When the Twin Towers collapsed on September 11‚ 2001‚ they made a sound heard around New York as a roar‚ or distant thunder. The South Tower was the first to go. Its upper floors tilted briefly before dropping‚ and driving the building straight down to the ground. Many people died‚ and many others were lucky enough to make it out alive. Twenty-nine minutes later the North Tower collapsed with much the same result as the first. The two symbols of America’s economy were gone‚ and not even the
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Tower Crane Introduction and function of Tower Crane Cranes are the commonly used in the construction industry and in the manufacturing of heavy equipments. Construction cranes are either fixed to the ground or mounted on a purpose-built vehicle. On the basis of their structure and functions cranes are divided into a tower or a derrick which is equipped with cables and pulleys that are used to lift or lower materials. Tower cranes are fixed to the ground‚ which helps to them to attain height
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Blaise Main Leaning Tower of Pisa Mrs. Carlson The Leaning Tower of Pisa is a freestanding bell tower located at the Cathedral Square in Pisa‚ Italy. It was built in three different stages over 177 year period. There has been controversy about the real identity of the architect for many years. Construction on the first floor began in August of 1173. Five years later‚ while building the third floor
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Petronas Towers‚ also known as Petronas Twin Towers‚ are twin buildings situated in Kuala Lumpur‚ Malaysia‚ on the site of city’s race track. Of the two building‚ the one named Tower 1 was built by Hazama Corporation‚ while the other‚ known as Tower 2‚ was constructed by Samsung Engineering & Construction. The construction work on Petronas Towers was completed in 1998 and they were opened in August 1999. At the time of their completion‚ the twin buildings were the tallest buildings in the world and
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serve as an inspiration to a person. One is the Leaning Tower of Pisa‚ famous for its inclination. It is also said to be the testing ground for Galileo’s experiments on gravity. The Tower of Pisa serves as the campanile or the freestanding bell tower of the Cathedral of the Italian city of Pisa. It is positioned behind the cathedral and is the third oldest structure in Pisa’s cathedral square after the Cathedral and the Baptistry. The tower is 183.27 ft from the low side and 186.02 ft from the
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Devil’s Tower Devils Tower National Monument‚ America’s first national monument is located in the Black Hills side of Crook County Wyoming and is home to the world famous rock formation that is raised high above the Ponderosa Pine Forest. The rock formation is a sacred part of the Native American tribes that live in the area. Native American tribes such as the Kiowa and Sioux speak of similar tales that surround the tower. Devils Tower can measure from its base more than four football fields tall
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THE EIFFEL TOWER The Eiffel Tower a symbol of Paris and France was built in1889. It is affectionately known as "Iron Lady". It rises 324 meters above the city. It was designed and built by an engineer Gustave Eiffel. It weighs in excess of 10000 tonnes and is made up of 18000 individual metal sections assembled using 2500000 rivets. The tower had three levels for the visitors to climb either by using stairs or elevator . It has nearly 300 steps from ground to the first level. The First and Second
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as a temporary exhibit‚ the Eiffel Tower was almost torn down in 1909. City officials opted to save it after recognizing its value as a radiotelegraph station. Several years later‚ during World War I‚ the Eiffel Tower intercepted enemy radio communications. It escaped destruction a second time during World War II. Over the years‚ the Eiffel Tower has been the site of numerous high-profile stunts‚ ceremonial events and even scientific experiments. The Eiffel Tower has also inspired more than 30 replicas
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There are many astonishing towers and buildings around the world‚ but the Petronas Twin Towers are unconventional. The Petronas Twin Towers are the world’s tallest buildings since 1996‚ featuring unique designs. The Petronas Twin Towers are located in the heart of Kuala Lumpur‚ the capital city of Malaysia. The Malaysian Government decided to built the Petronas Twin Towers in the late 1980’s‚ to represent Kuala Lumpur as a modern city with a respectable international standing. It took approximately
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Chapter 1 Introduction The notion of going green is not strictly a new technological concept‚ and any naturally occurring and theoretically inexhaustible energy such as wind‚ biomass‚ and solar‚ tidal‚ wave‚ hydroelectric power that is not derived from fossil or nuclear fuel is referred to as renewable energy. The relevance of these emerging fields became more pronounced when the need to produce clean‚ safe and efficient energy devices without trading off environmental friendliness arise. The current
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