Lightning protection classification
1)? Category I: manufacturing and storing initiating explosive devices, etc. , caused by sparks, causing heavy losses and casualties; Buildings with explosion hazards in Zone 0 or Zone 20.
2)? The second category: national key cultural relics units; National buildings and large buildings; National super-Grade A and Grade A large gymnasiums; Dangerous buildings that manufacture and store explosives and their products are not easy to cause explosion or cause great damage and personal injury.
3)? Category III: Category III except the first and second categories.
Lightning protection building
1, equalizing ring
Equalizing ring is a horizontal lightning protection zone designed for high-rise buildings to prevent side lightning strikes. In architectural design, when the height exceeds the radius of the ball (30 meters for the first stage, 45 meters for the second stage and 60 meters for the third stage), a equalizing ring is set every 6 meters. In the design, the equalizing ring can be welded into a closed ring by using two main bars in the ring beam, and this closed ring must be connected with all down leads.
2. Lightning rod
The setting rules of lightning rods are generally: the highest point and protruding point, such as the corner of roof, cornice and flat roof.