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RE: Upset Rods

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I don't know what the materials are, but I presume it is weldable.  The
welding is not a bad option if you stress relieve, grind, and NDT inspect
the welds.

Regards,
Harold Sprague, P.E.
The Neenan Company
2620 E. Prospect Ave., Suite 100
Fort Collins, CO 80525
voice 970-416-7298
fax 970-493-5869
harold.sprague(--nospam--at)neenan.com


-----Original Message-----
From: Fredericks, Douglas/SAC [mailto:DFreder1(--nospam--at)CH2M.com]
Sent: Friday, January 29, 1999 4:23 PM
To: 'SEAOC Mailing List'
Subject: Upset Rods



Hello Listers:

I have a project to replace 1" square rods with threaded, circular upset
ends on a 100 year old pin connected truss.  I'd like to make the historical
folks happy and replace the member with a new upset ended rod.  This would
be performed by heating the end of a new rod to 1900 degrees and forging it
in a form.

The other option would be to full pen weld a rod to another rod with a
slightly larger  diameter and grind the connection between the two pieces to
look like an upset end.  

Both procedures have advantages and disadvantages.  Welding seems simpler
but the forging process is more historically appropriate.  Either process
heats up the member and introduces secondary stresses, but I'm somehow more
comfortable with the welding.  Welding is also cheaper and no one except me
and the welder would know the difference.

Any thoughts?