Various Types of Crawler-Mounted Cranes
In order to be able to power a huge range of equipment, industrial wheel tractors were adapted during the 1920s, by McCormick-Deering and Fordson. Like for instance, half-swing cranes and shovels were made by some companies around the power train and engine of the tractor and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Soon after, numerous manufacturers began making attachments for them, such as various lifting equipment devices.
Side-mounted booms for example, were utilized mainly for pipe-laying at first and the machine got the nickname "pipelayer." These kinds of machinery are often used these days for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, along with excellent lifting capacity, these kinds of machinery are great for this application. Furthermore, swing booms which mounted on top of the engine compartment also became available.
Crawler cranes are like the crawler tractor in that it travels along crawler tracks. These equipments can not move fast thanks to their intense weights. Usually, the crane is powered by one engine and could be controlled by 2 or more cable operated drums. The crawler cranes are available with a lattice boom or a telescopic arm which could be extended easily 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 time they are relocated. These tower cranes are exceptionally tall. They enable construction crews to transport concrete building parts or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each and every new crane section up into place and thus, are self-erecting.