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A telescopic lip (20 or 40 inches) can help to reduce the length of the leveler to 10 feet. Dock levelers (and indeed dock plates and dock boards) are used where a building has a truck-level door, i.e. a door with a floor level roughly at the same height as the floor of the truck's trailer.
Bumpers: Help to prevent the transport vehicle from contacting and damaging the exterior of the building, dock leveler or vehicle restraint. Commonly made from rubber, they range in size, projection and are based on vehicles serviced among other factors. A flexible, less-expensive alternative to a loading dock leveler is a dock plate or dock ...
Whereas "shiplift" is the word that is normally used, the term used by Lloyd's register is "Mechanical Lift Dock". There are two different kinds of platform design, the articulated and the rigid. [1] The articulated platform has hinged connections between the main and the longitudinal beams. A rigid platform, the beams are bolted or welded ...
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.
The tensioned portion of the rope would fasten the ship to the quay, hoist a foresail, lift a spar into position on the mast or be used to transfer cargo to or from a dock or lighter. A capstan is a vertical- axled rotating machine developed for use on sailing ships to multiply the pulling force of sailors when hauling ropes, cables , and hawsers .
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