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Guy-wire
A guy-wire, guy-line, guy-rope or guide-wire, also known as simply a guy, is a tensioned cable designed to add stability to a free-standing structure. They are used commonly in ship masts, radio masts, wind turbines, utility poles, fire service extension ladders used in church raises and tents. A thin vertical mast supported by guy wires is called a guyed mast. One end of the cable is attached to the structure, and the other is anchored to the ground or some other point at a distance from the structure's base. The tension in the diagonal guy-wire, combined with the compressional strength of the structure, allows the structure to withstand lateral loads such as wind or the weight of cantilevered structures. They are often installed radially, at equal angles about the structure, in trios and quads. This allows the tension of each guy-wire to offset the others. For example, antenna masts are often held up by three guy-wires at 120° angles. Structures with lateral loads, such as electrical utility poles, may require only a single guy-wire to offset the lateral pull of the electrical wires. Conductive guy cables for radio antenna masts may disturb the radiation pattern of the antenna, so their electrical characteristics must be included in the design. ==Uses==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Guy-wire」の詳細全文を読む
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