rope guide

They use pulleys to hold the transmission cables. These pulleys are made in different shapes depending on their bedding.

C Rail

Wire towels

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Girder

However, the basis of their work is to get the cable in sinewave and move it along its bed. The spacing of the pulleys depends on the type of cable and its heavy weight.

The spools do the job of changing the force of the towing wire or chains.

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rope

The pulleys are made of a circular, circular-shaped plate in which there is a chained or wire rod in the wall of which the towing wire or chained inside it moves freely.

The diameter of the wire pulleys should be at least 18 to 24 times the diameter of the towing wire. If the diameter of the spool is smaller, it will crush and open the tissue.

 

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first known construction cranes were invented by the Ancient Greeks

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