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[Phenomenon] T-shaped joints, cross joints, corner joints and other butt or corner butt combined welds that require penetration, the size of the weld leg is not enough, or the design of the web and upper wing of a crane beam or similar components that requires fatigue checking If the size of the welding leg of the plate edge connection weld is not enough, the strength and rigidity of the welding will not meet the design requirements.
[Measures] T-shaped joints, cross joints, fillet joints and other butt joints that require penetration must have sufficient fillet requirements according to the design requirements. Generally, the size of the weld fillet should not be less than 0.25t (t is the joint thinner plate thickness). The welding leg size of the welds connecting the web and the upper flange of the crane girder or similar webs with fatigue checking requirements is 0.5t, and should not be greater than 10mm. The allowable deviation of welding size is 0-4 mm.