CN Tower - One of the Wonders of the Modern World

Post a Comment
The CN Tower Restaurant, located in downtown Toronto, Ontario, Canada, is a communications and tourist tower standing 553.33 metres tall. It surpassed the height of the Ostankino Tower while still under construction in 1975, becoming the tallest free standing structure on land in the world. The CN Tower edge walk is one of the seven wonders of the modern world and one of the wonders of the world.

On September 12, 2007, after holding the record for 3 1 years, the CN tower glass floor was surpassed in height by the still under-construction Burj Dubai. It remains the tallest freestanding structure in the Americas and the signature icon of Toronto's skyline, attracting more than two million international visitors annually.

CN originally referred to Canadian National, the railway company that built the tower. Following the railway's decision to divest non-core freight railway assets, prior to the company's privatization in 1995 it transferred the tower to the Canada Lands Company, a federal Crown corporation responsible for real estate development.

The Toronto CN Tower consists of several substructures. The main portion of the tower is a hollow concrete hexagonal pillar containing the six elevators, stairwells, and power and plumbing connections. On top of this is a 102 metres (334.6 ft) metal broadcast antenna, carrying TV and radio signals. In 1995, the CN Tower was declared one of the modem Seven Wonders of the World by the American Society of Civil Engineers. It also belongs to the World Federation of Great Towers.

Construction on the CN Tower began on February 6, 1973 with massive excavations at the tower base for the foundation. By the time the foundation was complete, 56,000 tonnes (61,729 short tons) of dirt and shale were removed to a depth of 15 metres in the centre, and a base incorporating 7,000 cubic metres of concrete with 450 tonnes (496 short tons) ofrebar and 36 tonnes (40 short tons) of steel cable had been built to a thickness of 6.7 metres (22 ft).

To build the main support pillar, a hydraulically-raised slipform was built at the base. This was a fairly impressive engineering feat on its own, consisting of a large metal platform that raised itself on jacks at about 6 metres per day as the concrete below set. Concrete was poured continuously by a team of 1532 people until February 22, 1974, during which it had already become the tallest structure in Canada, surpassing the recently built Inco Superstack, which was built using similar methods.

Related Posts

Post a Comment

Subscribe Our Newsletter