For a long time, mankind has been thinking of making a device for transporting heavy objects to build works such as pyramids, etc., for this purpose, devices that are very similar to modern cranes have been invented and used. A lift is a machine that acts as a lift It does a good job of raising and lowering on a vertical surface. Different types of lifts are used to lift heavy objects. The lift can undoubtedly be called the most important part of the crane system, because the lifters carry out the task of lifting and lowering the load. The crane hoist raises and lowers the loads by using a drum or a wheel in which the towing wire or any chain is wrapped. The hoists are either fixed in a fixed point that only performs the up and down operation. or placed on the horizontal beam (the main beam of the crane) which, in addition to moving up and down, also move left and right. The elevators used for this purpose must be equipped with a trolley or carriage. In single-bridge cranes, the hoists are equipped with trolleys to move under one beam, but in double-bridge cranes, the hoists are equipped with carriages to move on two main beams (main bridges).