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RE: Welding Anchor Bolts

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AISC Volume II, page 2-45 says that plug welds should not be subject to
tension stresses.

Roger Davis
SDS Architects, Inc.

-----Original Message-----
From:	MSSROLLO(--nospam--at) [mailto:MSSROLLO(--nospam--at)]
Sent:	Wednesday, December 30, 1998 6:02 PM
To:	seaint(--nospam--at)
Subject:	Re: Welding Anchor Bolts

It has been my understanding that plug welds were not considered suitable
transferring tensile forces due to the uncertainty of the penetration into
member behind the plug.  I beleive it may be acceptable for low stresses,
however, it may not be for high stresses.  Has anyone else ever heard this?

I have used them on low-stress bolts to achieve missing thread engagement,
not anchor bolts that are maxed out in tension, with little thread
The next problem I beleive is the requirement that the hole for plug welding
be at least 5/16" or more larger than the thickness of the plug piece.  I
think nuts are generally as thick as the bolt diameter.  Therefor the nut
thickness equals the hole diameter.  As you engage more threads, you lessen
the plug thickness.  It seems you would need at least 3/8" of thread
engagement.    Does anyone else read the code this way?

Ron Martin