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2. Jackup rig - Wikipedia

   en.wikipedia.org/wiki/Jackup_rig

   Generally jackup rigs are not self-propelled and rely on tugs or heavy lift ships for transportation. Jackup platforms are almost exclusively used as exploratory oil and gas drilling platforms and as offshore and wind farm service platforms. [2] Jackup rigs can either be triangular in shape with three legs or square in shape with four legs. [2]

3. List of boat lifts - Wikipedia

   en.wikipedia.org/wiki/List_of_boat_lifts

   Geheyan dam boat lift, also in Hubei Province, capable of lifting vessels of 300 tons displacement. The dam was completed in 1994, but technical difficulties delayed the opening of the ship lift for four more years. Longtan dam boat lift, capacity to lift vessels of 250 tons, in a basin 40×10.8×1.8 meters, and a vertical lift of 68.5 meters. [2]

4. Boat lift - Wikipedia

   en.wikipedia.org/wiki/Boat_lift

   A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England , rotational, like the Falkirk Wheel in Scotland , or operate on an inclined plane , like the Ronquières inclined plane ...

5. Category:Bridges by structural type - Wikipedia

   en.wikipedia.org/wiki/Category:Bridges_by...

   Vertical lift bridges (4 C, 11 P) Viaducts ... Cantilever spar cable-stayed bridge; ... Pontoon bridge; R. Retractable bridge; S.

6. Moveable bridge - Wikipedia

   en.wikipedia.org/wiki/Moveable_bridge

   September 15, 1958 – Newark Bay, New Jersey rail accident, Elizabethport, New Jersey: Central Railroad of New Jersey (CNJ) commuter train #3314 from Bay Head Junction to Jersey City ran a stop signal and an open derail protecting the Newark Bay 4-span lift bridge, and the train's two diesel locomotives and two of five passenger cars went into ...

7. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   The "hammerhead", or giant cantilever, crane is a fixed-jib crane consisting of a steel-braced tower on which revolves a large, horizontal, double cantilever; the forward part of this cantilever or jib carries the lifting trolley, the jib is extended backwards in order to form a support for the machinery and counterbalancing weight. In addition ...