Council on Tall Buildings and Urban Habitat

Featured Buildings Involving BLWTL

4 World Trade Center

4 World Trade Center, New York City

Part of the new World Trade Center complex, 4 World Trade Center stands on the southeast corner of the site, where the original once stood.

Absolute Towers

Absolute Towers, Mississauga

The Absolute World Towers are the result of a public-private partnership and an international design competition, which chose a new Chinese firm doing its first work in North America.

Aqua Tower

Aqua Tower, Chicago

The signature cantilevered balconies are breathtaking and exemplary of where concrete technology can take tall building design today.

Cayan Tower

Cayan Tower, Dubai

Standing at over 300 meters, Cayan Tower stood as the world's tallest high rise building with a twist of 90 degrees when it was completed in 2013.

Comcast Center

Comcast Center, Philadelphia

Taking the form of a faceted obelisk, the tower is clad in silvery high-performance glass with ultra-clear, low-iron glass at the building’s corners and crown.

Courtyard & Residence Inn Manhattan/Central Park

Courtyard & Residence Inn Manhattan/Central Park, New York City

This Midtown hotel consists of two independent hotels vertically stacked and separated by a sky lobby.

Etihad Towers

Etihad Towers, Abu Dhabi

The Etihad Towers complex includes five residential towers situated in the beachside Al Ras Al Akhdar district, and offer panoramic views over the city and Arabian Sea.

Kingdom Centre

Kingdom Centre, Riyadh

Below the observation deck is an inverted parabolic arch that occupies the top third of the skyscraper creating its iconic status in the city.

Palazzo Lombardia

Palazzo Lombardia, Milan

The Palazzo Lombardia is a confident and controlled execution of what is actually an exuberant plan, and it does so while quietly integrating sustainable strategies.

Shanghai Tower

Shanghai Tower, Shanghai

As the third tower in the trio of supertall buildings at the heart of Shanghai’s new Lujiazui Finance and Trade Zone, Shanghai Tower embodies a new prototype for tall buildings.

Shanghai World Financial Center

Shanghai World Financial Center, Shanghai

The Shanghai World Financial Center has become an icon of Shanghai and China, with its clear and elegant form and revolutionary structural design.

The Bank of America Tower

The Bank of America Tower, New York City

The Bank of America Tower at One Bryant Park produces a high level of sustainability within the commercial market place, creating a strong identity for itself.

The Index

The Index, Dubai

The Index is a model for developing sustainable built environments in the Middle East region, as well as other similar climatic environments elsewhere in the world.

The John Hancock Center

The John Hancock Center, Chicago

Over forty years after its completion, the John Hancock Center has established itself as one of the world’s most recognized skyscrapers and an iconic example.

The Tower at PNC Plaza

The Tower at PNC Plaza, Pittsburgh

The Tower at PNC Plaza incorporates both highly technical green systems and channels for meaningful social interactions through a vertical column of two-story atriums.

Torre Reforma

Torre Reforma, Mexico City

The Torre Reforma is Mexico's tallest building and features a versatile, column-free interior that incorporates natural energy-reducing elements and a structurally expressive exterior.

See all Featured Tall Buildings Globally


As a leader in wind engineering for the past 40 years, Boundary Layer Wind Tunnel Laboratory has worked with engineers, architects and developers from all over the globe. Since its inception in 1965, the Laboratory has worked on over one thousand projects.

Their mission is to develop innovative solutions to complex wind engineering problems while maintaining the highest standards in research, education, and engineering applications.

They have developed many of, what are now, wind engineering's standard methods, such as the force balance measurement of loads on tall buildings. They have assisted in the design of some of the world's tallest buildings and structures, the world's longest bridges, and roofs of unusual construction and form.

