Burj Khalifa

Burj Khalifa

Burj Khalifa (Arabic: برج خليفة‎ "Khalifa Tower"),[8] known as Burj Dubai prior to its inauguration, is a skyscraper in Dubai, United Arab Emirates, and is the tallest manmade structure in the world, at 829.84 m (2,723 ft).[3][8] Construction began on 21 September 2004, with the exterior of the structure completed on 1 October 2009. The building officially opened on 4 January 2010,[1][9] and is part of the new 2 km2 (490-acre) flagship development called Downtown Dubai at the 'First Interchange' along Sheikh Zayed Road, near Dubai's main business district. The tower's architecture and engineering were performed by Skidmore, Owings and Merrill of Chicago, with Adrian Smith as chief architect, and Bill Baker as chief structural engineer.[10][11] The primary contractor was Samsung C&T of South Korea.[12]
The total cost for the project was about US$1.5 billion; and for the entire "Downtown Dubai" development, US$20 billion.[13] In March 2009, Mohamed Ali Alabbar, chairman of the project's developer, Emaar Properties, said office space pricing at Burj Khalifa reached US$4,000 per sq ft (over US$43,000 per m²) and the Armani Residences, also in Burj Khalifa, sold for US$3,500 per sq ft (over US$37,500 per m²).[14]
The project's completion coincided with the global financial crisis of 2007–2012, and with vast overbuilding in the country, this led to high vacancies and foreclosures.[15] With Dubai mired in debt from its huge ambitions, the government was forced to seek multibillion dollar bailouts from its oil-rich neighbor Abu Dhabi. Subsequently, in a surprise move at its opening ceremony, the tower was renamed Burj Khalifa, said to honour the UAE President Khalifa bin Zayed Al Nahyan for his crucial support.[16]
Due to the slumping demand in Dubai's property market, the rents in the Burj Khalifa plummeted 40% some ten months after its opening. Out of 900 apartments in the tower, around 825 were still empty at that time.[17][18]

Construction & Interier

Burj Dubai (Arabic: برج دبي "Dubai Tower") is a supertall skyscraper currently under construction in Dubai, United Arab Emirates. When it is completed in late 2008, it is predicted to be the tallest man-made structure in the world, as well as the tallest building by any measure. Scheduled for occupancy in September 2009, the building is part of a 2 km² (0.8 sq mi) development called 'Downtown Burj Dubai' and is located at the "First Interchange" (aka "Defence Roundabout") along Sheikh Zayed Road at Doha Street.

The building is being built mainly by a South Korean company Samsung, along with the Belgian company Besix and the UAE company Arabtec. It was designed by American Adrian Smith before he left Skidmore, Owings and Merrill LLP (SOM) of Chicago to start his own independent practice, Adrian Smith + Gordon Gill Architecture in October 2006. However, SOM continues to lead the architectural, structural engineering and mechanical engineering of Burj Dubai. The total budget for the Burj Dubai project is about $4.1 billion US and for the entire new 'Downtown Burj Dubai', $20 billion US.

Height

Current height and time line of events
As of 24 October 2007, Burj Dubai's official website reported its height to be 585.7 m (1,922 ft), with 156 completed stories.

Burj Dubai's last two milestones will be to surpass the 628.8 m (2,063 ft) height of the KVLY-TV Mast in North Dakota, United States to become the world's tallest structure, and to pass the Warsaw radio mast in Gąbin, Poland (646.4 m (2,121 ft) until it collapsed in 1991) to become the world's tallest structure of any type ever built.

