Residential sprinklers must be on a wet system. Residential sprinkler rules don't apply in dry systems
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon Sent: Monday, April 30, 2007 1:53 PM To: [email protected] Subject: Re: How Much Dry Floor Area? Joe: I understand what the current standards say, Its the 96 that is causing the problem, in chapter 5. He doesn't care what the new standards say, since the 96 is what he uses. Just wondered if anyone who still uses 96 had any answers. Thom McMahon Firetech, Inc. 2560 Copper Ridge Dr Steamboat Springs, CO 80488-2136 Tel: 970-879-7952 Fax: 970-879-7926 ----- Original Message ----- From: "Joe Burtell" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, April 30, 2007 11:40 AM Subject: RE: How Much Dry Floor Area? > Area reductions do not apply to dry systems. Second, the 4 head rule is > under 11.2.3.5 Residential Sprinklers. So unless it's a listed residential > sprinkler, I don't see how you can apply the 4 head rule to QR heads. > > Joe Burtell, SET, CFPS > Burtell Fire Protection, Inc. > [EMAIL PROTECTED] > www.burtellfire.com > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Thom > McMahon > Sent: Monday, April 30, 2007 11:35 AM > To: [email protected] > Subject: Re: How Much Dry Floor Area? > > Bill: > > 2007 discusses the shadow area and I think the area allowed for Res. is 6 > SF, if you attended Roland's and Chris's presentation on the 2007 > standards > at convention last Sept. this was in the notes. > > New Question: > Residential 13 occupancy. With residential heads this is a 4 head design, > however I have had an AHJ say that even if you use QR in a Residential > occupancy that it stay's a 4 head design. I've always used room design or > area density in residential occupancy's for which we had to use QR heads > for > > some reason. Have I been wrong all these years? > > Example: Needed to run a dry attic location to feed QR dry Pend. in > residential occupancy. 10 foot ceilings we use 900 Sf and increase by 30% > for dry. He say's that we only needed to calc 4 heads, and uses NFPA 13, > 1996 Fig. A-5.3.2.2 "Examples of design areas for dwelling units." > Shows 4 heads different configurations. > > Any thoughts? > > Thom McMahon > Firetech, Inc. > 2560 Copper Ridge Dr > Steamboat Springs, CO 80488-2136 > Tel: 970-879-7952 > Fax: 970-879-7926 > ----- Original Message ----- > From: "Brooks, Bill" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, April 30, 2007 9:30 AM > Subject: How Much Dry Floor Area? > > >> Another obstruction question related to residential sprinklers. >> >> Figure 8.10.7.2.1.4 (2002) shows a sprinkler obstructed by a column. >> Assume >> a 16' x 16' coverage area from a sidewall residential sprinkler and a 12" >> x >> 12" column located 4' from the face of the column. I calculate a 29 sq >> ft >> shadow area behind the column. >> >> Is this a correct interpretation of the Figure? If so, is it possible to >> shift this shadow area to another part of the room to show equivalent >> protection? Is it appropriate to have 11% obstructed area in a 16' x 16' >> room? >> >> Since I'm on the subject of obstructions, what method should be used to >> cover bunk beds? Is furniture excluded? Bunk beds were last mentioned >> here >> in October 2002 but not with respect to the obstruction hazard. >> >> Bill Brooks >> Pittsburgh, PA >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> To Unsubscribe, send an email to:[EMAIL PROTECTED] >> (Put the word unsubscribe in the subject field) >> >> > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