Visit official website

BLWTL Connected Global News

Chicago’s Iconic John Hancock Center to Hit the Market in Late Summer

Chicago’s Iconic John Hancock Center to Hit the Market in Late Summer

18 May 2017, Chicago – The John Hancock Center could be getting a new owner – and maybe even a new name. A…

New Observatory Attractions Planned as Part of Renovation of Chicago’s Willis Tower

New Observatory Attractions Planned as Part of Renovation of Chicago’s Willis Tower

23 Mar 2017, Chicago – The owners of Chicago’s tallest building are exploring several thrilling enhancements…

City Officials Reveal $500 Million Plans to Rejuvenate Chicago’s Willis Tower

City Officials Reveal $500 Million Plans to Rejuvenate Chicago’s Willis Tower

1 Feb 2017, Chicago – City officials have released renderings of proposed improvements for Willis Tower…

Read more Global News in connection with BLWTL

BLWTL Connected Global News

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Chicago’s Iconic John Hancock Center to Hit the Market in Late Summer
18 May 2017 – Chicago, United States
The John Hancock Center could be getting a new owner – and maybe even a new name. A Chicago-based developer plans to put the tower's office space, parking garage, and…
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New Observatory Attractions Planned as Part of Renovation of Chicago’s Willis Tower
23 Mar 2017 – Chicago, United States
The owners of Chicago’s tallest building are exploring several thrilling enhancements for the Willis Tower's Skydeck, including a rappelling station and a “Ledgewalk."…
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City Officials Reveal $500 Million Plans to Rejuvenate Chicago’s Willis Tower
1 Feb 2017 – Chicago, United States
City officials have released renderings of proposed improvements for Willis Tower, Chicago's tallest building. The $500 million plans include six floors of new retail, an…
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CTBUH Names Shanghai Tower “Best Tall Building Worldwide” for 2016
4 Nov 2016 – Shanghai, China
The CTBUH Awards Jury has named Shanghai Tower, Shanghai, China the title of “Best Tall Building Worldwide” at the 15th Annual CTBUH Awards Ceremony and Dinner,…
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73-Story Office Tower Up for Sale in Hong Kong
24 Aug 2016 – Hong Kong, China
A property firm has put up for sale one of its marquee office towers, located in the old Central District of Hong Kong. The Center, a 73-story office building, could…
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Engineering Expert Describes Skyslide Structure on LA’s U.S. Bank Tower
16 Aug 2016 – Los Angeles, United States
The OUE Skyspace is part of a $60 million overhaul of the public areas of the 310-meter U.S. Bank Tower. The renovations include a Skyslide, which starts at the 70th…
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Jin Mao Tower’s New Skywalk Prepares to Open in Shanghai
27 Jul 2016 – Shanghai, China
A skywalk will soon be opening along the outside of the 88th floor of the Jin Mao Tower in Lujiazui. It is thought to be the highest fenceless, all transparent walkway…
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U.S. Bank Tower’s Glass SkySlide Now Open in Los Angeles
28 Jun 2016 – Los Angeles, United States
The U.S. Bank Tower’s new SkySlide – a glass slide suspended 305 meters above downtown Los Angeles – is now open for business. The slide begins on the 70th floor of the…
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The Sky Lobby of Houston’s JPMorgan Chase Tower Now Closed to the Public
22 Jun 2016 – Houston, United States
After years of serving as an unofficial observation point, the 60th-floor Sky Lobby at the JPMorgan Chase Tower in Downtown Houston has recently closed to the public,…
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Chicago’s Iconic John Hancock Center Shopping Naming Rights to Fund Plaza Redevelopment
23 May 2016 – Chicago, United States
The owner of Chicago's John Hancock Center is shopping the naming rights for the 47-year-old skyscraper to pay for a proposed $10 million plaza redevelopment. The deal…
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Shanghai Tower Installs Signboard Commemorating Megatall Status
17 May 2016 – Shanghai, China
The Council on Tall Buildings and Urban Habitat (CTBUH) joined officials of Shanghai Tower in unveiling the commemorative signboard designating Shanghai Tower the tallest…
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World’s Fastest Elevator to be Installed in China’s Tallest Building
12 May 2016 – Shanghai, China
A vertical transportation company has developed what it claims is the world's fastest elevator, featuring a speed of 20.6 meters per second. The company will apply the…
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Shanghai Tower Pays Tribute to Workers with Wall of Honor
29 Apr 2016 – Shanghai, China
The names of over 4,000 workers, designers, and engineers who played a part in the design and construction of Shanghai Tower have been put on a new 60-meter-long Wall of…
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Mexico's Tallest Tower Approaching Completion
18 Mar 2016 – Mexico City, Mexico
Construction is progressing on the 246-meter Torre Reforma – characterized by its diamond-shaped upper portion and concrete cladding on three of its sides – which is set…
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U.S. Bank Tower in Los Angeles Plans Glass-Bottomed “Skyslide”
2 Mar 2016 – Los Angeles, United States
