Used Potain Tower Cranes Fairfield

There are several commercial and industrial buildings that now surpass 60 stories or more. These buildings all require tall cranes to be able to help transport the supplies to the upper floors. There are cranes that are operated from the rear of trucks or other kinds that have their own vehicle connected. Tower cranes are the biggest kinds on the market.

Tower cranes are the stand-alone structures that are often seen on high-rise building projects. Normally, they are part of a major city's downtown skyline. Wherever new construction such as apartment buildings and skyscrapers and commercial facilities such as shopping center are being built, chances are a crane would be on site.

Types
The two major kinds of cranes can be distinguished by the manner in which their jib or boom lifts materials. The jib is the metal frame which extends from the main section. On a flat tower crane, the jib remains horizontal when it carries items. On a luffing type of tower crane, the jib can ratchet to upward or downward angles. The lifting capacity for both kinds could range from 30,000 lbs. to 10,000 lbs.

Body
The crane's body is composed of a mast. This is a vertical steel frame that is a combination of separate sections. In order to increase the overall height of the equipment, sections are added. 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 driver of the crane works from inside of the tower.

Lift
The crane utilizes a braided metal cord to be able to raise materials. This cord extends out from a motor located next to 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 which 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 heavy supplies are carried.

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