It's a function of the code classification. If it's R-2, then it's not a building separation because the occupancy group would otherwise be R-3. And one of the code changes in September (RB-66) de-rated the required separation as part of the mandatory sprinkler upgrade. The 2006 code requires TWO hours between single family townhomes.
Steve Leyton Protection Design & Consulting San Diego, CA Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "IPA" <[EMAIL PROTECTED]> Date: Tue, 18 Nov 2008 18:19:38 To: <[email protected]> Subject: Re: 13R system with individual risers calc to 13D? Actually, there is a one-hour firewall between both halves of the units which would separate them into two units (one on top, one on bottom) but is this the same thing as a 'separation wall' which would make them two separate buildings under the code? On Tue, Nov 18, 2008 at 6:27 PM, <[EMAIL PROTECTED]> wrote: > IBC 903.3.1.3 permits 13D systems in one- and two-family dwellings.� The > definition of a dwelling (IBC page 14) is a building that contains one > or two dwelling units.� Unless you have a building separation wall in > there somewhere it looks like the 13D approach would be prohibited by > 2006 IBC.� I don't think the floor would count as this separation.� 13R > systems are installed in "buildings of Group R".� You seem to be dealing > with a building of Group R with four dwelling units, not a dwelling with > a maximum of two dwelling units.� Therefore R not D. > > Just my reading, others may differ. > > Bill Brooks > > William N. Brooks, P.E. > Brooks Fire Protection Engineering Inc. > 372 Wilett Drive > Severna Park, MD 21146 > 410-544-3620 Phone > 410-544-3032 FAX > 412-400-6528 Cell > > -------- Original Message -------- > Subject: Re: 13R system with individual risers calc to 13D? > From: Roland Huggins <[EMAIL PROTECTED]> > Date: Tue, November 18, 2008 6:21 pm > To: [email protected] > > What does the IBC say? If there were townhouses (not since units > divided per floor), then a 13D could be used with minimal rated > separation per the IRC. The code drives the allowed type of system, > not how small you make each individual system. Make sure the tamper > switches are electrically monitored so it is known when one of the > risers in the middle of the building is shut-down. > > Roland > > On Nov 18, 2008, at 11:26 AM, IPA wrote: > > > I have a residential complex consisting of two story units with two > > individual units per floor. Obviously this would fall under 13R > > however in > > this case the owner wants each unit to have it's own seperate riser > > control, > > it's own underground feed etc... each unit is 100% independant from > > the > > others. In this case could this system be calculated to 13D criteria > > (2 head > > calc) seeing how each system is serving only one family's unit? What > > do you > > think? > > > > Thanks, > > _______________________________________________ > > Sprinklerforum mailing list > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > <http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum> > > For Technical Assistance, send an email to: > [EMAIL PROTECTED] > > > > To Unsubscribe, send an email > to:[EMAIL PROTECTED]<[EMAIL PROTECTED]> > > (Put the word unsubscribe in the subject field) > > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > <http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum> > For Technical Assistance, send an email to: > [EMAIL PROTECTED] > > To Unsubscribe, send an email > to:[EMAIL PROTECTED]<[EMAIL PROTECTED]> > (Put the word unsubscribe in the subject field) > > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > <http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum> > For Technical Assistance, send an email to: [EMAIL PROTECTED] > > To Unsubscribe, send an email to:[EMAIL PROTECTED]<[EMAIL PROTECTED]> > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum <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) � __________ Information from ESET NOD32 Antivirus, version of virus signature database 3623 (20081118)__________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com <http://www.eset.com> �
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