September 21, 2004
Emaar contractors begin construction of Burj Dubai.
February 2007
Burj Dubai surpasses the Sears Tower as the building with the most floors.
May 13, 2007
Burj Dubai sets record for vertical concrete pumping on any building at 452 m (1,483 ft), surpassing the 449.2 m (1,474 ft) to which concrete was pumped during the construction of Taipei 101.[5]
July 21, 2007
Burj Dubai becomes the tallest building on Earth surpassing Taipei 101 which stands at a height of 509.2 m (1,671 ft).[6] The previous day, the head of the Council on Tall Buildings and Urban Habitat (CTBUH), Antony Wood, had confirmed that it "surpassed the height of Taipei 101 structurally (concrete)." [7] However, he also added "We will not classify it as a building until it is complete, clad and at least partially open for business to avoid things like the Ryungyong [sic] project. Taipei 101 is thus officially the world's tallest until that happens."
August 12, 2007
Burj Dubai surpassed the height of the Sears' Tower antenna which stands at a height of 527.3 m (1,730 ft).
September 3, 2007
Burj Dubai becomes the second-tallest freestanding structure, surpassing the 540 m (1,772 ft) Ostankino Tower in Moscow, Russia.
September 12, 2007
At 555.3 m (1,822 ft), Burj Dubai becomes the world's tallest freestanding structure, surpassing the CN Tower in Toronto, Canada.[8]

Current records
Note: As indicated above, the CTBUH does not recognise records for buildings still under construction, therefore some of those records are unofficial:

Tallest freestanding structure: 585.7 meters (1,922 ft) (previously CN Tower - 553.3 m (1,815 ft))
Building with most floors: 156 (previously Sears Tower / World Trade Center - 110)
Vertical concrete pumping (for a building): 601.0 m (1,972 ft) (previously Taipei 101 - 449.2 m (1,474 ft))
Vertical concrete pumping (for any construction): 601.0 m (1,972 ft) (previously Riva del Garda Hydroelectric Power Plant - 532 m (1,745 ft)[9])



  Essential Architecture-  Dubai
Burj Dubai

architect

Architect Skidmore, Owings and Merrill
Contractor Samsung
Besix Arabtec
Developer Emaar
location

located at the "First Interchange" (aka "Defence Roundabout") along Sheikh Zayed Road at Doha Street.
date

Groundbreaking 21 September 2004, Estimated completion 30 December 2008
style

Modern
construction

Height
Antenna/Spire ~818 m (2,684 ft)
Roof ~643.3 m (2,111 ft)
Top floor ~624.1 m (2,048 ft)
Technical details
Floor count 164 [1]
Floor area 334,000 m² (3,595,100 sq ft)
type

Armani Hotel  (the first of its kind) will occupy the lower 37 floors.
Floors 45 through 108 will have 700 private apartments
Corporate offices and suites will fill most of the remaining floors, except for a 123rd floor lobby and 124th floor (about 440 metres (1,444 ft)) indoor/outdoor observation deck.
 
 
 
 
 
 
 
 
Burj Dubai (Arabic: برج دبي "Dubai Tower") is a supertall skyscraper currently under construction in Dubai, United Arab Emirates. When it is completed in late 2008, it is predicted to be the tallest man-made structure in the world, as well as the tallest building by any measure. Scheduled for occupancy in September 2009, the building is part of a 2 km² (0.8 sq mi) development called 'Downtown Burj Dubai' and is located at the "First Interchange" (aka "Defence Roundabout") along Sheikh Zayed Road at Doha Street.

The building is being built mainly by a South Korean company Samsung, along with the Belgian company Besix and the UAE company Arabtec. It was designed by American Adrian Smith before he left Skidmore, Owings and Merrill LLP (SOM) of Chicago to start his own independent practice, Adrian Smith + Gordon Gill Architecture in October 2006. However, SOM continues to lead the architectural, structural engineering and mechanical engineering of Burj Dubai. The total budget for the Burj Dubai project is about $4.1 billion US and for the entire new 'Downtown Burj Dubai', $20 billion US.

Height

Current height and time line of events
As of 24 October 2007, Burj Dubai's official website reported its height to be 585.7 m (1,922 ft), with 156 completed stories.

Burj Dubai's last two milestones will be to surpass the 628.8 m (2,063 ft) height of the KVLY-TV Mast in North Dakota, United States to become the world's tallest structure, and to pass the Warsaw radio mast in Gąbin, Poland (646.4 m (2,121 ft) until it collapsed in 1991) to become the world's tallest structure of any type ever built.

