Other KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of machinery, industrial wheel tractors were adapted during the 1920s, by Fordson and McCormick-Deering. Like for example, half-swing shovels and cranes were manufactured 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, numerous manufacturers began making attachments for them, like various lifting equipment devices.
For instance, side-mounted booms were mainly utilized for pipe-laying where it gained its nickname the "pipelayer." These machines are currently often utilized for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, in addition to outstanding lifting capacity, these machines are great for this use. Moreover, swing booms which 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 equipments could not move fast thanks 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 are available with a lattice boom or a telescopic arm which is easy to extend by using hydraulics. The lattice boom must be assembled manually by adding many sections.
Tower cranes are the ones found in large construction projects. These kinds of cranes are essential to be erected and broken down on location. They must be transported by truck each and every time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to be able to push every new crane part up into position and hence, are self-erecting.