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
