Outside the Burj Khalifa, WET Enterprises designed a fountain system at a cost of Dh 800 million (US$217 million). On 26 October 2008, Emaar announced that based on results of a naming contest the fountain would be called the Dubai Fountain. The spire of Burj Khalifa is composed of more than 4,000 tonnes (4,400 short tons; 3,900 long tons) of structural steel. The central pinnacle pipe weighs 350 tonnes (390 short tons; 340 long tons) and has a height of 200 m (660 ft).

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• The tower was known as Burj Dubai (“Dubai Tower”) until its official opening in January 2010.

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• The foundation was designed to support the total building weight of approximately 450,000 tonnes (500,000 short tons; 440,000 long tons).
• On 26 October 2008, Emaar announced that based on results of a naming contest the fountain would be called the Dubai Fountain.

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• The top of the building is cleaned by a crew that uses ropes to descend from the top to gain access.

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• Putzmeister created a new, super high-pressure trailer concrete pump, the BSA SHP-D, for this project.

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• This 244-metre (801 ft) spire is widely considered vanity height, since very little of its space is usable.

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Burj Khalifa

The hotel was supposed to Lucky Mister open on 18 March 2010, but after several delays, it finally opened to the public on 27 April 2010. At the top, the central core emerges and is sculpted to form a finishing spire. The building was opened in 2010 as part of a new development called Downtown Dubai. The steel was shipped to Dubai after the Palace’s demolition was completed in 2008. Engineers initially considered installing the world’s first triple-deck elevators. The double-deckers are equipped with LCD displays to amuse visitors during their travel to the observation deck.

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• Khan’s contributions to the design of tall buildings have had a profound impact on architecture and engineering.

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• On the higher floors, the sun is seen for several minutes after it has set at ground level.

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• Such a skyscraper, if located in Europe, would be the 11th tallest building on that continent.

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• Engineers initially considered installing the world’s first triple-deck elevators.

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• An outdoor zero-entry swimming pool is located on the 76th floor of the tower.
• Most of the workers involved in the riot returned the following day but refused to work.

Construction

The foundation was designed to support the total building weight of approximately 450,000 tonnes (500,000 short tons; 440,000 long tons). This weight was then divided by the compressive strength of concrete which is 30 MPa which yielded 450 sq. A cathodic protection system is under the concrete to neutralise the sulphate and chloride-rich groundwater and prevent corrosion.
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• Due to its tubular system, proportionally only half the amount of steel was used in the construction, compared to the Empire State Building.

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• The hotel was supposed to open on 18 March 2010, but after several delays, it finally opened to the public on 27 April 2010.
• Cooler concrete cures more evenly and is, therefore, less likely to set too quickly and crack.

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• According to Strabala, Burj Khalifa was designed based on the 73 floor Tower Palace Three, an all-residential building in Seoul.

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• Under normal conditions, when all building maintenance units are operational, it takes 36 workers three to four months to clean the entire exterior.

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• The firm had designed the Sears Tower in Chicago, a previous record holder for the world’s tallest building.

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Observation Decks

The design is reminiscent of Frank Lloyd Wright’s vision for The Illinois, a mile-high skyscraper designed for Chicago, as well as Chicago’s Lake Point Tower. When Adrian Smith was conceiving the project at SOM, he looked out his office window toward Lake Point Tower’s curved three-wing layout and thought, “There’s the prototype”. According to Strabala, Burj Khalifa was designed based on the 73 floor Tower Palace Three, an all-residential building in Seoul.

BASE jumping

At the centre of the park is the water room, which is a series of pools and water jet fountains. It opened the 148th floor SKY level at 555 m (1,821 ft), giving it the highest observation deck in the world on 15 October 2014. However, in June 2016 the Shanghai Tower opened with an observation deck at a height of 561 metres, thus taking the title of the world’s highest observation deck. A 304-room Armani Hotel, the first of 4 by Armani, occupies 15 of the lower 39 floors.

Observation deck

The building is named after the former president of the United Arab Emirates (UAE), Sheikh Khalifa bin Zayed Al Nahyan.
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Architecture and design

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The air conditioning system draws air from the upper floors where the air is cooler and cleaner than on the ground. The tower was known as Burj Dubai (“Dubai Tower”) until its official opening in January 2010. The Emaar New Year’s Eve fireworks celebration originated in 2010 with the inauguration of the world’s tallest building, Burj Khalifa.
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Features

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Emaar Properties also engaged GHD, an international multidisciplinary consulting firm, to act as an independent verification and testing authority for concrete and steelwork. Burj Khalifa uses the bundled tube design of the Willis Tower, invented by Fazlur Rahman Khan. Due to its tubular system, proportionally only half the amount of steel was used in the construction, compared to the Empire State Building. Khan’s contributions to the design of tall buildings have had a profound impact on architecture and engineering. It would be difficult to find any worldwide practices in the design of tall buildings that have not been directly or indirectly influenced by his work.