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发表于 2013-12-10 21:13:26
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IEC 62305-3-2010:E.5.2.4.2.4 Protection of flush-mounted or protruding roof fixtures
Metal roof fixtures, not protected by air-termination rods, do not require additional protection if
their dimensions do not exceed all of the following values:
– height above the roof level 0,3 m;
– the total area of the fixture 1,0 m2;
– the length of the fixture 2,0 m. |
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