... purlin, window, sandwich panel 4 ISO9001 1500sqm Double Sloped Galvanized Color Coated Steel Shed I IntroductionCompared with the traditional concrete structure ... can supply all kinds of steel structures, steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage ... house, prefabricated home, exhibition hall, etc. 1500sqm Double Sloped Galvanized Color Coated Steel Shed