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If the thickness of the top plate wall is 4 mm or more, why is it not necessary to install a lightning rod?

2020-04-10View Original

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In Article 9.2.2 of the \"Code for Fire Protection Design of Petrochemical Enterprises (2018 Edition)\\" (GB 50160-2008), why is it not necessary to install lightning rods when the thickness of the roof wall is 4 mm or more?
Reply #22020-05-03
Because at this thickness, lightning cannot penetrate the roof

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