Lightning usually adopts the round steel or steel pipe is made, its diameter should not less than the following values:

1, independent lightning rod with a diameter of 19 mm galvanized round steel.

2, the lightning rod on the roof with diameter of 25 mm galvanized steel pipe.

3, water tower at the top of the lightning rod with diameter of 25 mm or 40 mm galvanized steel pipe

4, the lightning rod on the top of the chimney is 25 mm diameter galvanized round steel or galvanized steel pipe diameter of 40 mm e lightning protection rings with a diameter of 12 mm galvanized round steel or section of 100 was galvanized flat steel, its thickness should be 4 mm.