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The lightning protection for civil construction projects is divided into three levels

28-02-2019

The lightning protection for civil construction projects is divided into three levels. The roof is generally laid with 25×4 hot-dip galvanized flat steel as a lightning protection belt along the parapet wall. The 25×4 hot-dip galvanized flat steel lightning protection belt supports the spacing of the clamps to about 1 meter, but it must be Consistently, the hanging section at the corner is no more than 1 meter, the lightning protection belt is 0.15 meters above the roof decoration or the parapet wall, and the roof is made of 25×4 hot-dip galvanized flat steel. The lightning protection grid is laid along the roof, and all metal components above the roof are welded to the lightning protection belt.

· At present, the general civil building uses the main steel bar in the structural column or the shear wall as the down conductor. The steel bars are welded up and down, and the diameter is larger than 16 mm. The upper part of the column is pre-embedded with 100×100×8 steel plates for The conversion of the main reinforcement in the column to the lightning protection belt.

· The form of the engineering grounding body mainly consists of an artificial grounding body and the use of the foundation as a grounding body. The equipotential grounding network is constructed by using the steel mesh of the cap and the steel bar of the pile foundation, and the grounding resistance is not more than 1 ohm.

·The steel bars in the continuous beam of each layer of the outer wall of the building are welded together with the floor steel to form a pressure equalizing ring, which is reliably connected with the down conductor. The metal doors and windows, metal structures and outer wall railings on the outer wall are connected with the pressure equalizing ring. Anti-side lightning.

· In recent years, equipotential bonding requirements have become increasingly stringent, mainly including total equipotential bonding, auxiliary equipotential bonding, and local equipotential bonding. Machine room, bathroom equipment, metal pipelines, etc. are generally to be equipotential grounded.