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  2. Turnstile - Wikipedia

    en.wikipedia.org/wiki/Turnstile

    A wooden turnstile for keeping livestock penned in (Zwierzyniec, Poland).A circa-1930 turnstile and kiosk at the Bath Recreation Ground. Turnstiles were originally used, like other forms of stile, to allow human beings to pass while keeping sheep or other livestock penned in. [citation needed] The use of turnstiles in most modern applications has been credited to Clarence Saunders, who used ...

  3. List of bridges in the United States by height - Wikipedia

    en.wikipedia.org/wiki/List_of_bridges_in_the...

    The clearance below required under bridges for the largest ships—container ships, ocean liners and cruise ships—is around 220 feet (67 m) so there are often bridges with approximately that height located in coastal cities with bays or inlets, such as New York City's Verrazzano-Narrows Bridge and San Francisco's Golden Gate Bridge. [1]

  4. Platform screen doors - Wikipedia

    en.wikipedia.org/wiki/Platform_screen_doors

    However, these gates are less effective than full platform screen doors in preventing people from intentionally jumping onto the tracks. [14] These gates were first [clarify] in practical use by the Hong Kong MTR on the Disneyland Resort line for the open-air station designs. Most half-height platform edge door designs have taller designs than ...

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  6. List of largest domes - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_domes

    Retractable steel roof (12,500 tonnes of steel). [26] Architects Kisho Kurokawa Architect & Associates, Takenaka Corporation, Satobenec, and Takayama Sogo Kogyo. [27] [27] [28] since 2013 312 1,020 Singapore National Stadium: Singapore: Dragages Retractable roof. Height of dome: 80 m (260 ft). [29] Architect Arup Group. [29

  7. Pontoon bridge - Wikipedia

    en.wikipedia.org/wiki/Pontoon_bridge

    The aluminum half-pontons were 29 feet 7 inches (9.02 m) long overall, 6 feet 11 inches (2.11 m) wide at the gunwales, and 3 feet 4 inches (1.02 m) deep except at the bow where the gunwale was raised. The gunwales were 6 feet 8 inches (2.03 m) center-to-center.

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