From: Travis Mack, SET [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 21, 2008 5:58 AM To: '[email protected]' Subject: RE: Trapeze lengths beyond 10'-0"
I found an older spreadsheet that an engineer created for me a few years ago. It will give you the section modulus for any span and will figure weights for unequal loading. If anyone wants it, shoot me an email. I can't guarantee the accuracy, but it matches up pretty well with the values in NFPA 13. Travis -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - FPDC Sent: Tuesday, May 20, 2008 1:33 PM To: [email protected] Subject: Re: Trapeze lengths beyond 10'-0" Can you extrapolate from the table, I wouldn't. Can you calculate the required section modulus for a 14 ft trapeze span, yes. Would you want someone whose name ends in PE to sign off on it, definitely. . At 12:04 PM 5/20/2008, you wrote: >Forumites, > > > >I searched the archives and didn't find a discussion on this topic. > >Here's my question? > > > >Can I extrapolate out beyond the 10'-0" length on the section modulus >required for trapeze in table 9.1.1.6.1(a) '07ed.? > > > >A fitter called this morning wanting 14' trapeze hangers for 4" pipe. He was >placing the main in the wrong location but it brought up an interesting >question. I noticed that the section modulus has a linear increase with >trapeze length. > >For 4" Sch 10 y=.085x, where y=section modulus & x=Trapeze length. So, for a >14' trapeze for 4" sch 10, would a 1.19 section modulus work? > >Do I have to have the initials PE after my name to think these thoughts? > > > >Thanks, > > > >Randy Knutson > >Shilo Automatic Sprinkler, Inc. > >_______________________________________________ >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) _______________________________________________ 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)
