DOUBLE CHANNEL TYPE; ASTM A1018/B633 STEEL MATERIAL; ZINC ELECTROPLATED FINISH; 18 INCH; 6-1/4 INCH; B22A CHANNEL USED ON; 1-5/8 INCH CHANNEL WIDTH; 7/32 INCH THICKNESS; HOT ROLLED PICKLED OILED PROCESS; 835 LB LOAD RATING; 3-1/4 INCH CHANNEL DEPTH