Q: Which buildings are more vulnerable to lightning strikes?
A: The development of modern architecture is changing with each passing day. With the application of new building materials and the continuous emergence of high-rise buildings, people's awareness of building lightning protection is increasing, and various lightning protection technologies are also developing in diversified directions. From ancient times to the present, there have been countless lightning strike accidents in buildings in our country. It is very important to understand the patterns of lightning strikes. Only by mastering the rules can lightning protection design achieve good results. During thunderstorms, thunderstorms in the sky and objects on the ground have different charges. When electric charge accumulates to a certain extent, electric field distortion will occur and a lightning strike will occur. But if there isn't a strong enough upward director somewhere on the ground, lightning won't strike there.
In general, structures on lakes, ponds, and rivers are susceptible to lightning strikes. Tall, protruding buildings and buildings with metal roofs are also susceptible to lightning strikes. Public television antennas, flagpoles and tall old trees are also prone to disasters. These areas and buildings should be key mine protection areas.
Q: What are the lightning protection facilities for buildings?
Answer: The lightning protection facilities of buildings include three parts: high-voltage lightning arresters, direct lightning strikes and side lightning strikes. Direct lightning strikes are the part of the building where lightning strikes the sky; side lightning strikes refer to the parts of the building where lightning strikes below the sky and above the ground; direct lightning strike and side lightning protection facilities are mainly to protect the building itself from damage and reduce the impact on the internal space of the building when huge lightning current leaks into the earth;
If a building's lightning protection facilities lack any one of these three parts, it is called an inherent deficiency in the building's lightning protection capabilities, which will leave hidden dangers of lightning strikes and seriously threaten the safety of people's lives and property in the building (especially modern equipment using mo8 equipment, such as communications, computers, program-controlled telephones, televisions, audio, etc.).
The building lightning protection system consists of lightning rods, lightning protection nets (belts) or hybrid lightning arresters, down conductor devices composed of columns, beams, plate reinforcements or down conductors outside the main structure, and grounding devices composed of foundation natural grounding bodies (piles). foundation, ground beam, load-bearing platform or bottom plate reinforcement) or artificial grounding body. The entire building forms a Faraday cage, directing lightning currents into the earth.
Q: What should you pay attention to when designing and installing lightning protection devices?
Answer: Building lightning protection should have an overall concept. The so-called overall concept refers to the design and installation of lightning protection devices, and there must be an overall concept inside and outside the building. The interior and exterior of a building not only refer to internal lightning protection devices and external lightning protection devices.
The concept of building integrity refers to the unified consideration of internal and external high-voltage arresters and lightning protection devices during design and installation; the overall concept of building exterior refers to the lightning protection planning of a courtyard, a community and the surrounding environment. At the same time, the requirements of community planning cannot be violated. For example: whether the installed lightning rod tower affects the beauty of the community, whether the lightning rod, lightning rod or lightning protection net used matches the facade of the building, whether low buildings can be protected by high lightning protection devices. Buildings or tall chimneys, etc. Grounding devices should also be comprehensively considered, for example, whether buildings close to each other can share grounding bodies, whether underground pipe networks can use part of the grounding body, and whether equipotentiality can create connection conditions for comprehensive universal grounding devices in residential areas or communities in the future.
