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info from:http://en.wikipedia.org/wiki/Burj_Khalifa here you can see how this amazing building was build year by year. all records of building Records Tallest existing structure: 829.8 m (2,722 ft) (previously KVLY-TV mast – 628.8 m or 2,063 ft) Tallest structure ever built: 829.8 m (2,722 ft) (previously Warsaw radio mast – 646.38 m or 2,121 ft) Tallest freestanding structure: 829.8 m (2,722 ft) (previously CN Tower – 553.3 m or 1,815 ft) Tallest freestanding structure to have the most floors: 163 (previously CN Tower - 147) Tallest skyscraper (to top of spire): 829.8 m (2,722 ft) (previously Taipei 101 – 509.2 m or 1,671 ft) Tallest skyscraper to top of antenna: 829.8 m (2,722 ft) (previously the Willis (formerly Sears) Tower – 527 m or 1,729 ft) Building with most floors: 163 (previously World Trade Center – 110)[16] Building with world's highest occupied floor: 584.5 m (1,918 ft)[17][18] World's highest elevator installation (situated inside a rod at the very top of the building)[19] World's longest travel distance elevators: 504m (1,654 ft)[19][20] Highest vertical concrete pumping (for a building): 606 m (1,988 ft)[21] World's tallest structure that includes residential space[22] World's highest observation deck: 148th floor at 555 m (1,821 ft)[23][24] World's highest installation of an aluminium and glass façade: 512 m (1,680 ft)[25] World's highest nightclub: 144th floor[26] World's highest restaurant (At.mosphere): 122nd floor at 442 m (1,450 ft) (previously 360, at a height of 350 m (1,148 ft) in CN Tower)[27][28] World's highest New Year display of fireworks.[29] World's second highest swimming pool: 76th floor[30] (world's highest swimming pool is located on 118th floor of Ritz-Carlton Hotel at International Commerce Centre, Hong Kong).