Potain Tower Cranes Oakland

Several commercial and industrial buildings can reach heights of over 60 stories. Obviously, when these buildings are being constructed, they require equally tall cranes to be able to move the supplies to the higher floors. There are cranes which have their own vehicle attached or other kinds which are operated from the back of trucks. Tower cranes are the biggest ones offered on the market.



Tower cranes are stand-alone structures seen as part of a major city's downtown skyline on high-rise building projects. When new construction like skyscrapers or apartment buildings and commercial facilities like shopping center are being constructed, chances are a crane will be on site.



Kinds

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 when 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 could range from 30 pounds to 10,000 lbs.



Body

The crane's body is composed of a vertical steel mast which is composed of individual sections. The parts are added to increase the overall height of the machinery. 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 crane operator works from inside of the tower.



Lift

The crane utilizes a braided metal cord to be able to lift materials. This cord extends out from a motor situated near the control module to the end of the boom or jib. There is a pulley system situated 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 tower's opposite side. The counter jib holds weights. These weights help to prevent the crane from toppling over when raising heavy materials.

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