Potain Tower Cranes San Diego

There are some industrial and commercial buildings which now exceed 60 stories or more. These buildings all need tall cranes to be able to help transport the materials to the upper floors. There are cranes which are operated from the rear of trucks or other kinds which have their own vehicle attached. Tower cranes are the biggest ones on the market.



Tower cranes are the stand-alone structures that are usually found on high-rise building projects. Normally, they are part of a major city's downtown skyline. When new construction like for instance skyscrapers or apartment buildings and commercial facilities like shopping center are being built, chances are a crane will be on site.



Types

There are two different types of cranes: jib crane of the boom crane. The jib is a metal frame that extends from the main section. On a flat tower crane, the jib remains horizontal as it carries things. On a luffing kind of tower crane, the jib could ratchet to upward or downward angles. The lifting capacity for both types can vary from 30 pounds to 10,000 lbs.



Body

The body of the crane is composed of a vertical steel mast that is composed of separate [parts. The sections are added to increase the overall height of the machine. The mast extends upward to wherever the desired height is, to the control module, which is a small room which has glass windows on all four sides or to the tower as it is also called. The operator of the crane works from inside of the tower.



Lift

To raise materials, the crane uses a braided metal cord. The cord extends all the way to the end of the boom or jib from a motor located near the control module. There is a pulley system located at the end of the jib, through which the cord is positioned and lowered down. The jib that holds the cord becomes balanced by a counter jib situated on the opposite side of the tower. The counter jib has weights. These weights help to prevent the crane from tipping over when raising heavy materials.

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