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A gin pole is a mast supported by one or more guy-wires that uses a pulley or block and tackle mounted on its upper end to lift loads. The lower end is braced or set in a shallow hole and positioned so the upper end lies above the object to be lifted. The pole (also known as a mast, boom, or spar) is secured with three
A fireman's pole (also called a firefighter's pole, sliding pole or a fire pole) is a pole that firefighters slide down to quickly reach the ground floor of a fire station. This allows them to respond to an emergency call faster, as they arrive at the fire engine faster than by using a standard staircase.
Shear legs are a lifting device related to the gin pole, derrick and tripod (lifting device). Shears are an A-frame of any kind of material such as timbers or metal, the feet resting on or in the ground or on a solid surface which will not let them move and the top held in place with guy-wires or guy ropes simply called "guys".
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Perhaps the best example is "tent pole," a term that refers to a company's most promising or prominent product. Generally, a tent pole generates most of an organization's income, making it ...
A gyn is an improvised three-legged lifting device used on sailing ships. It provides more stability than a derrick or sheers, and requires no rigging for support. Without additional support, however, it can only be used for lifting things directly up and down. Gyns may also be used to support either end of a ropeway. [1]
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