And remember that FM is 1:1.4 suggesting that the adjusted ratio for each entity has to be equal to or greater than 1: 1.2 (NFPA) or 1:1.4 (FM).
On Tue, Apr 20, 2010 at 7:54 AM, Brad <[email protected]> wrote: > Something I overlooked until about 8 years ago: 1.2 x AREA USED--- > Example 1500 SF- min. length 46.5', maybe 4 heads---- 1590 SF- min. length > 48', maybe 5 heads! > > -----Original Message----- > From: Roland Huggins [mailto:[email protected]] > Sent: Tuesday, April 20, 2010 9:36 AM > To: [email protected] > Subject: Re: Calc Area > > counting sprinklers is ONLY a casual means to check to ensure you are > CLOSE to the required floor area. You must measure actual floor area > with no regard to sprinkler spacing or distance to wall. Now in > defining the area of coverage for each sprinkler, your question raises > a point often asked. In a non-symmetrical layout, you use the longer > on each side to define S and L such that the sprinkler is always in > the center of the imaginary box. Not well explained by the standard > since it mainly talks about distance to walls. > > Roland > > > On Apr 19, 2010, at 11:41 PM, George Medina Jr wrote: > >> >> If I am calculating a tree type system using the area/design method, >> and have several different lengths between sprinklers on a branch >> line. Would I use the longest length to determine the amount of >> sprinklers on a branch line. I have always used an average (which >> I've probably been wrong all these years). >> >> 1.2vdesign area >> S >> S= Distance between sprinklers on branch line >> >> >> >> 1.2vdesign area >> S >> S= Distance between sprinklers on branch line >> >> >> >> >> George Medina Jr. >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.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) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
