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RE: Tack-welding nuts of high strength bolts[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Tack-welding nuts of high strength bolts
- From: "Cummings, Thomas J." <tcummings(--nospam--at)GFNET.com>
- Date: Tue, 13 Jun 2006 11:13:41 -0400
I would strongly recommend against tack welding the nuts. Not only does this become a potential fracture problem, many bridge owning Agencies (I’m assuming an agency such as a DOT) prohibit this practice for their bridges.
Have you considered or discussed with your fabricator the use of blind bolts (a proprietary name that comes to mind is Huck Bolt)? I’m away from my office at the moment and don’t have access to my files for an address or contact number, but I’m sure you can find them in the web.
Hope this helps.
Thomas J. Cummings, PE
Manager - Bridge Design Practice
Gannett Fleming Engineers and Architects, P.C.
P: (212) 967-9833 Ext. 5244
F: (212) 268-6684
From: Garner, Robert
A bridge manufacturer has requested tack-welding nuts to a splice plate to make a blind connection of a HSS truss chord splice. The bolts are ASTM A325, Type 3 (plain) in a snug-tight bearing connection. Nut specifications are not given. The splice plate is ASTM A588 steel.
I would appreciate any opinions on tack-welding these nuts.
Bob Garner, S.E.
Moffatt & Nichol
Tel.: (619) 220-6050
Fax.: (619) 220-6055
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