Various Types of Crawler-Mounted Cranes
In order to be able to power a large variety of machines, industrial wheel tractors were adapted during the 1920s, by Fordson and McCormick-Deering. Like for example, half-swing cranes and shovels were made by some 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 began making attachments for them, including various lifting machine devices.
For instance, side-mounted booms were mainly used for pipe-laying where it gained its nickname the "pipelayer." These kinds of machines are frequently utilized now for attending to cleaning up railroad derailments. Due to their mobility, size and compact design, in addition to excellent lifting capacity, these machinery are ideal for this application. As well, swing booms that mounted on top of the engine compartment became available also.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these machinery do not move very fast. 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 telescopic arm or a lattice boom which is easy to extend by using hydraulics. The lattice boom should be manually assembled by adding multiple sections.
Tower Cranes
Tower cranes are the ones found in big construction projects. These types of cranes are necessary to be erected and broken down on location. They need to be transported by truck each and every time they are relocated. These tower cranes are exceptionally tall. They enable construction crews to move concrete building parts or heavy steel to the tops of tall buildings. Tower cranes use a hydraulic system in order to push each and every new crane section up into position and hence, are self-erecting.