... with bolts 3)large span 4)long service life price for structural steel fabricationProducts specification:1.Construction Area: 17000 ... LTD. produce light and heavy steel structure buildings for 13 years in Qingdao of China.With floor space ... sunshades, prefabricated sheds, Appilications: warehouse, workshop, storage, office, market shed, chicken shed, car exhibition hall,hangar, garage, stairs, prefab ...