The 250# is also for permanence and durability. During and after installation, people grab the pipe to balance themselves, move scaffolding, do pull-ups etc. Even if the "tie off" justification were refuted in a proposal to remove the 250#, the TC would still keep it.
J. Scott Mitchell, P.E. --- On Fri, 4/10/09, Thom McMahon <[email protected]> wrote: From: Thom McMahon <[email protected]> Subject: RE: Hangers vs. structure to hang from To: [email protected] Date: Friday, April 10, 2009, 3:02 PM I would give them the "Actual" weight of the water filled pipe, and just note that your hanger materials shall be in accordance with chapter 9 NFPA 13. The structural safety factors and point loads are the structural engineers responsibility. Just a adjunct to your question, Why do we have to allow the weight of the pipe + 250# (Weight of average fitter?) to our loads, when OSHA doesn't allow tie off to anything but the structure, and that has to handle impact loads of over 3000#? Isn't someone just as likely to tie off to a 1/2" insulated copper water line as to our pipe, if they're not following OSHA to begin with? 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 _______________________________________________ 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)
