Various KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, such as those built by Fordson and McCormick-Deering were rapidly adapted in order to be able to power a huge range of machines. For instance, half-swing cranes and shovels were manufactured by some companies around the engine and power train of the tractor and the wheels became replaced by crawlers.
In the 1930s, crawler tractors came into widespread use. Immediately after, many manufacturers started making attachments for them, including various lifting machine devices.
For example, side-mounted booms were primarily used for pipe-laying where it gained its nickname the "pipelayer." These equipments are frequently utilized these days for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, along with excellent lifting capacity, these types of machinery are ideal for this use. Additionally, swing booms that mounted on top of the engine compartment also became available.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these machinery do not move really fast. Typically, the crane is powered by one engine and may be controlled by 2 or more cable operated drums. The crawler cranes come equipped with a telescopic arm or a lattice boom which can be extended easily using hydraulics. The lattice boom must be manually assembled by adding multiple sections.
Tower Cranes
Typically 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 very tall. They enable construction crews to move heavy steel or concrete building components to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each new crane part up into position and hence, are self-erecting.