projecting member 58 on another side 62 thereof the projecting member 58 preferably completely extends from the top edge 50 of the door jam member 18 to the bottom edge 54 of the door jamb member 18 the doorjamb member 18 further preferably includes a plurality of recesses 66 in side 48 which abuts a side support frame member 70 fig3 5 upon installation the recesses 66 can be of different shapes and sizes but the recesses preferably completely extend from the top edge 50 of the door jamb member 18 to the bottom edge 54 of the door jamb member 18 the recesses 66 add strength and rigidity to the doorjamb member 18 when the doorjamb member 18 is attached to the side frame member 70 the trim member 26 includes a groove 74 in one side 78 thereof the groove 74 preferably completely extends from the top edge 80 of the trim member 26 to the bottom edge 82 fig1 of the trim member 26 it is noted that the top edge 80 and the bottom edge 82 of the trim member 26 can be cut or mitered as may be needed see e g fig1 the trim member 26 also includes a slot 84 in side 78 the slot.