proof that there is > >nothing wrong with using the dry system with dry pendents. > > > >Thanks for any input from the forum. > >Greg > >Living Water Fire Protection, LLC > >1160 McKenzie Road > >Cantonment, FL 32533 > >850-937-1850 > >Fax: 850-937-1852 > > > > > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >To Unsubscribe, send an email to:[EMAIL PROTECTED] > >(Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