The owners of the U.S. Bank Tower in Los Angeles are building a "Skyslide" as a part of a $50 million "Skyspace" renovation, transforming several floors of the building…
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Shanghai Tower Has Completed, Now the Second-Tallest Building in the World
7 Jan 2016 – Shanghai, China
The CTBUH has recognized the completion of Shanghai Tower, which is now the tallest building in China and the second-tallest building in the world. The tower was finished…
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Downtown Pittsburgh’s Tower at PNC Plaza Set for October First Opening
24 Aug 2015 – Pittsburgh, United States
Downtown Pittsburgh's newest skyscraper is set for an October 1 opening. The date for the opening of the $400 million Tower at PNC Plaza was announced in an invitation…
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“French Spiderman” Scales Dubai’s Cayan Tower
13 Apr 2015 – Dubai, United Arab Emirates
A daredevil climber known as “French Spiderman” scaled the world’s tallest twisted skyscraper without a safety harness. French climber Alain Robert climbed Dubai's 306-…
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Chicago’s Willis Tower Said Put Up For Sale
4 Mar 2015 – Chicago, United States
Chicago’s Willis Tower, once the world’s tallest building and one of the city’s top tourist attractions, is up for sale. The owners have hired a brokerage to market the…
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New Yorkers Can Control Two Skyscraper Lights with Mobile App
21 Aug 2014 – New York City, United States
Developer Douglas Durst is letting New Yorkers have controls to the lights atop two midtown skyscrapers — Bank of America Tower and 4 Times Square. Users can manipulate…
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Makkah Clock Tower in Mecca to Open for Tourists After Hajj
18 Aug 2014 – Mecca, Saudi Arabia
The Makkah Clock Tower, the second tallest building in the world, will open for tourists after Haj 2014, according to officials. Overlooking the Grand Mosque, the Makkah…
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Shanghai Tower Gets Finishing Touch
4 Aug 2014 – Shanghai, China
The final steel beam was installed on China’s soon-to-be tallest building, Shanghai Tower, with the skyscraper reaching its designed height of 632 meters. The 137-story…
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Los Angeles’ Tallest Building to Get Observation Deck
17 Jul 2014 – Los Angeles, United States
The U.S. Bank Tower will soon have an observation deck and sky-high restaurant catering to visitors to downtown Los Angeles. The deck will provide visitors with a…
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John Hancock Center Owners Want to Rock Chicago’s Streets
18 Jun 2014 – Chicago, United States
One of the owners of the John Hancock Center has proposed a glass-enclosed, diamond-shaped structure in front of the skyscraper, in which musicians would entertain crowds…
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Developer Harry Macklowe Buys New York's One Wall Street
23 May 2014 – New York City, United States
Real estate developer Harry Macklowe has purchased One Wall Street, the landmark Art Deco headquarters of the Bank of New York Mellon, securing the winning bid over a…
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Video: Chicago’s John Hancock Center Tilts for Thrills
12 May 2014 – Chicago, United States
Chicago’s John Hancock Center has thrown down the gauntlet when it comes to skyscraper thrills with its newest attraction, Tilt, a window that actually tilts out over the…
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Half-Vacant U.S. Bank Building in L.A. Plans Reuse Reinvention
4 Mar 2014 – Los Angeles, United States
Overseas Union Enterprise, the developer that bought the U.S. Bank Building last year, has hired architecture firm Gensler to adapt the commercial building into a…
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Skyscraper Security Heightened After Unauthorized Shanghai Stunt
17 Feb 2014 – Shanghai, China
The two daredevils who scaled the under-construction 632-meter Shanghai Tower have prompted tighter security controls from tall building owners, who previously authorized…
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Fog Phenomenon Returns to Transform Dubai Skyline
14 Feb 2014 – Dubai, United Arab Emirates
Twice a year, weather conditions generate a cloud-like fog that settles between the ground and sky, which creates a heavenly vision of the world’s tallest skyscraper tips…
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Shanghai Tower Construction Surpasses 600-meter Megatall Measure
28 Jan 2014 – Shanghai, China
Onward and upward, the Shanghai Tower has reached its final stages of construction, exceeding 600 meters, and is set to top off at 632 meters. Shanghai Tower will be one…
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North America’s Tallest Hotel Opens
9 Jan 2014 – New York City, United States
The Marriott Hotel chain has opened what it is calling the “tallest all-hotel building” in North America, at 1717 Broadway in New York. At 754 feet (22.9 7 meters) the…
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Shanghai Tower Plans to Hire Leasing Agent
8 Jan 2014 – Shanghai, China
The state-owned developer of Shanghai Tower, China’s next tallest building, is hiring a leasing agent to sell space in the building, a highly unusual move in China,…
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Hancock Center Considers Tilting Glass Deck Extension
9 Dec 2013 – Chicago, United States
