How far are you to Wall Drug? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jimmy Waite Sent: Tuesday, November 04, 2008 12:30 PM To: [email protected] Subject: RE: Attic Rule
Todd, you're right about the small space. The distance along the slope is only 10 feet. If I max the head 7'-6 off the eave, I'll be covering 2'-6 the other direction (obviously). I am also only spaced 8 feet perpendicular to the slope. At that spacing I'll be 2'-11 from the top of the joist, and 2'-0 from the bottom. I'll also be 1'-5 horizontally away from the wall. We're this simply a peaked ceiling I'd meet all the requirements, but since it's a combustible concealed space a wrench is thrown in my plans. Jimmy -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - FPDC Sent: Tuesday, November 04, 2008 10:17 AM To: [email protected] Subject: Re: Attic Rule Jimmy, I would assume that there is no engineer to throw this question back on. I have looked at some similar situations and have used a couple of approaches: First, I try to get them to fill the space with insulation, thus eliminating the need for sprinklers. Next I try to take a practical approach and see what it would take to flood the space and get coverage. The typical spacing rules are probably out the window, because you physically can't meet all on them. I don't know how long this space is, but it sounds similar to the canopies on strip malls. I tend to keep the deflector distance and distance from the peak within code, make sure the single sprinkler can get water to the entire cross-section of the space and shrink the sprinkler spacing (8-10 ft instead of 12-14). If a single sprinkler goes off in this space, it is probably going to flood it in a matter of seconds. The previous being said, each situation has to be looked at individually and what works in one might not in another. You'll have to spend some time trying to figure out what is going to happen. (yes, that is a disclaimer) It would be also good to talk with the AHJ about it. You want to make sure he is on board. Todd At 11:38 AM 11/4/2008, you wrote: >Dear Forum Members, We are working on a retrofit for a church. The >building is entirely wood construction, built with large glu-lams and 14" >composite trusses (parallel to the glu-lams). We are protecting a small >cold space above a balcony. The roof pitch is 12 in 12, and the cold space >dies into a full height wall. So the space is a right triangle (with the >slope being the hypotenuse), instead of a typical attic and a typical peak. >8.6.4.1.4.2 (07) says I have to have a head within 12" of the bottom of the >top chord (TJI). First, does this rule still apply when I don't have a two >slopes to protect? Secondly, if this rules does apply, I'd have to add a >second line (in a very small space) and I couldn't maintain 6 feet between >heads, while still being more than 5 feet from the eave? Please help. > > >Thanks > >Jimmy Waite >Burtell Fire Protection >406-652-7697 >[EMAIL PROTECTED] > > >_______________________________________________ >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ 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)
