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Ore dock
・ Ore extension
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・ Ore genesis
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Ore dock : ウィキペディア英語版
Ore dock

An ore dock is a large structure used for loading ore (typically from railway cars or ore jennies) onto ships which then carry the ore to steelworks or to transshipment points. Most known ore docks were constructed near iron mines on the upper Great Lakes and served the lower Great Lakes. Ore docks still in existence are typically about wide, high, and vary from to in length. They are commonly constructed from wood, steel, reinforced concrete, or combinations of these materials.
They are commonly used for loading bulk ore carriers with high mass, low value ore, such as iron ore, in raw or taconite form.
==Construction ==
The typical construction of an ore dock is a long high structure, with a railway track or tracks along the top with a number of "pockets" into which ore is unloaded from cars, typically by gravity. Each pocket has a chute that can be lowered to discharge the ore into the hold of a ship berthed alongside. The use of pockets and chutes allows loading the dock asynchronously of its discharge into the freighter.
The docks storage bins or pockets typically are wider at the top than the bottom, and lead to movable steel chutes. These chutes project out over the water at a slight angle from the sides of the docks. The hinged chutes, which when lowered allow ore to drop into ships from the pockets, are located at twelve-foot intervals over the length of the dock.
This spacing is not coincidental, as the docks and the lakers they could load evolved together, and laker hatch spacing is typically 12, or on center.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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