Various KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those made by Fordson and McCormick-Deering were quickly modified in order to be able to power a large variety of machines. Like 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.
In the 1930s, crawler tractors came into widespread use. Soon after, many manufacturers started making attachments for them, including various lifting machine devices.
For example, side-mounted booms were primarily utilized for pipe-laying where it gained its nickname the "pipelayer." These kinds of equipments are frequently utilized today for attending to cleaning up railroad derailments. Because of their size, compact design and mobility, along with excellent lifting capacity, these types of machines are ideal for this application. As well, swing booms that 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 equipments could not move fast due to their intense weights. Usually, 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 can be extended easily utilizing hydraulics. The lattice boom should be assembled by hand by adding multiple sections.
Tower Cranes
Normally 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 exceptionally 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 push each new crane part up into place and hence, are self-erecting.