GB 50057-2010 第5.2.1条
| **** | **Air-termination material**: For air-termination rods (lightning rods) made of hot-dip galvanized round steel, the diameter shall not be less than **12mm**; for hot-dip galvanized steel pipe, the wall thickness shall not be less than **2.5mm**. For air-termination strips (lightning protection strips) made of hot-dip galvanized round steel, the diameter shall not be less than **8mm**; for flat steel, the cross-sectional area shall not be less than **48mm²** and the thickness shall not be less than **4mm**. |