A transmission tower (colloquially termed an electricity pylon in the United Kingdom and parts of Europe, an ironman in Australia, and a hydro tower in English Canada) is a tall structure, usually a steel lattice tower, used to support an overhead power line. They are used in high-voltage AC and DC systems, and come in a wide variety of shapes and sizes. Typical height ranges from 15 to 55 metres (49 to 180 ft), though the tallest are the 370 m (1,214 ft) towers of a 2700 metres long span of Zhoushan Island Overhead Powerline Tie. In addition to steel, other materials may be used, including concrete and wood. The products are covered by Well-designed and fabricated structures for state electricity boards for the purposes of electricity supply (i,e) a) power transmission Towers, TV and Radio Towers, Telecommunication Towers, b) Railway and Highway bridges etc. c. Industrial structures etc. Transmission towers constitute a major component of infrastructure for the power sector. These carry the load of power conductors. With the expansion of power generation, the length of transmission and distribution lines has also gone up. Any entrepreneur venture into this field will be successful. Few Indian Major Players are as under • Associated Transrail Structures Ltd. • Baroda Power Transmission Ltd. • Diamond Power Infrastructure Ltd. • Gammon India Ltd. • Hirakud Industrial Works Ltd. • Jyoti Structures Ltd. • K E C International Ltd. • Kalpataru Power Transmission Ltd. • Larsen & Toubro Ltd. • R P G Transmission Ltd. • Shrijee Heavy Projects Works Ltd. • Suzlon Towers & Structures Ltd. • Tata Projects Ltd. • Transpower Engineering Ltd. • Transrail Lighting Ltd. • Unitech Power Transmission Ltd.
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