This assembly consists of a double metal stud jamb supporting a header composed of two continuous four-inch metal studs turned on edge and nested into a bottom runner track. The runner track flanges are extended one and five-eighths inches beyond the face of the jamb on each side and secured with three-quarter-inch low-profile number ten pan head sheet metal screws. The runner track web is cut at the flanges and bent up against the face of the stud, fastened with two three-quarter-inch number ten pan head sheet metal screws located one-half inch up from the web and three-quarters of an inch in from each end of the bent web.
C JAMB AT TYPE 3 HEAD - OPENINGS 8'-0" TO 12'-0" WIDE DOUBLE METAL STUD JAMB CONTINUOUS RUNNER TRACK ATTACHED TO DOUBLE STUD EXTEND RUNNER TRACK FLANGES 1 5/8" MIN EACH SIDE BEYOND FACE OF JAMB. PROVIDE 3/4" LOW PROFILE #10 PAN HEAD SHEET METAL SCREWS EACH SIDE CUT FLANGES FROM WEB AND BEND WEB UP FACE OF STUD. PROVIDE TWO 3/4" #10 PAN HEAD SHEET METAL SCREWS. LOCATE SCREWS 1/2" UP FROM WEB AND 3/4" IN FROM EACH END OF BENT WEB TWO CONTINUOUS 4" METAL STUDS TURNED ON EDGE AND NESTED INTO BOTTOM RUNNER TRACK
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