Jeddah Kingdom Tower vs Burj Khalifa and Dubai Creek Harbor Tower. Tallest skyscrapers in the world – Dubai Video



published: 2019-04-16 14:00:01

A skyscraper is a continuously habitable high-rise building that has over 40 floors[1] and is taller than approximately 150 m (492 ft).[2] Historically, the term first referred to buildings with 10 to 20 floors in the 1880s. The definition shifted with advancing construction technology during the 20th century.[1] Skyscrapers may host commercial offices or residential space, or both. For buildings above a height of 300 m (984 ft), the term “supertall” can be used, while skyscrapers reaching beyond 600 m (1,969 ft) are classified as “megatall”.[3]

One common feature of skyscrapers is having a steel framework that supports curtain walls. 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. Some early skyscrapers have a steel frame that enables the construction of load-bearing walls taller than of those made of reinforced concrete.

Modern skyscrapers’ walls are not load-bearing, and most skyscrapers are characterized by large surface areas of windows made possible by steel frames and curtain walls. However, skyscrapers can have curtain walls that mimic conventional walls with a small surface area of windows. Modern skyscrapers often have a tubular structure, and are designed to act like a hollow cylinder to resist wind, seismic, and other lateral loads. To appear more slender, allow less wind exposure, and transmit more daylight to the ground, many skyscrapers have a design with setbacks, which are sometimes also structurally required.

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