45 DEG KNEE TYPE; ASTM A1018/A653/B633 STEEL MATERIAL; ZINC ELECTROPLATED FINISH; 12 INCH; CHANNEL USED ON; 1-5/8 INCH CHANNEL WIDTH; 10-1/8 INCH CORNER TO BRACE LENGTH; 7/32 INCH THICKNESS; HOT ROLLED PICKLED OILED PROCESS; 1020 LB LOAD RATING