This has not been brought up yet, but worth noting: 8.16.2.5.3 Auxiliary Drains for Dry Pipe Systems and Preaction Systems. 8.16.2.5.3.4 Auxiliary drains are not for pipe drops supplying dry pendent sprinklers installed in accordance with 7.2.2.
8.16.2.5.3.4 should also reference 7.3.2.5 in my opinion. The committee needs to amend this since 7.2.2 only covers dry pipe while 7.3.2 covers preaction. Duane Johnson Strickland Fire Protection -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Tuesday, March 17, 2015 1:26 PM To: [email protected] Subject: Re: Pendent sprinklers on return bends on a pre-action system It is addressed by NFPA 13 - see section 7.3.2.5(5) It is not a freeze issue since even with a return bend, it has to be in a heated area. It's a build-up of stuff issue (either silt from non potable water or scale). All these items are covered by the #5 allowance added in the 2007 edition that was posted and referenced above. Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Mar 16, 2015, at 8:03 PM, Sean Lockyer <[email protected]> wrote: > > Even though (non-dry) pendent sprinklers must be installed on return bends on > dry systems what about pendent sprinklers in a heated/conditioned space that > is protected by a double-interlock, pre-action system (such as a video > production room, etc.) ? > > Does the fact that it is above a conditioned ceiling space matter ? To my > knowledge there is nothing in NFPA codes or the manufacturers listing that > give you an allowance for special situations like this but I was wondering if > anyone else has any experience with this sort of issue ? > > I would like to hear everybody's thoughts.. > > > Sean Lockyer > Project Designer 4617 Parkbreeze > Court > Cell 386-279-1197 Orlando, > Florida 32808 > [email protected] Phone: 407-816-9101 > www.AITLifeSafety.com Fax: > 407-816-9104 > > > _______________________________________________ > 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
