All metal parts must be galvanized; be cautious to protect the galvanized layer during operation.
The needle tips are made from galvanized steel pipes, with a wall thickness of not less than 3mm. The length of the tinned needle tip should be no less than 70mm. Lightning rods should be installed vertically and securely. The allowable deviation in verticality is 3/1000.
Welding requirements: The welding should be done using lap welding, with the lap length complying with the following specifications: for flat steel, it should be 1/3 of its width (and at least three edges should be welded).
The round steel is six times its diameter.
