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RE: Cutting structural steel at site

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It should have no effect.  If you go into a modern structural shop, you will find any number of operations performed by cutting either with acetylene or plasma arc.  Some shops burn holes for bolts with plasma.  Most plate stock of any length is cut with acetylene track burners.  Complicated parts are often cut with multi-head burners using acetylene. 
 
The only difference is that the cut in the field will be more ragged because it will be done my hand.  Have them dress the cut with a grinder, and it will look fine.  If the welding bothers you for aesthetics, have them drill it with a mag drill or blow a pilot hole and have them ream the hole to size.   

Regards, Harold Sprague






From: johnenader(--nospam--at)hotmail.com
To: seaint(--nospam--at)seaint.org
Subject: Cutting structural steel at site
Date: Fri, 31 Oct 2008 13:16:14 +0100

A girt that is attached to a column via steel plates is too long.
 
The contractor is requesting cutting the welded  plate at one end by torching it.  The girt will also be cut by a torch to the required length.  The girt will  be welded to the plate and then will be connected  to the column by bolts.
 
 
What are your thoughts please about torching the end of the girts where the lateral loads will pass thru the torched cross section to the column.
 
Or what is the loss to the steel grade.
 
 
Thanks,
 
John
 
 




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