Various KInds of Crawler-Mounted Cranes
In order to be able to power a large range of machinery, industrial wheel tractors were modified during the 1920s, by McCormick-Deering and Fordson. Like for instance, half-swing shovels and cranes were made by several companies around the tractor's engine and power train and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Immediately after, numerous manufacturers began manufacturing attachments for them, including a variety of lifting equipment devices.
For example, side-mounted booms were primarily utilized for pipe-laying where it gained its nickname the "pipelayer." These types of equipments are presently often used for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, as well as outstanding lifting capacity, these types of machines are great for this application. Moreover, swing booms which mounted on top of the engine compartment also became available.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These machinery can not move fast due to their intense weights. Normally, the crane is powered by one engine and can be controlled by 2 or more cable operated drums. The crawler cranes come equipped with a lattice boom or a telescopic arm which could be extended easily using hydraulics. The lattice boom has to be manually assembled by adding multiple sections.
Tower Cranes
Tower cranes are the ones found in big construction projects. These kinds of cranes are necessary to be erected and broken down on location. They should 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 use a hydraulic system to push each new crane section up into place and thus, are self-erecting.