The reason for using larger hangers is for hangers on CPVC pipe. Shooting CPVC pipe to a concrete deck using 2-hole straps causes the pipe to deflect because of the larger outside diameter of the fittings. This deflection is causing, or adding to other causes of, Environmental Stress Cracking. Using a strap one size larger than the CPVC pipe prevents this deflection.
Ryan Peterson Wayne Automatic Fire Sprinklers, Inc. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Minkel Sent: Wednesday, January 02, 2008 2:56 PM To: [email protected] Subject: RE: Hanger Size Question Why would you want to do that? I would use a 1" hanger for 1" pipe, 1 1/4" hanger for 1 1/4", etc. Bill Minkel, Designer Western States Fire Protection, Dallas NFPA Member #2578666 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ryan Peterson Sent: Wednesday, January 02, 2008 1:43 PM To: [email protected] Subject: RE: Hanger Size Question 2002, but 9.1.1.6 governs trapeze and I'm more concerned with general hanger size; such as, hanging 1" pipe with an 1 1/4" 2-hole strap. Ryan Peterson Wayne Automatic Fire Sprinklers, Inc. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Walsvik Sent: Wednesday, January 02, 2008 11:39 AM To: [email protected] Subject: RE: Hanger Size Question Are you using NFPA 13 2002? Or 2007? The requirements of 9.1.1.6 were changed in the 2007 edition. Matthew D. Walsvik, EIT Civil/Fire Protection Engineer Ulteig Engineers, Inc. 3350 38th Ave. S. Fargo, ND 58106/9615 Phone: 701.280.8700 Direct: 701.280.8694 Fax: 701.280.8739 [EMAIL PROTECTED] www.ulteig.com Confidentiality Notice This message may contain privileged and confidential information. If you think, for any reason, this message may have been addressed to you in error, you must not disseminate copy or take any action in reliance on it, and we would ask you to notify me immediately by return email to [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ryan Peterson Sent: Wednesday, January 02, 2008 9:44 AM To: [email protected] Subject: Hanger Size Question I thought I read that it was acceptable to install pipe using a hanger one pipe size larger than the pipe being installed but I can't seem to find it. Can someone remind me where I would have read it? Thanks, Ryan Peterson Wayne Automatic Fire Sprinklers, 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) _______________________________________________ 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) _______________________________________________ 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)
