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  2. Crane (machine) - Wikipedia

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

    A telescopic mobile crane with truss luffing jib. A telescopic crane has a boom that consists of a number of tubes fitted one inside the other. A hydraulic cylinder or other powered mechanism extends or retracts the tubes to increase or decrease the total length of the boom. These types of booms are often used for short term construction ...

  3. Container crane - Wikipedia

    en.wikipedia.org/wiki/Container_crane

    A modern container crane capable of lifting two 20-foot (6.1 m) long containers at once (end to end) under the telescopic spreader will generally have a rated lifting capacity of 65 tonnes. Some new cranes have a 120-tonne load capacity, enabling them to lift up to four 20-foot (6.1 m) or two 40-foot (12 m) containers.

  4. Mobile crane - Wikipedia

    en.wikipedia.org/wiki/Mobile_crane

    In 1959 crane expert R.H.Neal, hydraulics specialist F.Taylor, and design director Bob Lester, integrated all three and modernized cranes. The Coles Hydra Speedcrane appeared in 1962, further modified with the 10-ton fully telescopic hydraulic boom in 1966, followed in 1968 by the 30-ton "Husky" military versions with four-wheel drive. In 1972 ...

  5. Telescoping (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Telescoping_(mechanics)

    Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...

  6. Telescopic cylinder - Wikipedia

    en.wikipedia.org/wiki/Telescopic_cylinder

    Telescopic cylinders are also referred to as telescoping cylinders and multi-stage telescopic cylinders. An application for telescopic cylinders commonly seen is that of the dump body on a dump truck used in a construction site. In order to empty the load of gravel completely, the dump body must be raised to an angle of about 60 degrees.

  7. $62,500 in OSHA fines appealed in 2023 Harbor Bridge ... - AOL

    www.aol.com/62-500-osha-fines-appealed-102620277...

    A concrete bucket that fell from a 450-foot tower crane sticks out of the ground at a Harbor Bridge construction site on April 22, 2023, in Corpus Christi, Texas.

  8. Level luffing crane - Wikipedia

    en.wikipedia.org/wiki/Level_luffing_crane

    A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [ 1 ] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.

  9. Gantry crane - Wikipedia

    en.wikipedia.org/wiki/Gantry_crane

    A gantry crane is a crane built atop a gantry, which is a structure used to straddle an object or workspace. They can range from enormous "full" gantry cranes, capable of lifting some of the heaviest loads in the world, to small shop cranes, used for tasks such as lifting automobile engines out of vehicles.

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