Is it true that overhead lighting grid is the same as that on building roof?
Structure design of lightning protection belt and lightning arresterGenerally speaking, lightning rods and lightning arresters shall be made of round steel or flat steel whose size shall not be smaller than the following values:Round steel diameter is 8mm, flat steel sectional area is 48mm2, flat steel thickness is 4mm.The lightning conductor is usually made of galvanized steel wire with a sectional area of not less than 35mm2.
There are many buildings on the top of the protrusion, such as metal flagpole, ventilation tube, steel ladder, metal chimney, wind window, metal gutters, and the lightning protection network must be welded together as lightning device. In the building of non concrete structure, the lightning arrester can be used. It is the first prominent edge part of the roof installed in the roof, when lightning with a main roof, plus a network assisted in the main line
The dark charging network is the top roof as a lightning receiving device. According to the general structure of the building, the rebar spacing surface is only 6-7cm, and the thinner the surface, the smaller the point of the lightning point. But some building waterproof layer and the insulating layer is thicker, the entrance from the steel surface layer thickness is greater than 20cm, the best the other auxiliary lightning protection network. Auxiliary lightning protection network can be used for galvanized steel rounds with diameters of 6mm or more. The grid size can be made by 5m '5m or 10m' 10m rounds according to the importance of the building. Lightning protection network, clear network and dark network, the more dense the grid, the better the reliability.
Lightning protection network refers to the use of reinforced concrete structure in the reinforcement of the network as a lightning protection method (if necessary, but also auxiliary lightning protection network), also known as dark installed lightning protection network. It is a metal conductor network based on the principle of the Faraday cage in classical electricity.
