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How to set the lightning protection of steel scaffolding

Here I will introduce how to set the lightning protection of steel scaffolding:

First, air terminals or lightning rods, available from 25 to 32 mm in diameter, wall thickness of not less than 3 mm diameter galvanized pipe or not less than 12 mm galvanized steel produced in house on the corner of the scaffolding pole stand, a high degree of not less than 1 meter, and should top all of the horizontal pole connected to form a lightning network. Rack installed in the vertical transport in the middle of a lightning rod should be set to the side of the pole above the top of the access not less than 2 meters, the lower end of the stand pole ground wire, and hoist chassis ground.

Second, the grounding wire should maximize the use of steel. Vertical grounding can be 1.5 to 2 meters long, 25 to 30 mm in diameter, wall thickness of not less than 2.5 mm steel pipe with a diameter not less than 20 mm angle steel bar or 50 * 5. Grounding can choose the length of the level of not less than 3 meters in diameter from 8 to 14 mm round or thickness of not less than 4 mm wide and 25 to 40 mm flat steel. Also buried in the ground can also be used metal pipes, metal post, drill pipe, water pipe and into a reliable connection with the earth as a grounding metal structure. Grounding the highest point buried in the ground and under the ground is not light at 50 cm, when laying the new compacted fill. Steam pipe or chimney often heated air duct near the soil layer, located above the groundwater level of the masonry cinder or sand, the dry soil and in particular shall not be buried ground wire.

Third, the ground wire that is deflectors, can be not less than 16 mm cross-section of aluminum wire or a section of not less than 12 square millimeters of copper wire. To save Yousejinzhu Ke reliable connection under the premise of the diameter of not less than 8 mm round or thickness of not less than 4 mm flat steel. Ground wire and the grounding connection is best to use solder, solder ground wire length should be more than 6 times the diameter or more than 2 times the width of flat steel. If bolted, ground contact surface not less than 4 times the cross-sectional area, splicing bolts of not less than 9 mm in diameter.

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