Saturday, February 1, 2014

World tallest buildings and structures


Currently the world's tallest man-made structure is the 829.8 m (2,722 ft) tall Burj Khalifa in Dubai, United Arab Emirates. The building gained the official title of "Tallest Building in the World" at its opening on January 4, 2010.

The Council on Tall Buildings and Urban Habitat, an organization that certifies buildings as the "World’s Tallest", recognizes a building only if at least fifty percent of its height is made up of floor plates containing habitable floor area. Structures that do not meet this criterion, such as the CN Tower, are defined as "towers".

There are dozens of radio and television broadcasting towers which measure over 600 metres (about 2,000 ft) in height, and only the tallest are recorded in publicly available information sources.


When assessing the placings of structures, there is some debate about:
  • whether a building is actually a building
  • whether a structure under construction should be included in the list
  • whether a building or structure has to be officially opened before it is included on the list.
  • whether structures rising out of water should have their below-water height included.
  • what should be counted as a building or a tower, and what is being measured.
  • for towers, whether guy-wire-supported structures should be counted.

For buildings, there is debate over:
  • whether only habitable height is considered
  • whether communication towers with observation galleries should be considered "habitable" in this sense
  • whether rooftop antennas, viewing platforms or any other architecture that does not form floors, walls and rooms, i.e. not built as an occupiable room, should be considered towards height of building
  • what would stop a room built on top of a telecommunications or viewing tower from changing the tower's class to that of "building"
  • why a building that is not officially opened should be excluded from the ranks of tallest buildings
  • what counts as an official opening


Tallest man-made structures sorted out by category

This category does not require the structure be "officially" opened.

The tallest man-made structure is Burj Khalifa, a skyscraper in Dubai that reached 829.8 m (2,722 ft) in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA. That September it officially surpassed Poland's 646.38 m (2,120.7 ft) Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure ever built. Guyed lattice towers such as these masts had held the world height record since 1954.

The CN Tower in Toronto, Canada, standing at 553.3 m (1,815 ft), was formerly the world's tallest completed freestanding structure on land. Opened in 1976, it was surpassed in height by the rising Burj Khalifa on September 12, 2007. It has the world's highest public observation deck at 446.5 m (1,465 ft).

The Petronius Platform stands 610 m (2,000 ft) off the sea floor leading some, including Guinness World Records 2007, to claim it as the tallest freestanding structure in the world. However, it is debated whether underwater height should be counted in the same manner as height below ground is ignored on buildings. The Troll A platform is 472 m (1,549 ft), without any part of that height being supported by wires. The tension-leg type of oil platform has even greater below-water heights with several examples more than 1,000 m (3,300 ft) deep. However, these platforms are not considered constant structures as the vast majority of their height is made up of the length of the tendons attaching the floating platforms to the sea floor. Despite this, Guinness World Records 2009 listed the Ursa tension leg platform as the tallest structure in the world with a total height of 1,306 m (4,285 ft). The Magnolia Tension-leg Platform in the Gulf of Mexico is even taller with a total height of 1,432 m (4,698 ft).

Taipei 101 in Taipei, Taiwan, set records in three of the four skyscraper categories at the time it opened in 2004; at the time the Burj Khalifa opened in 2010 it remained the world's tallest inhabited building 509.2 m (1,671 ft) as measured to its architectural height (spire). The height of its roof 449.2 m (1,474 ft) and highest occupied floor 439.2 m (1,441 ft) had been surpassed by the Shanghai World Financial Center with corresponding heights of 487 m (1,598 ft) and 474 m (1,555 ft) respectively. Willis Tower (formerly Sears Tower) was highest in the final category: the greatest height to top of antenna of any building in the world at 527.3 m (1,730 ft).

Burj Khalifa broke the height record in all four categories for completed buildings by a wide margin.
Due to the disagreements over how to measure height and classify structures, engineers have created various definitions for categories of buildings and other structures. One measure includes the absolute height of a building, another includes only spires and other permanent architectural features, but not antennas. The tradition of including the spire on top of a building and not including the antenna dates back to the rivalry between the Chrysler Building and 40 Wall Street. A modern-day example is that the antenna on top of Willis Tower (formerly Sears Tower) is not considered part of its architectural height, while the spires on top of the Petronas Twin Towers are counted.
Note: The following table is a list of the tallest structure in each of the categories below. There can only be one structure in each category, unless the title for the tallest is a draw.


