If there is fine print in this catalog, it is a micro dot.
At 12:51 PM 6/21/2010, you wrote: >I have seen recently where the fine print on a load factor already included >the 250 plus 5x. In my case your 300# would actually be 1750# yielding 300# >useful for our intent. It wasn't what you are working on, just check the >fine print or talk to the mfg. Of course at 300#/5#/ft = 60 ft which is 4x >over designed if this is the case. > >Chris Cahill, P.E. >Fire Protection Engineer >Sentry Fire Protection, Inc. > >763-658-4483 >763-658-4921 fax > >Email: [email protected] > >Mail: P.O. Box 69 > Waverly, MN 55390 > >Location: 4439 Hwy 12 SW > Waverly, MN 55390 >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Todd Williams >Sent: Monday, June 21, 2010 11:40 AM >To: [email protected] >Subject: Hanger capacity > >I am having to go through some calculations on hangers to see if a >particular truss can handle the sprinkler pipe. The problem is >involving Sammys and since they are not specifically listed in NFPA >13 (2002), we need to do the calculations. My question has to do >with the swivel rings. > >Section 9.1.1.2 requires the 5x wt of water filled pipe + 250 lbs. >According to the PHD Manufacturing literature I have, a 2" swivel >ring has a design load is 300 lbs. If we deduct the 250, you have 50 >lbs left. Divide that by 5 and you get 10 lbs as the maximum weight >that can be supported. Since 2" water filled pipe weighs 5.17 lb/ft., >the maximum span a 2" hanger can support and meet the NFPA 13 >requirements is 1" - 11". Am I missing something here? > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, CT >860.535.2080 >www.fpdc.com > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.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 >[email protected] >http://fireball.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, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
