Sketches (r) & (s) and related material formerly occupied Mandatory Appendix 28 specfic to box headers, and provided alternate weld details to UW-13.2. Apparently now can be applied to other constructions.
It appears that Fig. UG-34 was not updated accordingly. I don't see why Fig UG-34 sketch (h) could not be applied.
Please keep us posted on your interpretation.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand