... purlin; sandwich panel; corrugated steel sheet6, long life span7, Environmental protection .The components of the house can be reusable. so ... extra.Zhejiang Dacheng Steel Structure Co., Ltd. Busisiness scope: Steel structure, Prefabricated house, Color Coated Steel Coil / Roll, Galvanized Steel CoilIf you are ... about our products ,pls contact us. Prefabricated Steel Frame Steel Structure Workshop