... purlin, window, sandwich panel 4 ISO9001 1500sqm Double Sloped Galvanized Color Coated Steel Shed I IntroductionCompared with the traditional concrete structure building system ... . ApplicationIndustrial steel structure warehouse, workshop, hangar, garage, chicken shed, container house, prefabricated home, exhibition hall, etc. 1500sqm Double Sloped Galvanized Color Coated Steel Shed