Various KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of equipment, industrial wheel tractors were adapted during the 1920s, by Fordson and McCormick-Deering. For example, half-swing shovels and cranes were made by several companies around the tractor's power train and engine and the wheels became replaced by crawlers.
In the 1930s, crawler tractors came into widespread use. Soon after, many manufacturers started manufacturing attachments for them, such as various lifting equipment devices.
For example, side-mounted booms were primarily used for pipe-laying where it gained its nickname the "pipelayer." These kinds of equipments are currently normally used for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, as well as excellent lifting capacity, these kinds of machinery are great for this application. In addition, swing booms which mounted on top of the engine compartment also became available.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these equipments do not move very fast. Usually, the crane is powered by one engine and could 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 utilizing hydraulics. The lattice boom should be assembled by hand by adding many sections.
Tower Cranes
Tower cranes are those found in big construction projects. These kinds of cranes are essential to be built and broken down on location. They must be transported by truck every time they are relocated. These tower cranes are very tall. They enable construction crews to move concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each and every new crane part up into place and thus, are self-erecting.