Steel Structure, Metal Building Materials, Welding Wires manufacturer / supplier in China, offering Heavy-Duty Steel Purlins for Roof & Wall Framing - Corrosion-Resistant Galvanized Coating - Easy Installation, Affordable U Type Purlins for Efficient Building Applications Building or Plant, Galvanized Steel C-Purlins: Corrosion-Resistant Quality at Affordable Prices and so on.