Used Potain Tower Cranes Roseville

Several commercial and industrial buildings could reach heights of over 60 stories. Apparently, when these buildings are being constructed, they need equally tall cranes to transport the supplies to the higher floors. There are cranes which are operated from the rear of trucks or other types that have their own vehicle attached. Tower cranes are the largest types on the market.

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

Types
The two key types of cranes can be differentiated by the way in which their boom or jib lifts supplies. The jib is the metal frame that extends from the main section. On a flat tower crane, the jib remains horizontal when it carries things. On a luffing type of tower crane, the jib could ratchet to upward or downward angles. The lifting capacity for both types could vary from 30,000 lbs. to 10,000 lbs.

Body
The body of the crane is composed of a vertical steel mast that is composed of separate sections. The sections are added to be able increase the overall height of the machinery. The mast extends upward to wherever the desired height is, to the control module, that is a small room that 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
In order to lift supplies, 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 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 has weights. These weights help to prevent the crane from tipping over when heavy supplies are carried.

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