Various Types of Crawler-Mounted Cranes
In order to be able to power a large variety of equipment, industrial wheel tractors were adapted during the 1920s, by Fordson and McCormick-Deering. Like for instance, half-swing cranes and shovels were manufactured by some companies around the tractor's engine and power train and the wheels became replaced by crawlers.
In the 1930s, crawler tractors came into widespread use. Soon after, numerous manufacturers started making attachments for them, such as a range of lifting equipment devices.
For example, side-mounted booms were mainly utilized for pipe-laying where it gained its nickname the "pipelayer." These machines are often used now for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, along with outstanding lifting capacity, these equipments are great for this application. In addition, swing booms that mounted on top of the engine compartment became available also.
Crawler cranes are like the crawler tractor in that it travels along crawler tracks. These machines could not move fast thanks to their intense weights. Normally, the crane can be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes are available with a lattice boom or a telescopic arm which can be extended easily utilizing hydraulics. The lattice boom needs to be manually assembled by adding multiple sections.
Tower Cranes
Normally found in large construction projects, tower cranes are required to be built and broken down on location. They must be transported by truck every time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport concrete building parts or heavy steel to the tops of tall buildings. Tower cranes use a hydraulic system to push each and every new crane section up into position and hence, are self-erecting.