These curtain walls either bear on the framework below or are suspended from the framework above, rather than resting on load-bearing walls of conventional construction. One common feature of skyscrapers is having a steel framework that supports curtain walls. Skyscrapers may host offices, hotels, residential spaces, and retail spaces. Historically, the term first referred to buildings with between 10 and 20 stories when these types of buildings began to be constructed in the 1880s. Skyscrapers are very tall high-rise buildings. Modern sources currently define skyscrapers as being at least 100 metres or 150 metres in height, though there is no universally accepted definition. The setbacks at various heights are a typical skyscraper feature.Ī skyscraper is a tall continuously habitable building having multiple floors. Completed in 2009, the Burj Khalifa, in Dubai, United Arab Emirates, is currently the tallest building in the world, with a height of 829.8 metres (2,722 ft).
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