At 828 metres (2,716.5ft), Burj Khalifa is 320 metres taller than Taipei 101, which at 508 metres (1,667 ft) had held the record for the world's tallest building measured to the architectural top since 2004, the year the project was announced.
Burj Khalifa achieved the distinction of being the world's tallest structure - surpassing the KVLY-TV mast (628.8 metres; 2,063 ft) in North Dakota, USA - 1,325 days after excavation work started in January 2004.
The tower also beats the 31-year-old record of CN Tower, which at 553.33 metres (1,815.5 ft) had been the world's tallest free-standing structure on land since 1976.
Burj Khalifa employs a record-breaking 330,000 cubic metres of concrete, 39,000 metric tonnes of steel rebar and 142,000 square metres of glass; and it took 22 million man hours to build.
Other world records for Burj Khalifa include the highest occupied floor in the world, at over 550 metres (1,800 ft); the highest outdoor observation deck in the world - At the Top on Level 124; and the tallest service elevator, which travels to a height of 504 metres (1,654 ft).
Mr. Mohamed Alabbar, Chairman, Emaar Properties, said that with the unveiling of the final height of Burj Khalifa, the world now had a new reference point for high-rise developments.
"Burj Khalifa is an example of collaboration on a global scale, and the tremendous positive energy that can be generated when people from all over the world come together to work towards a common goal. Thousands of professionals and skilled workers from around the world worked on this once-in-a-lifetime project."
"More than 60 of the world's leading consultants including South Korea's Samsung Corporation and New York-based Turner Construction International realised the design for Burj Khalifa of Chicago-based Skidmore, Owings and Merrill (SOM)," he said.
Burj Khalifa employed the latest advances in wind engineering, structural engineering, structural systems, construction materials and methods. All design considerations took into account the 12,000 people who will live and work in the tower. The handover to residents of the various components of Burj Khalifa will begin in February.
With a total built-up area of about 6 million sq ft, Burj Khalifa features nearly 2 million sq ft of residential space and over 300,000 sq ft of prime office space, in addition to the area occupied by the keenly awaited Armani Hotel Dubai and the Armani Residences. The tower also features modern lifestyle amenities including clubs, health and fitness facilities, gourmet restaurants and the 124th floor observation deck, 'At the Top.'
Burj Khalifa is the focal point of the 500-acre 'mega-project' by Emaar Properties, described as
the new heart of Dubai.
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