Features
    Trade Fact Of The Week
    Ten of the world's twenty tallest buildings have opened since 2010.
    May 24, 2013

    THE NUMBERS: World’s tallest buildings, 2700 BC – present

    2018?: “Kingdom Tower,” Jeddah: ” ~3,280 feet
    2010: Burj Khalifa, Dubai 2,716 feet
    2004: Taipei 101, Taiwan 1,666 feet
    1998: Petronas Towers, Kuala Lumpur 1,482 feet
    1974: Sears Tower, Chicago 1,450 feet  
    1972: World Trade Center, New York 1,368 feet
    1931: Empire State Building, New York 1,250 feet
    1930: Chrysler Building, New York 1,046 feet
    1913: Woolworth Building, New York 792 feet
    1909: Met Life Tower, New York 700 feet
    1908: Singer Building, New York 612 feet
    1901: City Hall, Philadelphia 548 feet
    1311: Lincoln Cathedral, U.K. 525 feet?
    2570 BC: Great Pyramid, Egypt 481 feet
    2650 BC: Step Pyramid, Egypt 203 feet

    WHAT THEY MEAN:

    With the spike placed on top two weeks ago, World Trade Center 1 reaches 1776 feet above the Battery Park traffic at its base. The tallest building in the western hemisphere, it also outdoes all of East Asia’s record-holders, and ranks 3rd in the world behind the 2,716-foot Burj Khalifa in the United Arab Emirates and the 1,972-foot Makkah Clock Tower in Saudi Arabia. In its spirit, some background on supertalls and the architectural-technology context for WTC-1:

    Stone-on-stone buildings can rise a bit above 500 feet. But if they go much higher, the weight of the stone will crack the load-bearing pillars and walls below. This is why the 481-foot Great Pyramid outside Cairo held the world’s-tallest-building title for 3,800 years, until slightly overtopped by Europe’s 14th-century Gothic cathedrals. The cathedrals in their turn remained unchallenged until the early 20th century,* when Chicago engineers devised the steel-skeleton frame, in which curtain walls are held in place by steel girders. The Empire State Building is a particularly stunning example: built without computers, riveted in place by Mohawk workers standing in open air 1000 feet above the ground, and with entirely new internal water-tanks to ensure that top-floor toilets flushed and faucets spouted water rather than sucking air, the ESB held the world’s-tallest title for 40 years. At 82 years old, it is one of only 9 pre-1990s buildings still on the top-100 list.

    Computer-aided design and new alloys gave architects another 1000 feet of space, metal and glass in the 1990s. The result has been a bloom of giant buildings, first appearing in Asia and more recently in the Persian Gulf. With WTC-1 complete, according to New York’s Council on Tall Buildings and Urban Habitat, 69 of the world’s 100 tallest buildings have gone up since 2000, and 10 of the top 20 since 2010. Burj Khalifa in Dubai is largest of the group; more than twice the height of the Empire State Building at 2,716 feet or 828 meters, it features 162 floors, a spiral shape to minimize wind torque, heat-resistant glass on the upper levels, and a mix of glazed aluminum and stainless steel on the outer walls. A still larger one just beginning construction, the Kingdom Tower in Jeddah, will if completed reach about 3280 feet, with a big outdoor terrace shaped like a spoon at 2,000 feet.

    * Or, if you define ‘building’ a bit more broadly, until the two big 19th-century towers, the 555-foot George Washington Monument and the 916-foot Eiffel Tower, went up in 1884 and 1889.

    FURTHER READING:

    WTC-1, opening officially (when the interiors are done) sometime later this year: http://onewtc.com/news/final-section-of-spire-installed-at-one-world-trade-center

    And the 9/11 Memorial below: www.911memorial.org

    Tallest buildings -

    New York’s Council on Tall Building and Urban Habitat, the authority on this sort of thing, has lists of the 100 tallest buildings, the 100 tallest under construction, and more: http://buildingdb.ctbuh.org/?list=1

    The first skyscraper – The Woolworth Building opened in New York on April 24, 1913: http://skyscraper.org/EXHIBITIONS/WOOLWORTH/video_intro.php

    Current record-holder – Burj Khalifa: http://www.burjkhalifa.ae/

    And coming next – The Kingdom Tower breaks ground: http://www.thenational.ae/thenationalconversation/industry-insights/property/saudi-shoots-for-the-stars-as-1km-tall-kingdom-tower-set-to-rise

