Various Types of Crawler-Mounted Cranes
In order to be able to power a huge range of machinery, industrial wheel tractors were modified in the 1920s, by Fordson and McCormick-Deering. Like for example, half-swing cranes and shovels were manufactured by some companies around the power train and engine of the tractor and the wheels became replaced by crawlers.
Crawler tractors came into widespread use during the 1930s. Immediately after, many manufacturers began manufacturing attachments for them, like for instance various lifting machine devices.
Side-mounted booms for example, were used mainly for pipe-laying at first and the machine got the nickname "pipelayer." These machines are currently often utilized for attending to cleaning up railroad derailments. Because of their size, compact design and mobility, as well as exceptional lifting capacity, these equipments are ideal for this application. In addition, swing booms which mounted on top of the engine compartment also became available.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these machinery do not move really fast. Usually, the crane may be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes come outfitted with a lattice boom or a telescopic arm which is easy to extend by utilizing hydraulics. The lattice boom must be assembled by hand by adding many sections.
Tower Cranes
Typically found in big construction projects, tower cranes are required to be built and broken down on location. They have to be transported by truck each and every time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport heavy steel or concrete building components to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each and every new crane part up into place and therefore, are self-erecting.