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  2. List of tallest twin buildings and structures - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_twin...

    Tallest twin buildings in the world. The term twin towers in architecture refers to two tall structures with nearly identical characteristics and similar height, usually constructed close to each other and part of a single complex. The charts below lists most twin and other multi-column structures with similar characteristics.

  3. List of tallest freestanding structures - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest...

    Tallest structure in the United Kingdom. Eiffel Tower: 330 1,083 1889 Lattice tower Observation, restaurant, UHF/VHF-transmission France Paris Tallest structure in the world from 1889 to 1930; first structure to exceed 300 metres in height. Ryugyong Hotel: 330 1,083 1992 Skyscraper North Korea Pyongyang: Chimney of Ekibastuz GRES-1: 330 1,083 1982

  4. List of tallest buildings in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings...

    Prior to the September 11 attacks in New York City, the twin towers of the first World Trade Center occupied the second and third positions on the list below. The North Tower (1 WTC) stood at 1,368 feet (417 m), while the South Tower (2 WTC) was 1,362 feet (415 m) tall, then surpassed only by the Willis Tower at 1,450 feet (442 m).

  5. List of twin structures - Wikipedia

    en.wikipedia.org/?title=List_of_twin_structures&...

    Pages for logged out editors learn more. Contributions; Talk; List of twin structures

  6. List of twin structures in the world - Wikipedia

    en.wikipedia.org/?title=List_of_twin_structures...

    Pages for logged out editors learn more. Contributions; Talk; List of twin structures in the world

  7. List of tallest towers - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_towers

    The Tokyo Skytree in Tokyo, Japan has been the tallest tower since 2012.. This list includes extant structures that fulfill the engineering definition of a tower: "a tall human structure, always taller than it is wide, for public or regular operational access by humans, but not for living in or office work, and which is self-supporting or free-standing, meaning no guy-wires for support."

  8. List of tallest buildings in New York City - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings...

    The history of skyscrapers in New York City began with the construction of the Equitable Life, Western Union, and Tribune buildings in the early 1870s. These relatively short early skyscrapers, sometimes referred to as "preskyscrapers" or "protoskyscrapers", included features such as a steel frame and elevators—then-new innovations that were used in the city's later skyscrapers.

  9. Double tee - Wikipedia

    en.wikipedia.org/wiki/Double_tee

    Double-tee roof structure of an indoor swimming pool. In non-residential buildings, the roof structure may be flat. Structural concrete is an alternative for flat roof construction. There are three main categories for such method: precast/prestressed, cast-in-place and shell. Within the precast/prestressed concrete roofing, the double tees are ...