CHANNEL TYPE; ASTM A1018/B633 STEEL MATERIAL; ZINC ELECTROPLATED FINISH; 18 INCH; 3-1/2 INCH; B22 CHANNEL USED ON; 1-5/8 INCH CHANNEL WIDTH; 7/32 INCH THICKNESS; HOT ROLLED PICKLED OILED PROCESS; 400 LB LOAD RATING; 1-5/8 INCH CHANNEL DEPTH