Different types of cranes

Published: 27th March 2009
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A Construction Crane is a very important piece of equipment. Without construction cranes large buildings and structures would not be able to be built with such speed and efficiency. Construction crews need an easy and reliable way to lift materials and tools hundreds of feet in the air in order to build skyscrapers. Cranes serve important functions for other industries besides construction. Shipyards and railroads use cranes to load and unload ships and trains with large metal containers packed with products. Construction cranes provide a quick way to move heavy materials around a construction site without the use of manual labor.

There are many different types of cranes. Each crane is suited for a specific type of job and has limitations. Two general categories of construction cranes are mobile and stationary. Truck mounted cranes are cranes that are attached to the back of a truck, which makes relocating the crane very easy. Floating cranes are a type of crane frequently used for bridge construction. The crane is mounted on a floating platform allowing it to work from the waterway the bridge is being built over. A crawler crane has tank like treads that distinguishes it from other mobile cranes. Helicopters are sometimes used as aerial cranes to lift large loads in locations that are impossible to reach using any other type of mobile crane.

Stationary Cranes do not move from where they are set up, and are typically able to lift a more weight than a mobile crane. The most common type of stationary crane is the tower crane. A tower crane is the massive structure usually seen next to a skyscraper being built. A self-erecting crane, also known as a kangaroo crane, lifts its self with hydraulic lifts in order to allow for new sections of the crane to be inserted at ground level. Overhead cranes are a type of crane without an extended boom arm. The lift hangs between a stationary support structure, and is limited to picking up objects that are within the perimeter of the support structure.

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