METAL FRAMING, BACK TO BACK COMBINATION TYPE; ASTM A1011/A653 LOW CARBON STEEL MATERIAL; PRE-GALVANIZED FINISH; 240 INCH; 1-5/8 INCH; 3-1/4 INCH; SOLID CONFIGURATION; 12 GAUGE THICKNESS; COLD FORMED PROCESS; 2 CHANNEL(S); 1.124 SQ INCH CROSS SECTION AREA