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Is there any guidance in AISI? Your weld may be governed by the light gage welding provisions with the 12 ga side of things.
For the 1/8" tubes, I always cautioned the welders to take it easy, so as not to put a hole in the side.
This is only true/required when welding on the edge of the material (and that material is greater than 1/4" thick). It is not true for something like a Tee Joint.WARose said:In AISC welding, we always were taught the max. fillet size (for example) is the thickness of the material - 1/16".
The effective throat is related to the radius of the flare. So you are looking at an effective throat of 5/16 * radius or 5/16 * 2*wallthickness or 5/16 * 2 * .125" = .078125. Just 5/64ths of an inch.
It's a little unclear to me in the AWS spec, but I think you need to fill that weld flush to develop this capacity.