Rethinking Skyscrapers
摩天大楼的警示
Most of the world’s tall buildings, called skyscrapers, are in the United States.
However, the terrorist attacks have caud come Americans to worry about the safety of the extremely tall buildings.
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jabberFor almost 30 years, the World Trade Center stood more than 410 meters above New York City’s financial center. The two towers of the Center were the tallest buildings in the city. They had more than 100 levels. Then on the morning of September Eleventh last year, two hijacked (劫持合同管理工作总结)almost human airplanes struck the buildings.mead
About 50 thousand people worked in the World Trade Center.
Some estimates say many 90 thousand people pasd through it on some days. The towers reprented business and trade in the biggest city in America. Many people through
out the world recognized pictures of the World Trade Center against the skies of New York.make it up
After the collap of the twin towers, some city planners believe such extremely tall structures should not be replaced. Some members believe skyscrapers waste space The experts say some buildings u their lower levels mainly to get people to the upper levels.
Some experts also believe the office needs of business are changing. Most large companies now have their headquarters in skyscrapers. This permits their employees to work together in one place. However, employees today can communicate easily though electronic mail and other technology. So some planners believe there will be less need for skyscrapers in the future. The Empire State building is now the tallest building in New York City. It was built in 1931. It was the tallest building in the world for more than 40 years. It still is one of the most popular. Thousands of millions of visitors have en New York from obrvation areas in this building.
纳达尔世界第一
Skyscrapers were invented in the United States. As early as the 1880, two new technical developments made the taller buildings possible. One development was the mechanical steps to reach the upper floors of tall buildings. The development of steel also helped make taller buildings possible.
eitherorChicago became home to the world’s tallest building in 1973 when the Sears Tower was built. It is 442 meters tall. The Sears Tower was the tallest building in the world for 23 years. Then, in 1996, two taller buildings were completed. They are the Petronas Towers in Kuala Lumpur Malaysia. They are about 452 meters tall.
Experts say there is almost no engineering limit to the height a skyscraper can be still people’s feelings may limit the size of skyscrapers in the future.
For example, a New York City stock trader works in an office high in a skyscraper. He says he once liked to look out his office window and e the other tall buildings of the city. But his feelings have changed since the terrorist attacks. Now he says he would, he would like to work much clor to the ground.
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