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The World’s tallest building. A living wonder. A Stunning work of art. An incomparable feat of engineering. Burj Khalifa is all that. In concept and execution, Burj Khalifa has no peer. More than just the world’s tallest building, Burj Khalifa is an unprecedented example of international cooperation, a symbolic beacon of progress, and an emblem of the new, dynamic and prosperous Middle East.

It is also tangible proof of Dubai’s growing role in a changing world. In fewer than 30 years, this city has transformed itself from a regional centre to a global one. This success was not based on oil reserves, but on reserves of human talent, ingenuity and initiative. Burj Khalifa embodies that vision.

Emaar Properties PJSC is the Master Developer of Burj Khalifa and is also one of the largest real estate companies in the world. Mr. Mohamed Alabbar, Chairman of Emaar Properties, said: “Burj Khalifa goes beyond its imposing physical specifications. In Burj Khalifa, we see the triumph of Dubai’s vision of attaining the seemingly impossible and setting new benchmarks. It is a source of inspiration for every one of us at Emaar. The project is a declaration of the Emirate’s capabilities and of the resolve of its leaders and people to work hand-in-hand on truly awe-inspiring projects.

Emaar had but one inspiration, the unflagging enthusiasm set in motion by His Highness Sheikh Mohammed Bin Rashid Al Maktoum, Vice President and Prime Minister of the UAE and Ruler of Dubai, who inspires us to reach for the stars.

Bringing Burj Khalifa to life required a combination of visionary ideals and solid science. In the process, the project amassed an awe-inspiring number of facts, figures, and statistics.

World Records

At over 828 metres (2,716.5 feet) and more than 160 stories, Burj Khalifa holds the following records:

Tallest building in the world

Tallest free-standing structure in the world

Highest number of stories in the world

Highest occupied floor in the world

Highest outdoor observation deck in the world

Elevator with the longest travel distance in the world

Tallest service elevator in the world

Tallest of the Supertall

Not only is Burj Khalifa the world’s tallest building but it has also broken two other impressive records: tallest structure, previously held by the KVLY-TV mast in Blanchard, North Dakota, and tallest free-standing structure, previously held by Toronto’s CN Tower. The Chicago-based Council on Tall Buildings and Urban Habitat (CTBUH) has established 3 criteria to determine what makes a tall building tall. Burj Khalifa wins by far in all three categories.

Height to architectural top

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building. This includes spires but does not include antennae, signage, flagpoles or other functional-technical equipment. This measurement is the most widely used and is used to define the Council on Tall Buildings and Urban Habitat rankings of the Tallest Buildings in the World.

Highest occupied floor

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest continually occupied floor within the building. Maintenance areas are not included.

Height to tip

Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element. This includes antennae, flagpoles, signage and other functional-technical equipment.

Architecture

The architecture features a triple-lobed footprint, an abstraction of the Hymenocallis flower. The tower is composed of three elements arranged around a central core. The modular, Y-shaped structure, with setbacks along each of its three wings, provides an inherently stable configuration for the structure and provides good floor plates for residential. Twenty-six helical levels decrease the cross-section of the tower incrementally as it spirals skyward.

The central core emerges at the top and culminates in a sculpted spire. A Y-shaped floor plan maximizes views of the Arabian Gulf. Viewed from the base or the air, Burj Khalifa is evocative of the onion domes prevalent in Islamic architecture.

Wind Tunnel Testing

Over 40 wind tunnel tests were conducted on Burj Khalifa to examine the effects the wind would have on the tower and its occupants. These ranged from initial tests to verify the wind climate of Dubai, to large structural analysis models and facade pressure tests, to micro-climate analysis of the effects at terraces and around the tower base. Even the temporary conditions during the construction stage were tested with the tower cranes on the tower to ensure safety at all times.

Wind Tunnel Testing

Over 40 wind tunnel tests were conducted on Burj Khalifa to examine the effects the wind would have on the tower and its occupants. These ranged from initial tests to verify the wind climate of Dubai, to large structural analysis models and facade pressure tests, to micro-climate analysis of the effects at terraces and around the tower base. Even the temporary conditions during the construction stage were tested with the tower cranes on the tower to ensure safety at all times.

Stack effect or chimney effect is a phenomenon that affects super-tall building design and arises from the changes in pressure and temperature with height. Special studies were carried on Burj Khalifa to determine the magnitude of the changes that would have to be dealt with in the building design.

Construction

Excavation work began for Burj Khalifa in January 2004 and over the ensuing years to its completion; the building passed many important milestones on its goal to become the tallest man-made structure the world has ever seen. In just 1,325 days since excavation work started in January 2004, Burj Khalifa became the tallest free-standing structure in the world.

Construction Highlights

Over 45,000 m3 (58,900 cu yd) of concrete, weighing more than 110,000 tonnes were used to construct the concrete and steel foundation, which features 192 piles buried more than 50 m (164 ft) deep. Burj Khalifa’s construction will have used 330,000 m3 (431,600 cu yd) of concrete and 39,000 tonnes (43,000 ST; 38,000 LT) of steel rebar, and construction will have taken 22 million man-hours.

The exterior cladding of Burj Khalifa began in May 2007 and was completed in September 2009. The vast project involved more than 380 skilled engineers and on-site technicians. At the initial stage of installation, the team progressed at the rate of about 20 to 30 panels per day and eventually achieved as many as 175 panels per day

The tower accomplished a world record for the highest installation of an aluminium and glass façade with a height of 512 metres. The total weight of aluminium used on Burj Khalifa is equivalent to that of five A380 aircrafts and the total length of stainless steel bull nose fins is 293 times the height of Eiffel Tower in Paris.

In November 2007, the highest reinforced concrete core walls were pumped using 80 MPa concrete from ground level. A vertical height of 601 metres. This smashed the previous pumping record on a building of 470m on Taipei 101; the world’s second tallest tower and the previous world record for vertical pumping of 532 metres for an extension to the Riva del Garda Hydroelectric Power Plant in 1994. The concrete pressure during pumping to this level was nearly 200 bars.

The amount of rebar used for the tower is 31,400 metric tons – laid end to end this would extend over a quarter of the way around the world.

Virtual Tour :

VIEW BURJ KHALIFA: CLICK HERE