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Spinnaker Tower By Vlad Kadaiev Form 22 School 22 Spinnaker Tower Structure The tower, at a height of 170 m above sea level, is 2 1⁄2 times as high as Nelson's Column, making it one of the tallest accessible structures in the United Kingdom outside London. The tower is visible for miles around Portsmouth, changing the horizon of the area. It can be seen from the Isle of Wight, the Manhood Peninsula and even Highdown Gardens in Worthing.The tower represents sails billowing in the wind, a design accomplished using two large, white, sweeping metal arcs, which give the tower its spinnaker sail design. The steelwork was fabricated by Butterley Engineering. At the top is a triple observation deck, providing a 360° view of the city of Portsmouth, the Langstone and Portsmouth harbours, and a viewing distance of 37 kilometres (23 mi). The highest of the three observation platforms, the crow's nest, has only a wire mesh roof, so visitors are open to the elements. The windows extend above head height, so it is not possible to get a view unobstructed by glass. The glass floor is the largest in Europe. The tower has a design lifetime of 80 years.The design is similar to the Burj Al Arab in Dubai, whose structure is a little less than twice as tall at 323 metres (1,060 ft). History The END