EVWELDER:
AWS D1.2:2003, Figure 3.29 denotes maximum root opening and root face dimensions. I would like to know where the additional 1/16" comes from. If he/she is applying the as fit-up tolerances from the recommended joint details, that is incorrect. All the V grooves in Figures B1 require backgouging. I know your not backgouging your 6G.
Max is max, is max, is max.