I think the earlier response is the issue. There is no room to get over to the area to be protected, hence spray the area with the sidewall. I've wanted to do it on several occasions, but just didn't seem right. There are pendant heads protecting the area behind the sidewall. so the alternative is run thru the duct to get your protection with a pendant.> From: [email protected]> To: [email protected]> Date: Mon, 5 Jan 2009 11:47:57 -0700> Subject: RE: Sidewall Sprinklers> > Activation is most likely not the issue but pattern of discharge. At the wall there is no real need for discharge in more than one direction as opposed to a pendent or upright in the middle of a room where you're seeking a 360 degree field of discharge.> > Same deal for the sidewall under the garage door. Beyond the door the ceiling sprinks do their job, SW is only concerned with one direction, the space below the door.> > > Craig L. Prahl, CET > Fire Protection Specialist> Mechanical Department> CH2MHILL> Lockwood Greene> 1500 International Drive> PO Box 491, Spartanburg, SC 29304-0491> Direct - 864.599.4102> Fax - 864.599.8439> [email protected]> http://www.ch2m.com > > > -----Original Message-----> From: [email protected] [mailto:[email protected]] On Behalf Of George Church> Sent: Monday, January 05, 2009 1:44 PM> To: [email protected]> Subject: RE: Sidewall Sprinklers> > I'm not a PE nor do I play one on TV. But I've seen James' fire videos, so I'm ahead of most plumbing designers:)> > Caveats aside, I think activation depends on heat banking down from the ceiling, and in order to get a head to throw 24' it has to go off- and that's a long way for heat to go without a backdrop to stop heat from continuing to the next SSP below a flat ceiling. The "wall" or soffit behind the SW will stop that heat from continuing past it and turn it toward the thermal element. Heat Creep?> > I've never been a fan of protecting a 48' wide area by ECHSW on opposing walls. Wouldn't think there'd be much life safety offered. > > glc> > -----Original Message-----> From: [email protected]> [mailto:[email protected]] On Behalf Of A.P.Silva> Sent: Monday, January 05, 2009 1:32 PM> To: [email protected]> Subject: RE: Sidewall Sprinklers> > I agree, the codes do not permit installation of sidewalls without a backwall/soffit/beam in any other situation. However, this is something I have often wondered myself. Granted, all closed sprinklers actuated by thermal elements require to be in proximity to a ceiling. The thermal elements in sidewalls are the same as pendents and uprights. So why would only sidewall also require a backwall? Is the acuation of sidewalls different from pendents and uprights? I think the originator of this post is asking a valid question.> > Tony > > -----Original Message-----> From: [email protected]> [mailto:[email protected]] On Behalf Of Roland Huggins> Sent: January 5, 2009 8:55 AM> To: [email protected]> Subject: Re: Sidewall Sprinklers> > The only exception to not having a wall, soffit, or beam behind them is when installed UNDER roll-up doors ( as allowed by 8.4.2 (3)> > Roland> > On Dec 31, 2008, at 11:37 AM, Dale Wingard wrote:> > > Duane,> >> > NFPA 13(2007) 8.7.4.1.2 addresses the location of vertical and > > horizontal sidewalls in relation to the wall that they are projected > > from.> >> > Sidewall sprinklers cannot be positioned in the center of a room as a > > pendant.> >> >> > Dale F. Wingard, SET> > Design Manager> > Triple "A" Fire Protection, Inc.> > 251.649.2034> > [email protected]> >> >> > -----Original Message-----> > From: [email protected]> > [mailto:[email protected]] On Behalf Of > > Johnson, Duane (NIH/OD/ORS) [C]> > Sent: Wednesday, December 31, 2008 11:34 AM> > To: [email protected]> > Subject: Sidewall Sprinklers> >> >> > Can a horizontal sidewall sprinkler be installed in the center of a > > room (flat, smooth clg) provided sprinkler coverage is added behind > > the sidewall? In other words, not installed near a wall or soffit.> >> > In reality a sidewall installed 4" to 6" below the ceiling (away from > > a> > wall/soffit) should activate in similar fashion as exposed pendents > > and uprights (1" - 12" below clg). If code permits "exposed"> > sidewalls to be installed below roll up doors without soffits, can't > > an "exposed"> > sidewall be installed elsewhere?> >> > Is there anything in the listing of a sidewall that requires the > > sprinkler be installed on a wall or soffit? Are there any ROP/ROC > > responses from the committee that would help answer the question?> >> > Thoughts?> >> > Duane Johnson, PE> > Program Manager> > Division of the Fire Marshal (Support Contractor) Office of Research > > Services National Institutes of Health> > 301-496-0487> > _______________________________________________> > Sprinklerforum mailing list> > http://lists.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> > http://lists.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> http://lists.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> http://lists.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> http://lists.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> http://lists.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 http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected]
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