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So Why Build A Tower In The First Place During Torontos building boom in the early 70s a serious problem was developing People were experiencing poor quality television The pre-skyscraper transmission towers of Toronto stations were simply not high enough anymoreAs office buildings were reaching higher and higher the video reception and radio signaq got weaker and soon became alomst inpossible to recieve Signals from Toronto and from Buffalo New York were bouncing off the buildings As a result viewers often saw a weaker station superimposed over another So the were watching two shows at once It became clear that they needed a antenna that would not only be taller than any building in the city but one that would be taller than anything that would probably ever be built Today the microwave receivers which pull in distant signals are about 305 metres or 1000 feet up inside that white donut-like thing and the top of the transmission antenna is 55333 metres or 1815 feet 5 inches high thats the very topBecause of this we enjoy some of the clearest TV and radio reception in North America An extra little tidbit you may not have known It wasnt until late in the design process that the architects decided to turn the Tower into a Tourist Attraction These are the hard facts The CN Tower was built by the Canadian National Railway Opened to the public on June 26 1976 Official opening on October 1 1976 Original cost 63 million Adjusted cost 1997 dollars 250 million Total construction time 40 months Number of construction workers 1537 Total weight of the Tower 117910 metric tonnes 130000 tons Volume of concrete 405238 cubic metres 53000 cubic yards Reinforcing steel 4535 metric tonnes 5000 tons Structural steel 5442 metric tonnes 600 tons Number of elevators 6 including 2 which officially opened March 20 1997 Speed of
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