We have been allowed to use slotted strut with strut nuts, strut washers and channel washers. These systems were designed to be used together, and we've had no problem getting them accepted. If you were to use Std. washers, there might be some questions, but only if it was a support point. If your just passing thru a slot, and then the support is provided by a channel nut, captive in the channel, I wouldn't see a problem, since they "Grip" the channel and can't move. The hole in the nut is the support hole, not the slot in the channel.
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 Bobby Gillett Sent: Thursday, August 27, 2009 8:19 AM To: [email protected] Subject: RE: All thread rod vs. bolts This question came from a fellow employee, and he did mean through steel - the wrong section was quoted. But his question : is there a difference in between all thread rod and bolts and is this 1/16" ruling meant for all thread rod also. (Can trapeze hangers be slotted for all thread rod)? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, August 27, 2009 9:12 AM To: [email protected] Subject: Re: All thread rod vs. bolts That section is for Minimum Bolt Size for Concrete (9.1.3.10) Trapeze hanger criteria is addressed in section 9.1.1.6. In your question, we find the answer in 9.1.1.6.7, "Holes for bolts shall not exceed 1/16 in greater than the diameter of the bolt." Forest Wilson Cherokee Fire -----Original Message----- From: Bobby Gillett <[email protected]> To: [email protected] Sent: Thu, Aug 27, 2009 9:42 am Subject: All thread rod vs. bolts Questionable issue: NFPA 13, 2002 Edition: 9.1.3.10.2 Holes for bolts shall not exceed 1/16 in. (1.6 mm) greater than the diameter of the bolt. So here is the question - is there a difference in between all thread rod and bolts and is this 1/16" ruling meant for all thread rod also. (Can trapeze hangers be slotted for all thread rod)? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell <mailto:[email protected]> [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
