Group There is a PI (Public Input) to Hanging and Bracing in regards to trapeze hangers. I am trying to get some information in regards to how other contractors are doing trapeze hangers and whether there have been issues. We primarily use angle iron when installing trapeze hangers. In that angle iron we have slots cut to attach to the bar joists. This is because the joists are never "perfectly" installed and the joists can be "wavy". We install the trapeze member with ATR, nuts and washers supported through the slot. I have pasted the PI language below. Your opinions are welcome and will probably be used in the committee meeting.
9.1.1.7.7 Holes for bolts or rod shall not exceed 1⁄16 in. (1.6 mm) greater than the diameter of the bolt. Statement of Problem and Substantiation for Public Input The referenced term bolt also applies to all thread rod used commonly to support fire sprinkler piping. Slots in the trapeze member may weaken the member. Like fire to a structural member, the size of the slot permitted? - "it depends" due to the number of variables. The permitted slot size based upon the structural member has not been verified prior the submission date of this public input. Peter Schwab VP of Purchasing & Engineering Technologies Wayne Automatic Fire Sprinklers Inc. 222 Capitol Court Ocoee, Fl 34761 Mobile: (407) 468-8248 Direct: (407) 877-5570 Fax: (407) 656-8026 www.waynefire.com Celebrating over 34 years of life safety _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
