I went down his road once, thinking that if an area wasn't subject to freezing then a dry system can't be used. After all, that's just the reverse of the requirement that if an area IS subject to freezing then a dry system MUST be used.
There are some who specify this, but after doing much research I came to the conclusion that it simply ain't in the code that way. As you say, the 30% increase in remote area is to compensate for the delay in application of water. As others have said, get him to show you the exact code reference to back up his position, not the way he wishes the code read. Then again, sometimes that just p1$$3$ some AHJs off. Eric J. Shelton, PE Senior Fire Protection Engineer Hankins and Anderson Consulting Engineers 4880 Sadler Road Suite 300 Glen Allen, VA 23060 v: (804) 285.4171 f: (804) 217.8520 http://www.haengineers.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Greg McGahan Sent: Saturday, July 28, 2007 11:57 AM To: [email protected] Subject: RE: Dry System with Pendents 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) _______________________________________________ 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)
