We are required to comply with one ONE method allowed in 13. If the corridor calc rule applies, you are required to comply with that one in the corridor and nothing additional for that area.
In that case, it would be at a minimum, prudent to confirm that any other areas comply with 13 by doing what ever is appropriate using any ONE method - most demanding room, Area/Density method etc. In other words, If your corridor calc worked using 1" pipe, then I would always confirm that 1" pipe worked in the rest of the building. If I used the most demanding room method and 1" did not work and I had to upsize pipe, then I would use the 1" in the corridor and submit calcs for the Corridor, and use the increased pipe sizes in the MDR and submit that as well. If the 1" worked everywhere, I would submit the most demanding calcs documenting this. Once you meet ONE requirement for a given area, you are not REQUIRED by 13 to apply another for the same portion of the system. On Wed, Dec 7, 2011 at 8:39 AM, <[email protected]> wrote: > I'm saying you are not required to do it. > > > Ron Fletcher > Aero Automatic > Phoenix, AZ > > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Fairchild, Jack > Sent: Wednesday, December 07, 2011 7:38 AM > To: [email protected] > Subject: RE: Multiple design methods in one building > > I believe you are saying: Calculate the most remote area using the > appropriate method. > For example: A 1500 sq.ft. remote area in a corridor will probably be > more demanding that a corridor calculation, but because it is not an > appropriate method you don't do it. > > Jack Fairchild > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Wednesday, December 07, 2011 9:26 AM > To: [email protected] > Subject: RE: Multiple design methods in one building > > I am referring to the methods of determining a light hazard remote area. > Room design, area density and corridor are the ones I remember. Each method > is allowed and each will result in a different flow requirement. There is > no requirement to design the sprinkler system to the most demanding. > > > Ron Fletcher > Aero Automatic > Phoenix, AZ > > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Fairchild, Jack > Sent: Wednesday, December 07, 2011 6:59 AM > To: [email protected] > Subject: RE: Multiple design methods in one building > > Ron, > > Please clarify your statement. Which "methods" are your referring to? > Are you talking about Hazen-Williams vs. Darcy-Weisbach? > > > Jack Fairchild > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Wednesday, December 07, 2011 8:45 AM > To: [email protected] > Subject: RE: Multiple design methods in one building > > It also supports "not" requiring that the method resulting in the greatest > demand be used. In LH there are many methods of determining the remote area > but no requirement that the most demanding method be used. > > > Ron Fletcher > Aero Automatic > Phoenix, AZ > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Todd Williams > Sent: Wednesday, December 07, 2011 5:15 AM > To: [email protected] > Subject: Re: Multiple design methods in one building > > In the Handbook commentary, it states "It is possible for a combination of > design methods to be used in a single building". I perceive the purpose of > this section is to make it the designer's discretion on which approach to > use, so an authority cannot mandate something different after the fact > (unless specifically included as part of a job specification). I think you > are good mixing it up. > > > At 06:59 AM 12/7/2011, you wrote: > >Reading the following from NFPA 13 2010 ed. Does this mean the room > design method cannot be used in an area if we already used the density/area > method in another area? We have a residence with a mechanical penthouse > using the density/area method but the floors below are all residential > units separated by block walls. Are we be allowed to use room design method > for that? > > > > > >11.2.3.1.1 The water supply for sprinklers shall be determined > >*only from one* of the following, at the discretion of the > >designer: > >(1) Density/area curves of Figure 11.2.3.1.1 in accordance > >with the density/area method of 11.2.3.2 > >(2) The room that creates the greatest demand in accordance > >with the room design method of 11.2.3.3 > >(3) Special design areas in accordance with 11.2.3.4 > >-------------- next part -------------- > >An HTML attachment was scrubbed... > >URL: < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20111207/55489866/attachment.html > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, CT > 860.535.2080 > www.fpdc.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- Greg McGahan Living Water Fire Protection, LLC <http://www.livingwaterfp.com> 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 -------------- next part -------------- An HTML attachment was scrubbed... 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