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= = =What= S ** kyscraper ** is a tall, continuously habitable [|building]. There is no official definition or height above which a building may clearly be classified as a skyscraper. Most cities define the term [|empirically] ; even a building of 80 meters (262 feet) may be considered a skyscraper if it protrudes above its built environment and changes the overall [|skyline] - //**  ﻿ wikipedia **//

The term "skyscraper" was first used during the 1880s, shortly after the first 10 to 20 story buildings were built in the United States. Combining several innovations: [| steel] structure, [|elevators], central heating, electrical plumbing pumps and the [|telephone], skyscrapers came to dominate American skylines at the turn of the century. The world's tallest building when it opened in 1913, architect Cass Gilbert's 793-foot Woolworth Building was considered a leading example of tall building design.
 * Woolworth Building - Skyscaper **
 * First Use of the Term Skyscraper **
 * //ABOUT//**

The second development took place in Chicago. In 1871, Chicago suffered a devastating fire. In the years that followed, however, instead of recovering slowly, the city experienced explosive growth, and it quickly began to strain against its natural boundaries. By the 1880s, the available land for new buildings in this area could not keep up with demand; the only alternative was to build up. But in order to achieve the desired height, construction techniques had to change. A new method of building was developed that used a grid of steel beams and columns that were strong enough to support any stresses or [|forces] a building might experience, including both the weight of the floor and the building contents, as well as the force of wind or even, in some areas, earthquakes. And with this new building method, the skyscraper was born and the race for the [|tallest building] began. **//Infoplease//**  **//http://www.venkywallpapers.com/wp-content/uploads/2010/11/Skyscrapers-1.jpg//** 

//** ﻿ **// = Who = Englishmen, [|Henry Bessemer] (1813-1898) invented first process for mass-producing steel inexpensively, essential to the development of skyscrapers. An American, William Kelly, had held a patent for "a system of air blowing the carbon out of pig iron" another method of steel production. Bankruptcy forced Kelly to sell his patent to Henry Bessemer, who had been working on a similar process for making steel. Bessemer patented "a decarbonization process, utilizing a blast of air" in 1855. Modern steel is made using technology based on Henry Bessemer's process. **//ABOUT//**

===Removing the Obstacles=== Two developments in the 19th century paved the way for a whole new type of building: the skyscraper. The first was the development of a safe [|elevator]. Primitive elevators of various designs had been used for centuries, and starting in the mid 19th century, steam-operated elevators were used to move materials in factories, mines, and warehouses. But these elevators were not considered safe for people; if the cable broke, they would plummet to the bottom of the elevator shaft. Then in 1853, an American inventor named Elisha Graves Otis developed a safety device that kept elevators from falling if a cable should break. This new development had an enormous impact on public confidence. And later in the century, the switch to an electric motor made the elevator a practical solution to the problem of getting up and down tall buildings. **//Infoplease//**

toc =Where= The term "skyscraper" was first used during the 1880s, shortly after the first 10 to 20 story buildings were built in the United States. **//ABOUT//**
 * First Use of the Term Skyscraper **

=When= The term was first applied to buildings in the late 19th century as a result of public amazement at the tall buildings being built in [|Chicago] and [|New York City] .[|[1]] The first skyscraper was for many years thought to be the [|Home Insurance Building] built in Chicago, Illinois in 1885. More recent arguments point to New York's seven floor [|Equitable Life Assurance Building] built in 1870 and it was arguably the first office building built using a kind of skeletal frame but it depends on what factors are chosen and even the scholars making the argument find it academic.[|[][|2][|]] //** wikipedia **//

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=4th date= 2004 [|Taipei 101], completed in Taiwan in 2004, which tops out at 1,670 feet and 101 stories **//Infoplease//**

=5th date= 2008 []
 * Burj Khalifa** ([|Arabic]: **برج خليفة**‎ "[|Khalifa] Tower"),[|[][|8][|]] known as **Burj Dubai** prior to its inauguration, is a [|skyscraper] in [|Dubai], [|United Arab Emirates], and the [|tallest man-made structure] ever built, at 828 m (2,717 ft).[|[][|8][|]] Construction began on 21 September 2004, with the exterior of the structure completed on 1 October 2009. The building officially opened on 4 January 2010,[|[][|1][|]][|[][|9][|]] and is part of the new 2 km2 (490-acre) flagship development called [|Downtown Dubai] at the 'First Interchange' along [|Sheikh Zayed Road], near Dubai's main business district. **Wikipedia**


 * Official website of the Burj []**

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=Pictures= http://andrewprokos.com/d/flatiron-building-broadway?g2_itemId=2883&g2_serialNumber=6
 * Flatiron Building - Skyscaper **

http://www.nyc-architecture.com/SCC/View_of_Woolworth_Building_fixed.jpg
 * Woolworth Building - Skyscaper **

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__ SkyScraper by Andy Birch __

The skyscraper is a high building. There is no official definition and this has even changed over time, but even a building of 80 meters may be considered a skyscraper.

The first skyscrapers were buildings that were 10 to 20 stories tall. They used a new technique invented by a man called William Kelly that produced stronger steel. It wasn't until the 1880s that the word skyscraper was even used.

According to many websites the first true skyscraper is considered to be the Woolworth building in New York designed by Cass Gilbert. The building was 793 feet high and opened in 1913.