September 21, 2004
Emaar contractors begin construction of Burj Dubai.
February 2007
Burj Dubai surpasses the Sears Tower as the building with the most floors.
May 13, 2007
Burj Dubai sets record for vertical concrete pumping on any building at 452 m (1,483 ft), surpassing the 449.2 m (1,474 ft) to which concrete was pumped during the construction of Taipei 101.[5]
July 21, 2007
Burj Dubai becomes the tallest building on Earth surpassing Taipei 101 which stands at a height of 509.2 m (1,671 ft).[6] The previous day, the head of the Council on Tall Buildings and Urban Habitat (CTBUH), Antony Wood, had confirmed that it "surpassed the height of Taipei 101 structurally (concrete)." [7] However, he also added "We will not classify it as a building until it is complete, clad and at least partially open for business to avoid things like the Ryungyong [sic] project. Taipei 101 is thus officially the world's tallest until that happens."
August 12, 2007
Burj Dubai surpassed the height of the Sears' Tower antenna which stands at a height of 527.3 m (1,730 ft).
September 3, 2007
Burj Dubai becomes the second-tallest freestanding structure, surpassing the 540 m (1,772 ft) Ostankino Tower in Moscow, Russia.
September 12, 2007
At 555.3 m (1,822 ft), Burj Dubai becomes the world's tallest freestanding structure, surpassing the CN Tower in Toronto, Canada.[8]

Current records
Note: As indicated above, the CTBUH does not recognise records for buildings still under construction, therefore some of those records are unofficial:

Tallest freestanding structure: 585.7 meters (1,922 ft) (previously CN Tower - 553.3 m (1,815 ft))
Building with most floors: 156 (previously Sears Tower / World Trade Center - 110)
Vertical concrete pumping (for a building): 601.0 m (1,972 ft) (previously Taipei 101 - 449.2 m (1,474 ft))
Vertical concrete pumping (for any construction): 601.0 m (1,972 ft) (previously Riva del Garda Hydroelectric Power Plant - 532 m (1,745 ft)[9])

Projected height


Projected height of the completed Burj Dubai, compared to the height of some other well known tall buildings.

The projected final height of Burj Dubai is officially being kept a secret due to competition from other buildings under construction or proposed; however, figures released by a contractor on the project have suggested a height of around 818 m (2,684 ft).[10] Based on this height, the total number of habitable floors is expected to be around 160. However, when pressed for a more precise figure, the project manager merely repeated that he was able only to guarantee that the final height would be higher than 700 m (2,297 ft), and it would be the world's tallest free-standing structure when completed.

History of height increases
Though unconfirmed, Burj Dubai has been rumoured to have undergone several height increases since its inception. Originally proposed as a virtual clone of the 560 m (1,837 ft) Grollo Tower proposal for Melbourne, Australia's Docklands waterfront development, the tower was redesigned with an original design by Skidmore Owings and Merrill (SOM) seen above and discussed below. This design should put it at approximately 705 m (2,313 ft). Contradictory information abounds regarding the official height of the building, which is to be expected, considering the building seeks to acquire the designation as the world's tallest structure upon completion in 2009. One website[11] mentions a rumoured final height of 916 m (3,005 ft) in a September 28, 2006 posting, but this is contradicted by a September 20, 2006 article listing a height over 940 m (3,084 ft).[12]

The design architect, Adrian Smith, felt that the upper-most section of the building did not culminate elegantly with the rest of the structure, so he sought and received approval to increase it to the currently planned height. It has been explicitly stated that this change did not include any added floors,[13], which is fitting with Smith's attempts to make the crown more slender. However, the top of the tower, from the 156th floor onward or from 585.7 m (1,922 ft) to the top, will be a steel frame structure, unlike the lower portion's reinforced concrete. The developer, Emaar, has stated this steel section may be extended to beat any other tower to the title of tallest; however, once the tower is complete the height cannot be changed.

Competition with other projects
Several other major projects in the region may vie for the title of "tallest structure". These other projects are in various states of planning and/or construction.

