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GB 50057-2010 第4.4.5条 Code for Design Protection of Structures Against Lightning

Down conductor电气工程

GB 50057-2010 第4.4.5条

| **** | **(For Class III lightning protection buildings) When round steel is used for down conductors, the diameter shall not be less than 8 mm; when flat steel is used, the cross-section shall not be less than 48 mm² and the thickness shall not be less than 4 mm.** |

Other clauses of this standard

GB 50057-2010 第1.0.1条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第1.0.2条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第1.0.3条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第1.0.4条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第1.0.5条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第1.0.6条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第第4.2.1条条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第第4.2.1条条Code for Design of Lightning Protection of Buildings
GB 50057-2010 第第5.2.1条条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第2.0.1条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第2.0.2条Code for Design Protection of Structures Against Lightning
GB 50057-2010 第2.0.3条Code for Design Protection of Structures Against Lightning

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