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RE: Tack Welds

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Title: RE: Tack Welds


The erection drawings are very clear, the bridging/joist connections were supposed to be 1/8 in. fillets welds, 1/2 in. long.  We have not found any such welds in the remaining original construction, only "four 1/8 in. diameter tack welds".  Therein lies the problem!


-----Original Message-----
From: Christopher Wright [mailto:chrisw(--nospam--at)]
Sent: Monday, June 23, 2003 11:07 AM
To: ?
Subject: RE: Tack Welds

> That is why the tack welds have become very
Are these welds actually tack welds or a line of stitch welding? The
distinction is paramount. If they're actually tack welds, they were made
to maintain alignment prior to final permanent welding. Stitch welds
(more correctly intermittent welds) are final permanent load-bearing

An intermittent weld detail will be called out on a drawing--tack welds
won't be. If all you have is tack welds, it's convincing evidence that
someone failed to make the final welds or that someone else forgot to
detail the connections. Hard to imagine that someone went to the trouble
of designing a lateral bracing system without at least hinting around at
the connections.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)

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