Different KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of machines, industrial wheel tractors were adapted during the 1920s, by McCormick-Deering and Fordson. Like for example, half-swing shovels and cranes were made by some companies around the tractor's engine and power train and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Soon after, many manufacturers started manufacturing attachments for them, including a range of lifting equipment devices.
Side-mounted booms for instance, were used mainly for pipe-laying at first and the machine got the nickname "pipelayer." These equipments are currently usually utilized for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, as well as exceptional lifting capacity, these kinds of machines are ideal for this use. Furthermore, 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 can not move fast due to their intense weights. Typically, 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 that could be extended easily using hydraulics. The lattice boom must be manually assembled by adding multiple sections.
Tower Cranes
Usually found in large construction projects, tower cranes are required 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 utilize a hydraulic system in order to push every new crane section up into position and thus, are self-erecting.