Your choice of welded vs cut and notched vs. knocked-down drywall options.
Also called full or fully welded and/or full profile weld. Machine mitered continuous weld
Face welded frames are welded only on the both faces of the frame
Elevations cut and notched, then shipped knocked-down (KD) for assembly and welding in your shop.
Knocked-down (KD) drywall frames allow for easy shipping and convenient assembly in the field.