Typically when hanging from a 4x2 truss member, you need to contact the truss mfgr and find out where along the truss you can attach your hanger. Often it is near or at panel points. You can't always just attach at any point along the horizontal member.
Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Monday, October 03, 2011 11:09 AM To: [email protected] Subject: Pipe hangers for open wood truss NFPA 13 07ed (9.1.5.6.1) requires that screws in the side of timber be installed not less that 2.5" (3" for mains) from the bottom edge. If the top chord of the truss is a 2x4 on it's side then it is only 1.75" thick. How has the forum complied with this restriction in the past? The AHJ I am dealing with will not accept Sammy side winders for wood since they only show a TJI, not a truss, when installing in this fashion. One option I was thinking of was to lag bolt a piece of unistrut through 2X4 blocking up into the top chord of the wood truss. This way I would get my required thickness to use 1/2"x3" lag bolts for 4in mains. Thanks, Dewayne -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20111003/4bdf3c9f/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
