Different KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, including those built by McCormick-Deering and Fordson were quickly modified in order to be able to power a huge range of equipment. For instance, half-swing shovels and cranes were made by some companies around the engine and power train of the tractor and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Immediately after, many manufacturers began manufacturing attachments for them, like various lifting machine devices.
Side-mounted booms for example, were utilized primarily for pipe-laying at first and the machine got the nickname "pipelayer." These kinds of machinery are frequently utilized today for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, along with outstanding lifting capacity, these types of machines are ideal for this use. In addition, swing booms that mounted on top of the engine compartment became available also.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These machinery could not move fast due to their intense weights. Normally, the crane is powered by one engine and may be controlled by 2 or more cable operated drums. The crawler cranes come outfitted with a lattice boom or a telescopic arm which is easy to extend by using hydraulics. The lattice boom should be manually assembled by adding multiple sections.
Tower Cranes
Typically found in big construction projects, tower cranes are required to be erected and broken down on location. They should be transported by truck every time they are relocated. These tower cranes are very tall. They enable construction crews to transport heavy steel or concrete building parts to the tops of tall buildings. Tower cranes utilize a hydraulic system to be able to push every new crane section up into place and thus, are self-erecting.