Category
Structure
Country
City
Height (metres)
Height (feet)
Year Built
Coordinates
Skyscraper
829.8
2,722
2010
Self supporting tower
Japan
Tokyo
634
2,080
2011
United States
628.8
2,063
1963
Clock building
601
1,972
2011
Mast radiator
United States
458
1,503
1962
Malaysia
Kuala Lumpur
452
1,482
1998
Kazakhstan
Ekibastusz
419.7
1,377
1987
Israel
Dimona
400
1,312
2008
Ukraine
Kiev
385
1,263
1973
China
370
1,214
2009
Partially guyed tower
Netherlands
IJsselstein
366.8
1,203
1961
Ukraine
Vinnytsia
354
1,161
1961
Bridge pillar
France
Millau
342
1,122
2004
Tower for scientific research
Russia
Obninsk
315
1,034
1958
Hungary
Szigetszentmiklós-Lakihegy
314
1,031
1968
Dam
China
305
1,001
2013
Morocco
Casablanca
210
689
1993
210
689
2012
India
Kalisindh
202[8]
663
2012
United States
192
630
1965
Main tower of Kuwait Towers
187
614
1979
Wooden structure
United States
180
600
1980
United States
178.3
585
1919
Canada
Montreal
175
574
1976
United States
173.7
570
1939
United States
Chicago
173
568
1924
Italy
Torino
167
548
1889
Masonry building
United States
Philadelphia
167
548
1901
Singapore
Singapore
165
541.3
2008
Flagpole, free-standing
Tajikistan
165[9]
541
2011
Germany
Ulm
162
530
1890
Industrial hall
United States
160
525
1966
158
518
1990
Spain
El Escorial
152.4
500
1957
United States
150
492
1963
United States
138.98
456
2005
Egypt
138.8
455.2
2560 BC
Saudi Arabia
Jeddah
133
436
1990[10]
Thailand
Bangkok
132.2
433.7
2006
Statue (including pedestal)
China
128
420
2002
Thailand
Nakorn Pathom
127
417
1870
Ireland
Dublin
121.2
393
2003
Germany
Frankfurt
120
394
1961
Wooden lattice tower
Poland
Gliwice
118
387
1935
Aerial tramway support tower
Austria
Kaprun
113.6
373
1966
Sweden
Stockholm
85
279
1989
Brick lighthouse
Italy
Genoa
77
253
1128
India
76
249
2008
Church of the Holy Archangels[11]
Romania
72
236
1766


Tallest buildings sorted out by category

Prior to 1998, the tallest building status was determined by the height of the building to the top of its architectural elements including spires, but not including "temporary" structures (such as antennae or flagpoles), which could be added or changed relatively easily without requiring major changes to the building's design. Other criteria for height measurement were not used. For this reason, the originally 1451 foot (442.1 meter) to rooftop or 1518 feet with original antennas Willis Tower (formerly Sears Tower) was generally accepted as being the tallest building continuously after its completion in 1973, and being taller than both World Trade Center towers, in spite of the fact the 1 World Trade Center Tower (North Tower) possessed a higher pinnacle absolute height after it added its 360-foot (110m) radio antenna (total height of 1727 feet or 526.3 meters) in 1978. The 1 World Trade Center building maintained a higher absolute height to antenna top until the Sears Tower enlarged its own radio antenna in 2000 to a total height of 1730 feet. However, the Willis Tower was always considered the taller building because it still possessed a greater height to its architectural top (1451 feet vs. 1362 feet), and thus its status as the world's tallest was generally not contested.

Other historic cases in which a building with a taller absolute pinnacle height was not considered the tallest building include, in 1905 when the former New York Times building or The Times Square Building (at 229 West 43rd Street in New York) was completed at 111 m (363 ft) to the roof with 128 m (420 ft) including a flagpole. That building was never considered to be taller than the 119 m (391 ft) high then-current record-holder Park Row Building of New York because a flagpole is not an integral architectural part of a building.

