... span 4)long service life light steel structure house Products specification:1.Construction Area: 17000 M2 2 ... , stairs, welded steel parts, steel frame of cement buildings, chicken sheds, car exhibition halls , sunshades, prefabricated sheds, Appilications: ... storage, office, market shed, chicken shed, car exhibition hall,hangar, garage, stairs, prefab house, supermarket etc steel structure buildings. ...