Sent from my BlackBerry® wireless device -----Original Message----- From: "Thom McMahon" <[EMAIL PROTECTED]>
Date: Fri, 25 Jul 2008 15:00:29 To: <[email protected]> Subject: RE: beam strength for hangers Remember that 250# is a fat guy on a ladder, or actually a fat guy falling off his ladder, grabbing the sprinkler pipe to save himself from a broken neck, cause his boss gave him a safety harness and all the necessary gear, and fall protection training, but he thinks he doesn't need it to just run up the ladder and tighten a leaking head. (This in no way reflects on, or is in ref. to Tom D.) The five times is just a safety factor, same as you 10% or 10Psi in the Hyd. Calc. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matt Willis Sent: Friday, July 25, 2008 1:28 PM To: [email protected] Subject: RE: beam strength for hangers >But that didn't answer your question. In my opinion NFPA-13 only applies to the hanger assembly itself. Does that mean the sprinkler designer is off the hook ?. By no means >someone has to do the load calculation otherwise the application is incomplete. Exactly. The paragraph I mentioned (9.2.1.3) pertaining to the Building Structure in 13 has been used to make the sprinkler contractor hire a structural engineering firm to provide proof that we were in compliance with Chap 9 of Our standard. In Todd's situation.. the hanger has to meet 5 times plus 250. Since it is not listed under the section for Building Structure in 13, the 5 times does not need to be added, only the weight plus 250. R/ Matt _______________________________________________ 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) No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.6/1572 - Release Date: 7/25/2008 6:51 AM _______________________________________________ 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)
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