The Burj Khalifa is a skyscraper in Dubai ( United Arab Emirates ). Until the inauguration of the building called Burj Dubai ( Arabic برج دبي , Dubai Tower “), since it bears the name of the President of the United Arab Emirates .
The Burj Khalifa was the project company Emaar Properties , designed by architect Adrian Smith from the American architecture firm Skidmore, Owings and Merrill built. Since April 2008 he is the tallest building in the world , the world has the most stories and also the highest usable floor. Construction began in 2004, in January 2009, the final height of 828 meters was reached. The building was on the 4th Inaugurated in January 2010 and has since become the tallest building in the world .
The Burj Khalifa is known by its size to the center of a new urban development area of Dubai, Downtown Dubai will, in which a broad mix of functions such as retail, residential, offices, hotels, shopping, entertainment and leisure activities should be brought together and the one in the next 20 billion years, U.S. dollars to invest.
In the lower 37 floors of the 163 general-purpose The world’s first Armani Hotel is retracted. In the upper floors are 43 offices and some suites . The 123rd Floor is a lobby , the 124th designed as a viewing platform with outdoor terrace – it is 452 meters after the Shanghai World Financial Center ( Shanghai ), the second highest viewing platform in the world.
In January 2011, was in the 122nd Floor, the restaurant At.Mosphere opened, which is based on the number of floors of the world’s highest restaurant.
Due to the slowdown in demand in Dubai house prices in the Burj Khalifa ten months after opening dropped by 40 percent and in October 2010, 825 of 900 apartments were vacant.
The Burj Khalifa has a floor area of 526 760 square meters. For the construction were a total of 330,000 cubic meters of concrete and steel and other materials much needed. Several thousand tons of steel on the upper floors are recycled steel from the demolished Palast der Republik in Berlin . Because of the great height of the deflection the tower at the highest levels of wind around 1.5 meters. Around 200 large and 650 small concrete piles were driven for the construction of the Burj Khalifa in the ground, extending to a depth of about 70 meters below sea level. These ensure that only a small part of the otherwise much diverted to strong compressive forces of the tower on the base of the foundation, while the majority is absorbed by the outer surfaces of the concrete piles by physical friction. for the air conditioning of standing in a desert region of high-rise building are 60 Air ducts installed, including fireplaces in the opposite direction, from top to bottom ( Hot Climate Effect stack effect). In return, against the pressure around the clock hot and accelerated air be exhausted.
The tower was built in a total of 22 million man-hours. At its peak 12,000 workers have participated in the building. Officially it 163 usable floors, , of which 49 floors for offices and 4 levels for the fitness and spa facilities are used. The floors 158-162 are Mohammed Ali Alabbar, the CEO of Emaar Properties , as a personal office space and mosque are available. The remaining floors house a 1044 apartment flats , of which 144 residences in the Armani Residences Dubai are. The top eight floors to the top of the building with a diameter of 1.20 meters can be achieved only via a narrow staircase. They feature electronic control boxes and the maintenance of the antenna comes with the tower a total height of 830 meters.
The Burj Khalifa is of 57 elevators and 8 escalators developed. The head of the main elevators of the building is 504 meters -. More than any other skyscraper in the world Two double-deck elevators lead exclusively to the observation platform at the 124th Floor. Together with the double-deck elevators in the Shanghai World Financial Center, they belong to a speed of 10 meters per second (36 km / h) to the fastest double-deck elevators in the world. The world’s highest lift station with 638 meters located in the Burj Khalifa. A total of 2909 steps lead from the ground to the 160th Floor.
The parking garage in the two floors beneath the building (B1 and B2) is comprised of 3000 car parking spaces.The Dubai Fountain was built in Downtown Burj Dubai in front of the Khalifa, the largest water feature in the world. In Dubai Lake can produce over a length of 250 meters, a water feature up to 1,000 impressions with different water heights 21-150 meters. The competition for the title of tallest building in the world was created twelve kilometers away from the Burj Khalifa. The Nakheel Tower (formerly known as Al Burj called) had been planned with a minimum height of one kilometer (at the peak of the housing bubble should the tower be twice as high as Burj Khalifa, the rival construction company Emaar Properties). Due to the global financial crisis, the preparatory work on the Nakheel Tower were set in March 2009. It is unclear whether and when the work is being continued.