L68B2 Mast Section Lightning protection of tower crane
In Thunderstorm prone areas, tower crane lightning protection measures can not be ignored. Linqing tower crane construction machinery factory explains how to correctly handle tower crane lightning protection devices.
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
Lightning protection grounding and protection zero connection of tower crane
1. The lightning protection grounding body adopts 4 * 40MM galvanized flat iron to weld with the main reinforcement of the pile, and the grounding resistance shall not be greater than 1 ohm;
2. The lightning down lead adopts 35mm2 copper core wire, one end is anchored to the galvanized flat iron with M10 bolts, the upper end is anchored to the lightning rod of the tower cap, the lightning rod adopts 20 diameter galvanized steel pipe, the lower welding is 70 * 70 * 5 galvanized angle steel, the needle tip adopts 16 diameter galvanized round steel grinding point, and the installation length is 1m higher than the tower cap..
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
3. Connection of protective grounding and tower crane: weld an M12 bolt on the tower base, fix one end of the protective grounding wire on the bolt and one end on the protective grounding terminal board in the switch box. The diameter of the line is the same as that of the tower crane incoming line.
L68B2 Mast Section：
http://www.towercranesupply.com/product/l68b2-mast-section-for-tower-crane-masts
