Todd, I think the stud faces, if wood, would be at least one reason this wouldn't work.
On Fri, Apr 11, 2008 at 1:31 PM, Todd Williams - FPDC <[EMAIL PROTECTED]> wrote: > The GC figures he can pack a lot of mineral wool for the price of 90+ > sprinklers > > > At 04:06 PM 4/11/2008, you wrote: > > > Todd, Without sounding smug, wouldn't it be easier to install the > sprinkler ? > > > > John Drucker > > Fire Protection Subcode Official (AHJ) > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Todd > Williams - FPDC > > Sent: Friday, April 11, 2008 3:40 PM > > To: [email protected] > > Subject: RE: thermal barrier > > > > Do thermal barrier and fire resistance mean the same thing? You could put > sheet metal on metal studs and it would be a non-combustible construction > would have a certain resistance, but would not be a thermal barrier. The > definition in NFPA 13R give a certain definition to thermal barrier and the > handbook commentary gives notes basically what several people have said. > However, my situation is a little more complicated (are you surprised?) > > > > What I am working on is a 90-unit wood frame hotel with a 13R system. The > original design had a modular bathroom, which has been scrapped in favor of > a stick-built one. The way this is framed, a layer of sheetrock cannot be > installed behind the front and back of the tub (the side along the back wall > can be). The proposal has been made to fill the void space behind the > cast-iron tub with mineral wool. My question is does this provide the > required thermal barrier and how would I go about proving it? > > > > > > > > At 09:14 AM 4/11/2008, you wrote: > > >Double check that, usually you need "Type X" > > >5/8" to achieve the 1 hr. rating. According to the IBC it takes two > > >layers, staggered of 1/2" > > >each side to get a 1 hour rating. See Item > > >14-1.2 in Table 719.1(2). One layer of 5/8" > > >Type X on each side will also give 1hr, Item 14-1.3. > > > > > >You will most likely be within the 15 minute window with standard 1/2" > > >sheet rock over studs with no exposed combustibles. Make sure all > > >penetrations into the stud cavity are sealed with fire caulk. > > > > > >Thermal barrier is between the bathroom and the adjacent space. > > > > > > > > >Craig L. Prahl, CET > > >Fire Protection Group > > >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 Eric > > >Tysinger > > >Sent: Friday, April 11, 2008 8:47 AM > > >To: [email protected] > > >Subject: RE: thermal barrier > > > > > >Don't forget the thermal barrier is required behind the fixtures and > > >must extend to the floor even behind the bathtubs. If you need to prove > > >the rating (15min) a simple spec sheet on gypsum board should provide > > >that. Any UL fire rating details will show ½" gypsum on each side of a > > >metal stud wall as at least one-hour. > > > > > >Eric Tysinger > > >Design Manager > > >Wayne Automatic Fire Sprinklers, Inc. > > > > > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] > > >[mailto:[EMAIL PROTECTED] On Behalf Of Dewayne > > >Martinez > > >Sent: Friday, April 11, 2008 7:35 AM > > >To: [email protected] > > >Subject: RE: thermal barrier > > > > > >I believe a 1/2" sheet of gyp bd meets this criteria but you may want > > >to show him 13R (07)6.9.2. > > >The requirement for the thermal barrier has been removed. > > >Dewayne > > > > > >-----Original Message----- > > >From: [EMAIL PROTECTED] > > >[mailto:[EMAIL PROTECTED] > > >On Behalf Of Todd Williams - FPDC > > >Sent: Friday, April 11, 2008 6:04 AM > > >To: [email protected] > > >Subject: thermal barrier > > > > > >NFPA 13R includes an exclusion for sprinklers in bathrooms less than > > >55 sqft and where the walls behind fixtures "are of non-combustible or > > >limited combustible materials providing a 15-minute thermal barrier". > > >Is there any way to quantify if this criteria is met? A thermal barrier > > >to what? I have an AHJ questioning this. > > > > > >Todd G. Williams, PE > > >Fire Protection Design/Consulting > > >Stonington, Connecticut > > >www.fpdc.com > > >860.535.2080 > > >_______________________________________________ > > >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) > > > > Todd G. Williams, PE > > Fire Protection Design/Consulting > > Stonington, Connecticut > > www.fpdc.com > > 860.535.2080 > > _______________________________________________ > > 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) > > > > CONFIDENTIAL AND PROPRIETARY: > > This email message is intended only for the use of the individual or > entity to which it is addressed and may contain information that is > privileged and confidential, nor is it, unless specifically stated, intended > to be relied upon by any person or persons other than the individual or > entity named above and no warranties or representations are made or intended > to persons or entities not named above. If the reader is not the intended > recipient, you are hereby notified that any dissemination, distribution or > copying of this communication is strictly prohibited. If you have received > this communication in error, please notify us immediately by telephone, > return this message to the address above and delete all copies. Thank you. > > > > _______________________________________________ > > 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) > > > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 _______________________________________________ > 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) > -- Ron Greenman at home.... _______________________________________________ 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)