One of Burj Dubai's potential competitors is the proposed Murjan Tower, in Manama, Bahrain. Designed by the Danish architects Henning Larsens Tegnestue A/S, it is expected to be 1,022 m (3,353 ft) in height with 200 floors.[14]

Also potentially competing with Burj Dubai is the proposed 1,001 m (3,284 ft) Burj Mubarak al-Kabir to be erected in Kuwait as part of a massive development project called Madinat al-Hareer ("City of Silk"). The project also includes an Olympic stadium, residences, hotels, and retail facilities. However, the project may take 25 years to complete.[15]

Another proposed tower which may surpass the height of Burj Dubai, is Al Burj ("The Tower"). If built, it will form the centrepiece of Dubai Waterfront, the world's largest waterfront development situated only 50 km (31 mi) from the Burj Dubai site. Speculation has suggested various heights between 700 m (2,297 ft) and 1,200 m (3,937 ft), but the developer is keeping the final height tightly under wraps.

Architecture and design
The tower is being constructed by a South Korean company, Samsung Engineering & Construction [16] which built the Petronas Twin Towers and the Taipei 101. The tower is designed by Skidmore, Owings and Merrill, who also designed the Sears Tower in Chicago and the Freedom Tower in New York City, among numerous other famous high-rises. The building resembles the bundled tube form of the Sears Tower, but is not a tube structure. The design of Burj Dubai is reminiscent of the Frank Lloyd Wright vision for The Illinois, a mile high skyscraper designed for Chicago, Illinois. Burj Dubai is expected to rise to 150% of the height of the Sears Tower. Emaar has also engaged GHD [17] , an international multidisciplinary consulting firm, to assist with the design, review and assessment involved in the construction process.

CONSTUCTION

 

Chrome, that is the color of the Burj Dubai. Where the color on the renderings of the American architecture office Skidmore Owings & Merrill (SOM) was already a shiny gray, the façade that is being build is even more polished. Like a mirror. Or better: Like reflective sunglasses. That could be a nice metaphor for the façade; sunglass.

The paradox can hardly be more extreme; to build a skyscraper totally clad in glass on a location with a temperature in August between 30 and 47.5 degrees Celsius. It is one of the hottest places on earth. No wonder all native Dubai fleas the city every summer for cooler cities like Geneva.

The designing of a glass façade that can withstand such heat must have been a great challenge, and the result is pretty dramatic. When looking at the amazing photographs that Imre Solt made for the special website that tracks the building process, it struck me that from the outside one really cannot look through the glass. Not even a bit. I know normally a glass façade doesn’t reveal that much either in daylight, but one can always recognize something like a curtain. Here there is just nothing.

It is said that the three-wing layout of the building has been inspired by the Hymenocallis flower, which can also be found in Dubai. A very contextual iconography. I can’t however suppress the thought that this concept is afterthought to sell the design to the public. It makes a nice story; it shows virtue. Maybe that is also element of architectural practice one should learn at school; making up afterthoughts!

With its current height of 600 meters the Burj Dubai is already the highest building on earth, the highest structure even. And that with concrete! I read though that the actual top of the building that contains an antenna is going to be made of steel. The exact height of the building when finished is yet to be officially revealed. It reads on Wikipedia that it will be 816 meters, but it might just be more. What suspense!

About the program of the Burj Dubai we know the first 37 floors will be occupied by the first Armani Hotel. The next 68 floors will house 700 apartments. Offices occupy the rest of the tower, about 57 floors. Furthermore the 123rd and 124th floor will be used as lobby and observation deck. A nice feature: on the 78th floor there will be an outdoor swimming pool. That is at a height of 200 meters! 

After saying: ‘It is the highest building on the globe’, there is not much more one can ask. It is one of those answers to all questions. The awe is just too much.

To disturb you just a last note: Look how the building-mass develops to create that height, getting step-by-step slimmer. In comparison the American skyscrapers look boxy, plump and fat. The Burj Dubai is slender and elegant. The future looks great!

And the glitter of the façade is indeed a tight representation of the glamour inside.