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Torre Mayor
The Torre Mayor (literally "Major Tower") is a skyscraper in Mexico City, Mexico. With a height of 225 metres (738 feet) to the top floor and 55 stories, it is the third tallest building in Mexico City. It was surpassed in height by Torre BBVA Bancomer, which in turn was surpassed by Torre Reforma. From its completion in 2003 until 2010 (when it was surpassed by the 236 meter (774 ft) high Ocean Two in Panama City.〔http://www.emporis.com/building/ocean-two-panama-city-panama〕 ) it was also the tallest building in Latin America. The Torre Mayor was developed by Canadian businessman Paul Reichmann, who also maintains part ownership. It is also part-owned by a group of institutional investors. The building was designed by the architectural firms of Zeidler Partnership Architects and Executive Architects Adamson Associates Architects, both of Toronto.
Located at Paseo de la Reforma, it was built by Canadian-owned Reichmann International on the former location of the Cine Chapultepec.〔http://cinematreasures.org/theaters/2353〕 Construction work began in 1999 and was finished in late 2003. Due to Mexico City's high propensity to earthquakes, the tower incorporates several anti-earthquake measures. Torre Mayor is one of the strongest buildings on Earth in terms of earthquake resistance, being designed to withstand earthquakes measuring 8.5 on the Richter Scale. The U.S. Bank Tower in earthquake prone Los Angeles, California by comparison, is designed to withstand an 8.3 intensity earthquake.〔http://armstrongpumps.com/Torre_Mayor_Mexico_City_Mexico_en.asp〕
==Earthquake resistance==
The Torre Mayor stands in the lakebed area where most of the 1985 earthquake damage occurred, It was built with 96 dampers, which work like car shock absorbers to block the resonating effect of the lakebed and its own height. These diamond-shaped dampers are seen architecturally on its perimeter. With this extra bracing, this tower can withstand earthquake forces nearly four times as efficiently as a conventionally damped building. The dampening system proved its worth in January 2003, as a 7.6 earthquake shook the city. Not only did the building survive undamaged, occupants inside at the time did not know a tremor had occurred.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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