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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.
Dock leveler – a height-adjustable platform used as a bridge between dock and truck, can be operated via mechanical , hydraulic, or air powered systems. Dock lift – serves the same function as a leveler, but operates similar to a scissor lift to allow for greater height adjustments.
The Syncrolift shiplift is a piece of equipment for lifting boats, ships and vessels onto land and back at sea for maintenance work or repair.. The vessel is maneuvered over a submerged cradle, which is then lifted by a set of synchronized hoists or winches.
The complete unit is normally mounted on a tripod, and the telescope can freely rotate 360° in a horizontal plane.The surveyor adjusts the instrument's level by coarse adjustment of the tripod legs and fine adjustment using three precision levelling screws on the instrument to make the rotational plane horizontal.
In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses, airports and on roads, highways and other infrastructure.
Grimsby Dock Tower. The first accumulators for William Armstrong's hydraulic dock machinery were simple raised water towers. Water was pumped to a tank at the top of these towers by steam pumps. When dock machinery required hydraulic power, the hydrostatic head of the water's height above ground provided the necessary pressure.
For example, in the Port of London in the United Kingdom, shipping movements in dock complexes, and within a short distance of the outer lock gates (i.e. in the tidal river), are under the jurisdiction of a dockmaster and staff. Each assistant dockmaster has a marine staff of about 70. In all, each dock complex employed about 360 marine staff.
Longshoremen on a New York dock load barrels onto a barge on the Hudson River. Photograph by Lewis Hine, c. 1912. Dockers load bagged cargo onto a barge in Port Sudan, 1960. A dockworker (also called a longshoreman, stevedore, docker, wharfman, lumper or wharfie) is a waterfront manual laborer who loads and unloads ships. [1]
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