Prior to 1998 the tallest building status had been contested on occasion, but the disputes did not result in a change of the criteria used to determine the world's tallest building. A famous historical case of this discrepancy was the rivalry between The Trump Building (then known as the Bank of Manhattan Building) and the Chrysler Building. The Bank of Manhattan Building employed only a short spire and was 927 ft (283 m) tall and had a much higher top occupied floor (the second category in the 1996 criteria for tallest building). In contrast, the Chrysler Building employed a very large 125-foot (38 m) spire secretly assembled inside the building to claim the title of world's tallest building with a total height of 1048 feet (319 m), despite having a lower top occupied floor and a shorter height when both buildings' spires are not counted in their heights. Upset by Chrysler’s victory, Shreve & Lamb, the consulting architects of Bank of Manhattan building, wrote a newspaper article claiming that their building was actually the tallest, since it contained the world's highest usable floor. They pointed out that the observation deck in the Bank of Manhattan Building was nearly 100 feet (30 m) above the top floor in the Chrysler Building, whose surpassing spire was strictly ornamental and essentially inaccessible. However, the Chrysler Building was generally accepted as the tallest building in the world despite their protests.

However, none of the previous discrepancies or disputes in criteria to measure height (spires vs antennae, absolute pinnacle height vs. architectural height, height of highest occupied floor, etc.) resulted in the controversy that occurred upon the completion of the Petronas Towers in Kuala Lumpur, Malaysia in 1998. The Petronas Towers possessed a higher architectural height (spires, but not antennae), but a lower absolute pinnacle height and lower top occupied floor than the previous record-holder Willis Tower in Chicago, United States. Counting buildings as structures with floors throughout, and with antenna masts excluded, Willis Tower was still considered the tallest at that time. When the Petronas Twin Towers were built, controversy arose because their spires extended nine metres higher than the roof of Willis Tower. Excluding their spires, the Petronas Towers are not taller than Willis Tower. At their convention in Chicago, the Council on Tall Buildings and Urban Habitat (CTBUH) found the Willis Tower to be the third-tallest building, and the Petronas Towers to be the world's tallest buildings. This decision caused a considerable amount of controversy in the news media because this was the first time a country outside the United States had held the world’s tallest building record. Therefore, the CTBUH revised their criteria and defined four categories in which the world's tallest building can be measured, by retaining the old criterion of height to architectural top and added three new categories
  1. Height to Architectural Top (including spires and pinnacles, but not antennas, masts or flagpoles). This measurement is the most widely used and is used to define the rankings of the 100 Tallest Buildings in the World.
  2. Highest Occupied Floor
  3. Height to Top of Roof - omitted from criteria from November 2009 onwards
  4. Height to Tip
The height to roof criterion was discontinued because relatively few modern tall buildings possess flat rooftops, making this criterion difficult to determine and measure. The CBTUH has further clarified their definitions of building height, including specific criteria concerning subbasements and ground level entrances (height measured from lowest, significant, open-air, pedestrian entrance rather than from a previously undefined "main entrance"), building completion (must be topped out both structurally and architecturally, fully clad, and able to be occupied), condition of the highest occupied floor (must be continuously used by people living or working and be conditioned, thus including observation decks, but not mechanical floors) and other aspects of tall buildings.

The height is measured from the level of the lowest, significant, open-air, pedestrian entrance. At the time, the Willis Tower held first place in the second and third categories, the Petronas Towers held the first category, and the 1 World Trade Center building held the fourth with its antenna height to top of pinnacle.  In 2000, however, a new antenna mast was placed on the Willis Tower, giving it hold of the fourth category. On April 20, 2004, Taipei 101 in Taipei, Taiwan, was completed. Its completion gave it the world record for the first three categories. On July 21, 2007 it was announced that Burj Khalifa had surpassed Taipei 101 in height, reaching 512 m (1,680 ft).

Since being completed in early 2010, Burj Khalifa leads in all categories (the first building to do so). With a spire height of 829.8 m (2,722 ft), Burj Khalifa surpassed Taipei 101 as the tallest building to architectural detail and the Willis Tower as the tallest building to tip. It also leads in the category of highest occupied floor.

Before Burj Khalifa was completed, Willis Tower led in the fourth category with 527 m (1,729 ft), previously held by the World Trade Center until the extension of the Chicago tower's western broadcast antenna in 2000, over a year prior to the World Trade Center's destruction in 2001. Its antenna mast included, One World Trade Center measured 526 m (1,726 ft). The World Trade Center became the world's tallest buildings to be destroyed or demolished; indeed, its site entered the record books twice on September 11, 2001, in that category, replacing the Singer Building, which once stood a block from the World Trade Center site. A different superlative for skyscrapers is their number of floors. The World Trade Center set that at 110, and this was not surpassed for nearly four decades until the Burj Khalifa, which opened in 2010.

