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RE: Welding nut to anchor rod[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Welding nut to anchor rod
- From: "Carter, Charlie" <carter(--nospam--at)aisc.org>
- Date: Thu, 11 May 2006 09:33:29 -0500
Title: Welding nut to anchor rod
Yes. Or, one can also damage the threads to prevent turning.
From: Bill Allen
Are double nuts an acceptable alternate to tack welding a single nut?
The bottom feeders I work with hate tack welding.
T. William (Bill) Allen, S.E.
This recommendation is for the nut embedded in the concrete at the bottom of an anchor rod used in the threaded/nutted bottom configuration (not a headed rod). It is based upon field experience with installation of the nut at the top on such rod configurations. It is relatively easy to break the bond and spin the whole rod in the embedded nut. A simple tack weld of the nut to the projection of the rod below the nut will help prevent this, since it make the assembly function more like a headed rod when the top nut is installed.
Al [PTS] [mailto:AGFO(--nospam--at)chevron.com]
The following sentence is on Page 14-10, of the Steel Construction Manual, 13th edition, in a paragraph about anchor rods: "The nut should be welded to the rod to prevent the rod from turning out when the top nut is tightened."
With respect to F1554-99 anchor bolts, does anyone know what the above statement is based on, i.e., theory, tests, opinion, what???
Thanks in advance.
Al Greene, PE, SECB
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