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Re: HSS thin gage section properties

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All other things being equal, you can't develop more strength than the base
material of the thinnest part will allow. AISC 360-10 identifies thinnest
(fillet) welds per material thickness but does not prevent the use of 
larger welds. A qualified weld procedure mitigates for issues such as 
burn-through and enbrittlement. Ye olde AISC ASD 9th was not so clear but 
intended the same.

Also, as Oshin points out, thin material may require compliance to D1.3
rather than D1.1 and probably use filler and equipment that are not 
normally stock in a structural weld shop.

Paul Ransom, P.Eng.

> Date: Tue, 11 Feb 2014 09:03:33 -0800 (PST)
> From: Oshin Tosounian <oshin(--nospam--at)>
> Subject: Re: HSS thin gage section properties
> Welding of sheet (3/16" thick or less) steel is covered in "AWS D1.3
> Structural Welding Code - Sheet Steel" You can download the general
> provisions chapter here: and
> table of contents is available here:
> Oshin Tosounian, S.E.

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