Really, deluge? Since many people freak out with wet systems and the potential of one sprinkler opening I can't imagine an architect or owner embracing a deluge system in this type of environment. Although if you tell them it's a sprinkler system like they've seen in the movies maybe they would think that as being OK.
Also there are spacing restrictions on discharge nozzles which are more restrictive than for wet systems, 10 ft horizontally unless the nozzle is specifically listed for spacing exceeding that amount. And in this type of environment under these conditions, I'd personally would never suggest using a smoke detector. Too many potential for false trips unless you cross-zone them by using Ion and PE types. Heat detection would be my first choice unless there would be some extenuating circumstances that would prevent their use. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Cahill Sent: Friday, December 03, 2010 9:34 AM To: [email protected] Subject: RE: difficult one For some reason this stuck in my mind, now I have an answer you might pursue. I think the deluge solution might have some merit. Often I think we forget to separate the 2 distinct functions of a sprinkler head. First and I do mean first it is a heat detector. Second it water distribution valve/device. The Code deals with both - heads within 12"....3x rule... I don't see a reason you can't get equivalent detection from some other device. Could even be a smoke detector as they are faster than heats. Next make sure the head distribution covers the floor with the minimum density. There isn't even a reason to locate the heads near the ceiling as long as the distribution is adequate. Probably a few, 4' or 5' above the floor would be adequate. And with a deluge you are getting extensive pre-wetting far in excess or standard wet, dry, PA systems. Now this isn't a sprinkler contractor solution as it is outside the Code. Will require a PE to be legal. And obviously AHJ agreement. Chris Cahill > > -----Original Message----- > From: Greg McGahan<[email protected]> > Sender: [email protected] > Date: Thu, 02 Dec 2010 16:46:25 > To:<[email protected]> > Reply-To: [email protected] > Subject: difficult one > > The situations is this: > > Preface - I have already exhausted the "you can't because" in trying to > convince him to run two lines exposed in this space. > > Light Hazard > Corridor / Lobby with a center section Sloped, exposed construction 8 > in on 12in - 20' in width > On each side the ceiling drops about 4' to smooth flat ceilings > > The architect wants to find a way to eliminate exposed pipe. He prefers > to use sidewalls on the vertical 4' sides which I told him we could not do.. > His question is can he install detection at the peak, use sidewalls as > described above with a deluge valve. > > Does anyone have any other creative ideas for this situation? > > Thanks, > Greg > -- Greg C. McGahan Living Water Fire Protection, LLC. 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 Fax 850-937-1852 _______________________________________________ _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
