Tuesday, 28 February 2012

CN TOWER

CN TOWER

Location: CANADA
 
FACTS ABOUT
  CN TOWER
Height:
    Antenna spire 553.33 metres (1,815.4 feet).
    Roof 457.2 metres (1,500 feet).
    Top floor 446.5 metres (1,464.9 feet).
Floor count:
    147 (Equivalent).
    No: of elevators: 6
Architect:  John Andrews Architect
                     
WZMH Architects
 
  CN TOWER
Description:
 
    The CN Tower stands for Canadian National Tower which is a communication & observation tower located in Downtown Toronto, Ontario, Canada. This tower was made by the railway company. It is 553.33 metres (1,815.4 feet) completed in 1976. Alternatively, it is also called Canada’s National Tower. After the completion of its construction it became the world's tallest free-standing structure and world's tallest tower at the time but now its status of being tallest free standing structure in the world has been replaced by the construction of Burj  Khalifa and Canton Tower but it is still the tallest free standing structure in the western hemisphere. The idea of construction of this tower resulted as a desire of Canadian National Railway for the purpose of building a large TV and radio communication platform to serve the Toronto area and demonstrating the Canadian industry’s strength and CN particular as well. On Feb 6 1973, the construction of CN Tower was begun with massive excavations at the base of the tower for the foundation. During its construction, 61,729 short tons; 55,116 long tonsof dirt and shale were removed to a depth of 15 metres in the centre, and a base incorporating 7,000 cubic metres (9,156 cu yd) of concrete with 450 tonnes (496 short tons; 443 long tons) of rebar and 36 tonnes (40 short tons; 35 long tons) of steel cable had been built to a thickness of 6.7 metres (22.0 ft). The Canadian National Tower consists of several substructures having a main portion hollow complete hexagonal structure. This tower has got two visitor areas which are the main deck level which is formerly known as SkyPod which is located at 346 metres and the higher SkyPod  formerly known as “SpaceDesk” located at 446.5 metres. Its spectacular structure is making it as one of the wonders of the world.

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