Structures such as the CN Tower, the Ostankino Tower and the Oriental Pearl Tower are excluded from these categories because they are not "habitable buildings", which are defined as frame structures made with floors and walls throught.


Date (Event)
Architectural top
Highest occupied floor
Roof
Tip
2010: Burj Khalifa completed
Burj Khalifa
Burj Khalifa

Burj Khalifa
2009: CTBUH omits Height to Roof category
Taipei 101
Shanghai World Financial Center

Willis Tower
Taipei 101
Shanghai World Financial Center
Shanghai World Financial Center
Willis Tower
2003: Taipei 101 completed
Taipei 101
Taipei 101
Taipei 101
Willis Tower
2000: Willis Tower antenna extension
Petronas Towers
Willis Tower
Willis Tower
Willis Tower
1998: Petronas Towers completed
Petronas Towers
Willis Tower
Willis Tower
World Trade Center
1996: CTBUH defines categories
Willis Tower
Willis Tower
Willis Tower
World Trade Center


World's tallest freestanding structure on land

Freestanding structures include observation towers, monuments and other structures not generally considered to be "Habitable buildings", but excludes supported structures such as guyed masts and ocean drilling platforms.

The world's tallest freestanding structure on land is defined as the tallest self-supporting man-made structure that stands above ground. This definition is different from that of world's tallest building or world's tallest structure based on the percentage of the structure that is occupied and whether or not it is self-supporting or supported by exterior cables. Likewise, this definition does not count structures that are built underground or on the seabed, such as the Petronius Platform in the Gulf of Mexico. Visit world's tallest structure by category for a list of various other definitions.

As of May 12, 2008, the tallest freestanding structure on land is the Burj Khalifa in Dubai, United Arab Emirates. The building, which now stands at 829.8 m (2,722 ft), surpassed the height of the previous record holder, the 553.3 m (1,815 ft) CN Tower in Toronto, Ontario, on September 12, 2007. It was completed in 2010, and was topped out at 829.8 m (2,722 ft) in January 2009.

 
Record from
Record held (years)
Name and Location
Constructed
Height (metres)
Height (feet)
Coordinates
Notes
c. 2650 BC
40
c. 2650 BC
62
203

c. 2610 BC
5
Meidum Pyramid in Egypt
c. 2610 BC
93.5
307
Shortly after completion Meidum Pyramid collapsed due to bad design/instability and is now 65 m (213 ft).
c. 2605 BC
5
Bent Pyramid in Egypt
c. 2605 BC
101.1
332
Angle of slope decrease during construction to avoid collapse.
c. 2600 BC
40
Red Pyramid of Sneferu, Egypt
c. 2600 BC
105
345

c. 2560 BC
3871
c. 2560 BC
146
481
By 1439, the Great Pyramid had eroded to a height of approximately 139 m (456 ft).
 1311
238
Lincoln Cathedral in England
1092–1311
160
525
The central spire was destroyed in a storm in 1549. While the reputed height of 525 ft (160 m) is accepted by most sources,[21][22][23][24][25][26] others consider it doubtful[27]
1549
98
1384–1478
151
495
The spire burnt down after a lightning strike in 1647. The height is 104 m (341 ft) .
1647
227
1439
142
469
By 1439, the Great Pyramid had eroded to a height of approximately 139 m (456 ft) hence Strasbourg Cathedral was higher .
1874
2
St. Nikolai in Hamburg, Germany
1846–1874
147
483

1876
4
Cathédrale Notre Dame in Rouen, France
1202–1876
151
495

1880
4
Cologne Cathedral in Germany
1248–1880
157
515

1884
5
Washington Monument in Washington D.C., United States
1884
169
555
The world's tallest all-stone structure, as well as the tallest obelisk-form structure.
1889
41
Eiffel Tower in Paris, France
1889
300
986
First structure to exceed 300 metres in height. The addition of a telecommunications tower in the 1950s brought the overall height to 324 m (1,063 ft).
1930
1
Chrysler Building in New York, United States
1928–1930
319
1,046

1931
36
Empire State Building in New York, United States
1930–1931
381
1,250
First building with 100+ storeys. The addition of a pinnacle and antennas later increased its overall height to 448.7 m (1,472 ft). This was subsequently lowered to 443.1 m (1,454 ft).
1967
8
Ostankino Tower in Moscow, Russia
1963–1967
537
1,762
Remains the tallest in Europe. Fire in 2000 led to extensive renovation.
1975
32
CN Tower in Toronto, Canada
1973–1976
553
1,815
Remains the tallest in the Western Hemisphere
2007
7
Burj Khalifa in Dubai, United Arab Emirates
2004–2009
829.8
2,722
Holder of world's tallest freestanding structure. Topped out at 829.8 m (2,722 ft) in 2009.



