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Welding to 1 3/4" Thick Flange

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MtnManBob

MtnManBob

Structural
Joined
May 23, 2003
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16
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US
Hi Guys, have a project where will be welding to existing W 12x190 column. Has a 1 3/4" thick flange. Will welding require preheat?
 
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Do it anyway, even if the rules don't require it. Not less than 225°F for carbon steel. Are you butt welding two ends together, or just an attachment? (Because preheating is not just for heat-affected zones.)
 
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brimstoner, will be attaching 5/16" or 3/8" thick connection angles to flange, no butt welding.
 
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Yes, I would locally preheat to 200 deg F.
 
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