>From what I have understood, this requirement is applicable (even for steel pipe), only if the hanger and support system is designed. If listed hangers are used, and the spacing complies with the code, it does not necessarily mean that that this requirement is satisfied. Maybe, someone should check it someday. So before the fitter starts his/her morning regimen, it would be advisable to check whether the supports are the cookie-cutter type.
Tony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Todd Williams Sent: August 4, 2009 9:10 AM To: [email protected] Subject: RE: trapeze hanger, PVC Something to think about. Hangers are designed to take 5x wt of water filled pipe +250 lbs. The 250 is supposedly to support a fitter if he had to grab on to it in an emergency (or so I have been told). Has anyone looked into if CPVC pipe could support a 250 lb person, even with hangers designed for it? At 10:54 AM 8/4/2009, you wrote: >Why not just calculate the modulus using the methods in NFPA 13 and >then size your trapeze pipe accordingly. Or, as George said, use the >values for steel and just have some oversized trapeze bars. > > > Assuming CPVC weighs less than steel pipe, use values for steel and > > you're safe. If you're near a head, make sure you're protecting > > against upward movement if needed. > > > > When we get into bar joist construction, we often switch to steel > > since hanging issues often make it a better installation all around. > > > > glc > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of > > [email protected] > > Sent: Tuesday, August 04, 2009 9:03 AM > > To: [email protected] > > Subject: Re: trapeze hanger, PVC > > > > Greg, > > If you are in a position to require trapeze hangers on cpvc,maybe > > you need to reconsider using steel pipe for stability and rigidity.Just a thought. > > ---- Greg McGahan <[email protected]> wrote: > >> Have we ever discussed the use of trapeze hangers for cpvc piping? > > Specifically, modulus requirements etc? > >> > >> Greg McGahan > >> Operations Manager > >> > >> Living Water Fire Protection > >> 1160 McKenzie Road > >> P.O. Box 877 > >> Cantonment, Florida 32533 > >> (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 > >> [email protected] > >> > >> > >> _______________________________________________ > >> Sprinklerforum mailing list > >> 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) > > _______________________________________________ > > Sprinklerforum mailing list > > 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) > > > > _______________________________________________ > > Sprinklerforum mailing list > > 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) > > > > >-- > > >_______________________________________________ >Sprinklerforum mailing list >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list 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) _______________________________________________ Sprinklerforum mailing list 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)