Tallest structures, freestanding structures, and buildings

The list categories are:
  • The structures (supported) list uses pinnacle height and includes architectural structures of any type that might use some external support constructions like cables and are fully built in air. Only the three tallest are listed, as more than fifty US TV masts have stated heights of 600–610 metres (1969–2000 ft).
  • The structures (media supported) list uses pinnacle height and includes architectural structures of any type that are not totally built in the air but are using support from other, denser media like salt water. All structures greater than 500 metres (1,640 ft) are listed.
  • The freestanding structures list uses pinnacle height and includes structures over 400 metres (1,312 ft) that do not use guy-wires or other external supports. This means truly free standing on its own or, in similar sense, non-supported structures.
  • The building list uses architectural height (excluding antennas) and includes only buildings, defined as consisting of habitable floors. Both of these follow CTBUH guidelines. All supertall buildings (300 m and higher) are listed.

Notes:
  • Eight buildings appear on the freestanding structures category list with heights different from another category. This is due to the different measurement specifications of those lists.
  • Only current heights and, where reasonable, target heights are listed. Historical heights of structures that no longer exist, for example, for having collapsed, are excluded.


Rank
Name and location
Year
completed
Architectural top (metres)
Architectural top
(feet)
Floors

Structures (supported)
1
KVLY-TV mast, Blanchard, North Dakota, United States
1963
629
2,064
2
KXJB-TV mast, Galesburg, North Dakota, United States
1998
628
2,060
3
KXTV/KOVR Tower, Walnut Grove, California, United States
2000
625
2,051

Structures (media supported)
1
Petronius Platform, Gulf of Mexico
2000
610
2,000
2
Baldpate Platform, Gulf of Mexico
1998
580
1,900
3
Bullwinkle Platform, Gulf of Mexico
1989
529
1,736

