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RE: HAS Weld Symbol

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There is more than what I present here.
There are 2 general types of testing.  There is testing done for "Qualification" and for "Production".  "Inspection" is a separate item. 
Qualification requires bending 10 studs with a pipe or hammer 30 degrees back and forth until the stud fails.  The failure is supposed to be in the stud and not the weld. 
Production requires that at the start of each shift or day's work 2 studs are to be bent 30 degrees. 
Inspection may required bending a stud at his discretion 15 degrees. 
The Harold Sprague method is to take a sledge hammer and bang it on the studs as I walk.  You should hear a ping when it hits.  If you hear a thud, you probably have a bad weld.  Bang on it to bend it to about 15 degrees. Bend about every stud when you feel frustrated about one thing or another.  About 1 in 10 is if you are feeling feisty and overly exposed to rap music.  About 1 in 20 if you are in a mellow Mantovanie mood.  As you can tell it is arbitrary unless your specification is more restrictive. 
Another good source is:

Harold Sprague

Subject: RE: HAS Weld Symbol
Date: Wed, 7 May 2008 10:48:31 -0600
From: GordonGoodell(--nospam--at)
To: seaint(--nospam--at)

Harold Sprague wrote:

“The critical thing is the testing.  This should always be required.  The testing will also determine if the stud has the appropriate CE.  This is more important with welding DBA's as opposed to welding rebar.  Also, I just like hitting things with a hammer.


How does this test work?  I remember when studying composite design my professor said, “The requirement is to hit the stud with a 10# hammer, and if it’s still there it passes.”  Is it really that simple?  I don’t have AWS D1.1, but I assume you have to test some percentage of the studs.  Sounds like a fairly destructive testing method; are you really trying to break it off, or just listening for the ring?




Gordon Goodell

Driggs, Idaho

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