Seeking to boost its visitor levels, Chicago’s John Hancock Center Observatory is considering building The Tilt, a glass-enclosed extension of its 94th-floor viewing area…
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FT Evaluates Shanghai Tower’s Sustainability
26 Nov 2013 – Shanghai, China
A recent article from The Financial Times delves into the Shanghai Tower and its implications to Chinese society and its much-talked-about sustainability. The Shanghai…
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Four World Trade to Open Soon
12 Nov 2013 – New York City, United States
Four World Trade Center, designed by Pritzker Prize-winner Fumihiko Maki, will be the first building at the Ground zero site to open. The ribbon-cutting for Four World…
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Obituary: Paul Reichmann, Canary Wharf Developer
28 Oct 2013 – Toronto, Canada
Paul Reichmann, the Canadian tycoon and creator of Canary Wharf, who has died aged 83, transformed the skyline and economy of London's Docklands. Reichmann and his…
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Aqua Doppel-Gang-er Sprouting in Houston
1 Oct 2013 – Houston, United States
PM Realty has started construction in Houston on a 40-story high-rise which is drawing criticism due to its close resemblance to Studio Gang's famed Aqua Tower in Chicago…
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Video: Shanghai Tower in the Cloud
6 Sep 2013 – Shanghai, China
The Shanghai skyline has been transformed by the recently topped-out Shanghai Tower. At the 2013 Huawei Cloud Congress in Shanghai, chief engineer Qing Ge of Shanghai…
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Shanghai Tower Celebrates Topping Out to Worldwide Fanfare
2 Aug 2013 – Shanghai, China
Topping out ceremonies for the Shanghai Tower were held in the Jujiazui financial hub of Shanghai on August 2. The ¥15 billion (US$2.4 billion) tower, whose concrete core…
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Arup Making a Strong Impact in Mexico City
30 Jul 2013 – Mexico City, Mexico
Arup reports that the company is working on five tall buildings in Mexico City: Torre Manacar, Torre Pedregal 24, Punta Chapultapec, Torre BBVA Bancomer and Torre Reforma…
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John Hancock Center Sale Indicates Depreciated Value
27 Jun 2013 – Chicago, United States
San Antonio-based real estate firm The Lynd Co. and its partners closed a deal for 900,000 square feet (83,000 square meters) of space at the 100-story John Hancock…
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Infinity Tower is Renamed at Opening Ceremonies
11 Jun 2013 – Dubai, United Arab Emirates
The AED1 billion Infinity Tower has been renamed Cayan Tower, after its developer. The name was chosen to end the confusion with the other two Infinity Towers, in…
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Dubai's Infinity Tower Completed
5 Jun 2013 – Dubai, United Arab Emirates
Saudi Arabian developer Cayan Investment & Development will celebrate the inauguration of Dubai's Infinity Tower next Monday, June 10. The 75-story building spirals 90…
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Beloved Chicago Skyscrapers Come to Life in Animation
24 May 2013 – Chicago, United States
Chicago is the birthplace of the skyscraper and artist Al Boardman has created a short film using motion graphics to honor five of the city's notable tall buildings. His…
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Update: Photos Released: Shanghai Tower Reaches 500 Meters
16 Apr 2013 – Shanghai, China
The Shanghai Tower, which is still under construction, reached 501 meters (1,643 feet) April 11, surpassing the neighboring Jin Mao Building and the World Financial…
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Indonesian Investors Buy Half-empty US Bank Tower
12 Mar 2013 – Los Angeles, United States
Los Angeles's US Bank Tower, the tallest building west of the Mississippi, has sold for $367.5 million to Singapore-based hotel and property group Overseas Union…
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Popular Science on Shanghai Tower
19 Feb 2013 – Shanghai, China
The Shanghai Tower, which is slated to be the world's second tallest building upon completion, is featured by Popular Science in a recent article. Engineers involved in…
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CTBUH: Top Ten Tall Building Stories of the Year
21 Dec 2012 – Chicago, United States
This was a pivotal year for the tall building industry, with dramatic projects making headlines around the world. Not only did skylines grow taller, skyscrapers were…
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Willis Tower Exhibit Celebrates Its Omnipresence in the City
19 Oct 2012 – Chicago, United States
A free exhibition of 25 large-scale photographs of Willis Tower made by architectural photographer Mark Ballogg looks to re-examine and revisit the tower's impact on the…
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Future Tallest Hotel Tower Tops Out
5 Oct 2012 – New York City, United States
A new hotel development that will be the tallest hotel building in the Western Hemisphere, 1717 Broadway, has topped out at 753-feet (230-meters), the tower’s developer…
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Shanghai Tower Elevators Receive Three Guinness World Records Following CTBUH Research
1 Jan 1970 – Shanghai, China
In late 2016, the CTBUH confirmed that the elevator systems at Shanghai Tower achieved the following three GUINNESS WORLD RECORDS® titles: Fastest Elevator Travel Speed,…

