Put the head up in the 'ceiling jet', which is 12" deep for unobstructed construction, and put the water on the floor (pattern unobstructed).
-----Original Message----- From: Todd - FPDC [mailto:[email protected]] Sent: Tuesday, February 09, 2010 8:07 AM To: [email protected] Subject: Re: Beam obstruction rules I'm with you. Doesn't make sense. Sent from my iPhone On Feb 9, 2010, at 8:48 AM, "Cliff Whitfield" <[email protected]> wrote: > George & everyone, > > I guess I made this more complicated than it is. This guy basically > thinks > that even when you locate the head so that it is in compliance with > the beam > rule table and the beam does not block the discharge of the head, > you still > treat the beam as if it were a wall and you can't space the head on > the > other side of the beam more than 7'-6" off of the beam. Does this > seem > correct to you? > > In my opinion, once you meet the beam blocking rule, the beam does > not exist > in terms of head layout and spacing. Am I way off base here? > > Cliff > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > George Church > Sent: Tuesday, February 09, 2010 4:44 AM > To: [email protected] > Subject: RE: Beam obstruction rules > > Spot on- and why we have prescriptive codes to apply- you did- he > nneds to > understand you comply and that's it, absent clear and present danger, > contractual obligations... > > glc > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ed > Kramer > Sent: Monday, February 08, 2010 6:38 PM > To: [email protected] > Subject: RE: Beam obstruction rules > > Let me guess: he doesn't have an issue with sprinkler spray > obstruction, > but has an issue with heat flow getting to the sprinkler. Assuming > that's > the case, he may (or may not) have a point - your beams are 15" deep > and > heat would more likely flow parallel to the beams rather than cross > under > the beam & fuse the sprinkler. To my knowledge, 13 doesn't address > that. > Unless someone wants to do some fire modeling, it's all opinion and > theory. > > Ed Kramer > Littleton, CO > >> -----Original Message----- >> From: [email protected] >> [mailto:sprinklerforum- >> [email protected]] On Behalf Of Cliff Whitfield >> Sent: Monday, February 08, 2010 4:02 PM >> To: [email protected] >> Subject: RE: Beam obstruction rules >> >> Todd, >> >> There are no lights or fans or ducts that would create an issue. The >> deflector is 6" below the deck so I only have 9" to worry about. I'm >> trying >> to not say exactly what this guy has said so that I can get other >> opinions >> before I influence anyone's answer. >> >> If anyone else wants to throw in their two cents, that would be >> great. >> >> Thanks, >> Cliff >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Todd >> Williams >> Sent: Monday, February 08, 2010 3:59 PM >> To: [email protected] >> Subject: Re: Beam obstruction rules >> >> How far down is the deflector from the deck? Any lights/ceiling fans >> that could be in the way? >> >> >> At 04:39 PM 2/8/2010, you wrote: >>> Forum, >>> >>> I have a question regarding beam obstruction rules for standard >>> spray >>> uprights. >>> >>> I have a light hazard project that has 15" deep beams. The first >>> beam >> is >> 9' >>> from the wall and the next beam is 17' away from beam #1. If I >>> space >> my >>> first head 5' away from beam #1 so that it is not an obstruction >>> (per >> table >>> 8.6.5.1.2-NFPA 13, 2007 ed), can my next head be 15' from head #1? >> This is >>> not supposed to be a trick question but I have a disagreement with >>> an >> FPE >> on >>> this. >>> >>> Thanks for your insight on this one. >>> >>> Cliff Whitfield, SET >>> President >>> Fire Design, Inc. >>> >>> [email protected] >>> www.fire-design.com >>> >> >> _______________________________________________ >> 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:Sprinklerforum- >> [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:Sprinklerforum- > [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:Sprinklerforum- > [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:Sprinklerforum- > [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) _______________________________________________ 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)