    The American role -

    With WTC-1 essentially complete, only 4 of the tallest 100 buildings in the world under construction are in the U.S.. Of the rest, 56 are in China, 10 in the United Arab Emirates, 7 in India, 5 in Saudi Arabia, and 4 in Russia. (None are in western Europe, and one in Latin America.) Is the U.S. exiting the supertall world? In fact, having invented skyscrapers 100 years ago, architectural firms based in Chicago and New York have not given up at all, and remain the leading designers today. Four American firms are designing (or jointly designing) nine of the highest ten buildings currently under construction:

    Kohn Pedersen Fox, NYC: Ping An Financial Center, Lotte World Tower in Seoul, CTF Guangzhou, Zhongguo Zun in Beijing, and Chongqing International Commerce Center,;
    Adrian Smith & Gordon Gill, Chicago: Wuhan Greenland Center;
    M. Arthur Gensler, San Francisco: Shanghai Tower,
    Skidmore, Owens, & Merrill, Chicago: Tianjin Chow Tai Fook, and Busan Lotte, after also designing the Shanghai World Financial Center, Burj Khalifa, and WTC-1.

    Kohn Pederson Fox on giant skyscrapers: http://www.kpf.com/projectlist.asp?T=14

    And a brief survey of three earlier tall-building eras:

    Pyramids & Ziggurats, Middle East, 2600 BC – 2000 BC: Pyramid-building began around 2650 BC with the 203-foot Step Pyramid designed by proto-engineer Imhotep for then-Pharaoh Zoser, peaked a century later with Khufu’s Great Pyramid just outside modern Cairo. The G.P. held the world’s-tallest title for just under 4000 years. Not just a lame pile of rocks, it is a “smart pyramid” with a complex interior design of chambers, tunnels, and ventilation shafts meant for practical, religious, and perhaps astronomical purposes, all pointing to sophisticated architectural drafting and engineering, as well as agricultural wealth and human muscle. Old Kingdom builders completed at least 118 pyramids (at current count), finishing up around 2300 BC.

    The slightly younger ziggurats in neighboring Sumer and Akkad (modern Iraq) were built along similar plans but had temples on top. They made out of brick rather than stone, so never got quite as high as the Egyptian pyramids. A big one dug up in the 1920s, built in Ur near today’s Nasiriyah, was about 100 feet high and went up in 2100 BC. Native American pyramids in Cahokia, Teotihuacan, Tenochtitlan, and Peru, built at various times from 200 AD to the 1500s, reached similar heights.
    The BBC’s ”Building the Great Pyramid” feature: http://www.bbc.co.uk/history/ancient/egyptians/great_pyramid_01.shtml

    Should you be traveling to Khuzestan this summer, visit the Chogha-Zanbil ziggurat, said (by Wikipedia) to be especially well preserved: http://www.chogha-zanbil.com/

    Cahokia Mounds in Illinois: http://www.cahokiamounds.org/explore/

    Gothic Cathedrals, Europe, 1200 – 1400: Large buildings with enormous glass windows, hundred-foot stone pillars, and flying buttresses to relieve stress on load-bearing walls. Medieval architects and engineers built cathedrals not only without computers but sans printing press, standardized weights and measures, rulers, or arithmetical tools beyond long division. They overtook the Great Pyramid in the 14th century and remain the tallest stone-on-stone buildings in the world, except for the 548-foot Philadelphia City Hall. The Lincoln Cathedral, completed in 1311, is said to been highest, with a central spire rising to 525 feet. Nobody knows for sure, because the spire fell down during a thunderstorm in 1549. The largest cathedral spire still standing is the 512-foot Ulm Cathedral in Germany.

    The Ulm Munster, nur auf deutsch: http://www.ulmer-muenster.de/

    A how-to-build-a-Gothic cathedral book: http://www.amazon.com/Gothic-Cathederal-Christopher-Wilson/dp/0500276811

    And Philly’s City Hall: http://www.phila.gov/virtualch//index.html

    Skyscrapers, United States, 1908 – 1931: Steel-skeleton buildings surpassed cathedrals 103 years ago with the completion of the Singer Building in New York City. The Otis hydraulic elevator system made sure people could get to the top floors. The 1913 Woolworth Building was the first really big one, well beyond the reach of masonry architecture. The Empire State Building opened on May 1, 1931, and held the world’s-tallest-building record for 41 years, longer than any other modern building.   Some New York City highlights:

    The Empire State Building: http://esbnyc.com/esb_story.asp

    The Mohawk Nation’s high-altitude construction tradition: http://www.wnyc.org/articles/wnyc-news/2012/mar/19/sky-walking-raising-steel-mohawk-ironworker-keeps-tradition-alive/

    And back to WTC-1: http://onewtc.com/news/final-section-of-spire-installed-at-one-world-trade-center