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Top Company Rankings: The World’s 100 Tallest Buildings

13 Oct 2016, CTBUH Research – The Council is pleased to announce the Top Company Rankings for numerous…

CTBUH 2008 Dubai Conference Silver Sponsor

3-5 Mar 2008, Conference Sponsor – The Congress hosted presentations, seminars and workshops covering…

Alan Davenport

Alan Davenport

CTBUH Advisory Group, 1985 – 1992
London (ON), Canada

CTBUH Resources Involving BLWTL


New CTBUH Monograph on Building Motion, Perception and Mitigation
Feb 2001 – CTBUH 2001 6th World Congress, Melbourne; Nicholas Isyumov & Tony Tschanz, Boundary Layer Wind Tunnel Laboratory
This paper provides an overview of the new Monograph which deals with motions experienced by tall buildings and their impact on design. Of various types of building motions wind-induced vibrations are of greatest concern to designers since they can…

BLWTL Tall Building Facts

150m+ Buildings 42 Completed
300m+ Buildings 23 Completed
Average Building Age 17 Years
Most Common Function office, 22 Buildings
Most Common Material Concrete, 18 Buildings
Building Functions
Building Materials

All building-related facts are for 150m+ buildings currently in the database.

Tall Buildings Involving BLWTL

1   Shanghai Tower 2015 632 m Shanghai
2   Makkah Royal Clock Tower 2012 601 m Mecca
3   Shanghai World Financial Center 2008 492 m Shanghai
4   Willis Tower 1974 442 m Chicago
5   Jin Mao Tower 1999 421 m Shanghai
6   Shun Hing Square 1996 384 m Shenzhen
7   Central Plaza 1992 374 m Hong Kong
8   Bank of China Tower 1990 367 m Hong Kong
9   Bank of America Tower 2009 366 m New York City
10   Emirates Tower One 2000 355 m Dubai
  Completed   Arch. Topped Out   Struct. Topped Out   Under Constr.