Potain Tower Cranes Long Beach

There are several commercial and industrial buildings that now surpass 60 stories or more. These buildings all need tall cranes to be able to help move the materials to the higher floors. There are cranes that have their own vehicle connected or other types that are operated from the back of trucks. Tower cranes are the largest types 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 such as skyscrapers or apartment buildings and commercial facilities like shopping center are being constructed, chances are a crane would be on site.



Kinds

The two major kinds of cranes could be differentiated by the way in which their jib or boom raises supplies. The jib is the metal frame which extends from the main section. On a flat tower crane, the jib remains horizontal as it carries items. 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 30,000 lbs. to 10,000 lbs.



Body

The crane's body is composed of a vertical steel mast which is composed of separate [parts. The sections are added to be able increase the overall height of the machinery. The mast extends upward to where the desired height is, to the control module, that 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

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

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