A butt joint is used to join two flat steel plates at a 90-degree angle when one plate is lying flat on the workbench and the other is centered upright against it.
Butt joint would be the type of joint used to join two flat steel plates at a 90-degree angle, with one plate lying flat on the workbench and the other centered upright against it. In a butt joint, the two ends of the plates are butted together and welded to form a right angle.
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