Main Beam, Main Beam, Length 144 in, Color White, Load Carrying (Lbs. per Linear Ft.) 16.5 lb, Ceiling Tile Suspension System, Width 15/16 in, Height 1 11/16 in, Material Hot Dipped Galvanized Steel, Load Carry Rating Heavy Duty, Resists Inhibits Red Rusting, Standards ASTM C635, For Use With Ceiling Tiles