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2. Hobart Bridge - Wikipedia

   en.wikipedia.org/wiki/Hobart_Bridge

   The Hobart Bridge was of unique design and construction, and the first of its type anywhere in the world. It was a floating bridge with a lift span, constructed of hollow concrete pontoons, 24 in all, connected together forming a crescent shape curved upstream, and anchored in the middle. The bridge was constructed in 12-pontoon sections which ...

3. Pontoon bridge - Wikipedia

   en.wikipedia.org/wiki/Pontoon_bridge

   A pontoon bridge (or ponton bridge), also known as a floating bridge, uses floats or shallow- draft boats to support a continuous deck for pedestrian and vehicle travel. The buoyancy of the supports limits the maximum load that they can carry. Most pontoon bridges are temporary and used in wartime and civil emergencies.

4. Gerald Desmond Bridge - Wikipedia

   en.wikipedia.org/wiki/Gerald_Desmond_Bridge

   62,057 (2012) Location. The Gerald Desmond Bridge was a 1968 through arch bridge that carried five lanes of Ocean Boulevard from Interstate 710 in Long Beach, California, west across the Back Channel to Terminal Island. The bridge was named after Gerald Desmond, a prominent civic leader and former city attorney for the City of Long Beach.

5. Portage Lake Lift Bridge - Wikipedia

   en.wikipedia.org/wiki/Portage_Lake_Lift_Bridge

   Vertical-lift bridge: Total length: 1,310 feet (400 m) Width: both decks: 4 lanes with no shoulders lower deck: single-track railroad was abandoned 1982. Height: 180 ft (55 m) [1] Longest span: 269 ft (82 m) Clearance below: 4 ft (1.2 m) fully lowered 32–36 ft (9.8–11.0 m) raised to intermediate position About 100 ft (30 m) fully raised ...

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7. Semi-submersible platform - Wikipedia

   en.wikipedia.org/wiki/Semi-submersible_platform

   These semi-submersible crane vessels (SSCV) consist of two lower hulls (pontoons), three columns on each pontoon and an upper hull. Shortly after J. Ray McDermott and Saipem also introduced SSCVs, resulting in two new enormous vessels DB-102 (now Thialf ) and Saipem 7000 , capable of lifting respectively 14,200 and 14,000 tons.