•   The dimensions called out in the joint design determine the behavior and performance of the joint design. The dimensions on a tongue and groove joint design typically have a tolerance of 0.005”, but the overall dimensions of the part are just as important in determining how the joint engages pre-weld.

•   If the dimensions of the joint are not executed properly, the joint will not perform as designed. However, a part with a properly executed joint design may not perform as designed due to a poor fit of the mating parts.

•   Ultimately, the performance of the welded part will be determined by the joint design and the fit of the mating halves of the part.