Various KInds of Crawler-Mounted Cranes
Industrial wheel tractors in the 1920s, including those built by McCormick-Deering and Fordson were quickly modified in order to be able to power a huge variety of machinery. For example, 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.
Crawler tractors came into widespread use throughout the 1930s. Immediately after, numerous manufacturers began making attachments for them, like various lifting equipment devices.
Side-mounted booms for instance, were utilized mainly for pipe-laying at first and the equipment got the nickname "pipelayer." These machinery are frequently utilized now for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, along with outstanding lifting capacity, these equipments are ideal for this use. Moreover, swing booms which mounted on top of the engine compartment became available also.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these equipments do not move very fast. Typically, the crane is powered by one engine and could be controlled by 2 or more cable operated drums. The crawler cranes come outfitted with a lattice boom or a telescopic arm that can be extended easily utilizing hydraulics. The lattice boom must be manually assembled by adding many sections.
Tower Cranes
Tower cranes are those found in large construction projects. These types of cranes are essential to be built 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 concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push every new crane part up into place and thus, are self-erecting.