... C purlin, window, sandwich panel 4 ISO9001 1500sqm Double Sloped Galvanized Color Coated Steel Shed I IntroductionCompared with the traditional ... and more popular with the customers. It is mainly used for large-span structures, workshops, warehouses, office buildings, large ... , steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other riveting and ...