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What is the safety factor of the portal tower?
2.5。 The safety factor of portal towers is 2.5, and that of most typical towers of transmission lines is 2.5. The iron tower is the most commonly used support on high voltage transmission lines. At home and abroad, hot-rolled equal-limb angle steel and bolted grid structures are mostly used, and a few countries use cold-formed steel, steel pipe or concrete-filled steel pipe, and the steel is hot-dipped galvanized for corrosion protection.
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