I completed a calculation package a few weeks ago regarding the modification of some lifting lugs welded to a rigid frame. The weld strength calculated from the ultimate strength of the weld metal (70 ksi min.) is adequate for the load with a >5 FOS, but one of the comments I got back was "what is the weld's FOS on yielding?" The yielding of the joined materials has already been addressed elsewhere in the calcs, so my question is: do welds even yield? and if they do, how do I calculate that condition? I have yet to see it addressed in AISC or ASME BTH. Thanks in advance for your help.
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