0.2mm to 1.0mm. For steel structure roofs, the color galvanized steel plates used are Ts280GD (Tste28) or Ts350GD (Tste34) structural steel plates produced by Shanghai Baosteel, with actual thicknesses ranging from 0.2mm to 1.0mm. Steel structure roof has high strength and light weight. Compared with traditional reinforced concrete structures, steel structures have the characteristics of high strength and light weight.