Freestanding structures
1
Burj Khalifa, Dubai, United Arab Emirates
2010
829.8
2,722
163
2
Tokyo Sky Tree, Tokyo, Japan
2011
634
2,080
3
Abraj Al Bait, Mecca, Saudi Arabia
2011
601
1,972
120
4
Canton Tower, Guangzhou, China
2010
600
1,969
5
CN Tower, Toronto, Ontario, Canada
1976
553
1,814
6
One World Trade Center, New York City, USA
2013
546.2
1,792
104
7
Ostankino Tower, Moscow, Russia
1967
540
1,770
8
Willis Tower, Chicago, United States
1974
527
1,729
108
9
Taipei 101, Taipei, Taiwan
2004
509
1,670
101
10
2008
492
1,614
101
11
2010
484
1,588
118
12
Oriental Pearl Tower, Shanghai, China
1994
468
1,535
13
John Hancock Center, Chicago, United States
1969
457
1,499
100
14
Petronas Tower I, Kuala Lumpur, Malaysia
1998
452
1,483
88
Petronas Tower II, Kuala Lumpur, Malaysia
1998
452
1,483
88
15
Zifeng Tower, Nanjing, China
2009
450
1,480
89
16
Empire State Building, New York City, United States
1931
443
1,453
102
17
Milad Tower, Tehran, Iran
2007
435
1,427
18
Kuala Lumpur Tower, Kuala Lumpur, Malaysia
1995
421
1,381
19
Jin Mao Building, Shanghai, China
1998
421
1,381
88
20
Chimney of GRES-2 Power Station, Ekibastuz, Kazakhstan
1987
420
1,380
21
2003
415
1,362
88
22
1991
415
1,362
23
Central TV Tower, Beijing, China
1992
405
1,329
Buildings
1
Burj Khalifa, Dubai, United Arab Emirates
2010
828
2,717
163
2
Abraj Al Bait, Mecca, Saudi Arabia
2011
601
1,972
120
3
One World Trade Center, New York City, USA
2013
541.3
1,776
104
4
Taipei 101, Taipei, Taiwan
2004
509
1,670
101
5
2008
492
1,614
101
6
2010
484
1,588
118
7
Petronas Towers, Kuala Lumpur, Malaysia
1998
452
1,483
88
8
Zifeng Tower, Nanjing, China
2009
450
1,480
89
9
Willis Tower, Chicago, United States
1974
442
1,450
108
10
Jin Mao Building, Shanghai, China
1998
421
1,381
88
11
2003
415
1,362
88
12
CITIC Plaza, Guangzhou, China
1997
391
1,283
80
13
Shun Hing Square, Shenzhen, China
1996
384
1,260
69
14
Empire State Building, New York City, United States
1931
381
1,250
102
15
Central Plaza, Hong Kong
1992
374
1,227
78
16
1990
367
1,204
70
17
Bank of America Tower, New York City, United States
2008
366
1,201
54
18
Almas Tower, Dubai, United Arab Emirates
2008
360
1,180
74
19
Emirates Office Tower, Dubai, United Arab Emirates
2000
355
1,165
54
20
Tuntex Sky Tower, Kaohsiung, Taiwan
1997
348
1,142
85
21
Aon Center, Chicago, United States
1973
346
1,135
83
22
The Center, Hong Kong
1998
346
1,135
73
23
John Hancock Center, Chicago, United States
1969
344
1,129
100
24
Rose Tower, Dubai, United Arab Emirates
2007
333
1,093
72
Shimao International Plaza, Shanghai, China
2006
333
1,093
60
25
Minsheng Bank Building, Wuhan, China
2007
331
1,086
68
25
Ryugyong Hotel, Pyongyang, North Korea (topped out)
1992
330
1,080
105
2008
330
1,080
74
27
Q1, Gold Coast, Australia
2005
323
1,060
78
28
Burj Al Arab, Dubai, United Arab Emirates
1999
321
1,053
60
29
Chrysler Building, New York City, United States
1930
319
1,047
77
Nina Tower I, Hong Kong
2007
319
1,047
80
New York Times Building, New York City, United States
2007
319
1,047
52
32
Bank of America Plaza, Atlanta, United States
1992
312
1,024
55
33
U.S. Bank Tower, Los Angeles, United States
1989
310
1,020
73
34
Menara Telekom, Kuala Lumpur, Malaysia
2001
310
1,020
55
35
Jumeirah Emirates Towers Hotel, Dubai, United Arab Emirates
2000
309
1,014
56
36
One Island East, Hong Kong
2008
308
1,010
70
37
AT&T Corporate Center, Chicago, United States
1989
307
1,007
60
38
The Address Downtown Burj Khalifa, Dubai, United Arab Emirates
2008
306
1,004
63
39
JPMorgan Chase Tower, Houston, United States
1982
305
1,001
75


Currently under construction and on-hold (2014.)

Numerous supertall skyscrapers are in various stages of proposal, planning, or construction. Each of the following are under construction and, depending on the order of completion, could become the world's tallest building or structure in at least one category:
  • Kingdom Tower Is currently under construction in Saudi Arabia, scheduled to be completed in 2019. It will be the first building to ever reach a height of 1 kilometer, and will also become the tallest building in the world.
  • India Tower is on-hold in Mumbai's Marine Lines, is expected to be 720 m (2,360 ft) tall. This tower will be used for hotel and residential. Construction was started in 2010[30] and expected to complete by 2016.[31][32]
  • The Pingan International Finance Centre, under construction in Shenzhen, is expected to be 648 m (2,126 ft). Completion is expected in 2015.
  • The Shanghai Tower, under construction in Shanghai, next to the Shanghai World Financial Center and the Jin Mao Building, is expected to be 632 m (2,073 ft). Completion is expected in 2014.
  • One World Trade Center, topped-out in New York City, at 1,776 ft (541 m) will become the tallest building in the United States. Also, it will become the world's tallest all-office building and the tallest outside the middle east.
  • Construction of the Pentominium, in Dubai, is currently on hold. If construction resumes, the building is expected to be 516 m (1,693 ft) tall with 120 floors, which would make it the tallest all-residential building in the world. Construction began in 2007, but was halted in August 2011.

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