Patent ID: 7971400

Claim:
A door jamb, adapted to be coupled to second and third door jambs to make a door frame assembly, said door jamb having a front, a rear, a door-facing side and an opposing building-facing side, a length, and a depth between the front and the rear, said door jamb comprising: (a) an elongate jamb block ( 229 ) extending along the length of said door jamb and comprising a front wall ( 240 ), a rear wall ( 242 ), a first side wall ( 224 ) on the door-facing side of said jamb, and a second side wall ( 226 ) on the building-facing side of said jamb, said jamb block further comprising first and second mounting structures, spaced from each other, in the vicinity of said rear wall; and (b) an elongate depth extender extending along the length of said door jamb, said depth extender comprising a finger strip locked in said first mounting structure and a locking stud strip locked in said second mounting structure.