What is reason for fully welding frame vs face welding

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Von Duprin doesn't offer any electric strike to fit into 1 1/2" aluminum/metal faced frame.  Minimum requirement to install 6211/6211AL is 1 15/32" mortise depth.
Elevation frames are available in: F-Series (F16 or F14) FN-Series (FN16 or FN14) MU-Series (MU16, MU14) Additional parameters of the frame components: Perimeter (Head and Jambs) Frame: ...
Both the DW and K-Series frames are identical with the exception of the base anchoring. Both the DW and K-series frames are supplied with a field adjustable compression anchor in each jamb located ...
Optional closer reinforcements are located at 3" from hinge jamb to the beginning of the reinforcement plate. This applies to Regular Arm, Parallel Arm, Top Jamb. Regular Arm (RA) closer reinfor...
If the door hits the frame (or rubs on the rabbet of the head or jamb) the frame is out of square and improperly installed. Door edge rubbing on the rabbet - shimming the hinges may resolve the...
Welded (SUA) frames: Welded frames are designed, manufactured and supplied with either square cut/notched corners or with (saw or die) miters and may or may not have connection tabs and slots. Thes...