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AW: Choice between intermittent and continuous fillet weld in Crane girder ( I beam with channel top)

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Christopher is totally right.
Usually there is a fatigue problem with crane girders and welding ends will
cause cracks. So I would also prefer continuous welding in any case with
fatigue.

Regards 

Alfred Mueller
International welding engineer
hmb engineering, germany

-----Ursprüngliche Nachricht-----
Von: Christopher Wright [mailto:chrisw(--nospam--at)skypoint.com] 
Gesendet: Montag, 8. Oktober 2007 20:30
An: seaint(--nospam--at)seaint.org
Betreff: Re: Choice between intermittent and continuous fillet weld in Crane
girder ( I beam with channel top)


On Oct 8, 2007, at 11:58 AM, Sanjay Verma wrote:

> Fabricator is insisting in providing intermittent fillet weld in  
> Crane girder (I-beam with channel top).
Each end of a weld is a perfect place for crack initiation. The  
fillet size is smaller, there's the possibility of arc strikes and  
similar defects especially when the current is stopped suddenly.  
Stitch welding makes more ends and greatly increases the possibility  
of flaws and subsequent fatigue failures. Maybe you could make your  
fabricator a counter offer that you'll buy the stitch welding if he  
pays for the additional strength calculation and drawing changes and  
does an LP or MP check on each individual weld.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)skypoint.com   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania  
1864)
http://www.skypoint.com/~chrisw/



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