![]() ![]() The seminar offers to consider the prospects of protection of high-rise buildings from direct lightning strikes, and special attention will be paid to the equipment installed on the roof. Upstream lightnings usually start from the highest component of the structure, especially if its top is of a small radius. Any high-altitude lightning rods are ineffective for protection against downstream lightnings. The trajectory of the first ones is poorly predictable, they can hit the side surface of a high-rise building far below its top. The behavior of the downstream and upstream lightnings is fundamentally different. Only the number of reverse lightning grows (from the building to the cloud - upstream). If the building is higher than 200 m, it gets hit by downstream lightning 2 - 3 per year and if the building is higher, the number of strikes doesn't increase. Correct to say - to the increase of frequency of being struck by lightning, because lightning strikes not only hit high-rise buildings, they are also initiated on their tops, moving toward the charged cell of a thundercloud. Height of the object leads to the increase of the number of lightning strikes into it. ![]() However, high-rise buildings have become a reality, almost daily routine. High-rise construction has become fashionable in our country, perhaps unjustifiably fashionable with our poorly covered territories. We recommend streaming of "720p" quality in a full-screen mode. ![]()
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