High Quality steel c purlin 1.Light but firm 2.Corrosion resisting 3.Galvanized ... , 2.0, 2.5 and 3.0 mm.5) Section: C & Z section, from 100 mm to 350 mm height.6 ... )Finish: Hot dip Galvanized, High grade ASTMA 653 Gr50 B, AZ 275 g/m2. Equivalent ... houses, ceiling board, roof structure applied in building engineering, etc. High Quality steel c purlin