Various KInds of Crawler-Mounted Cranes
In order to be able to power a large range of machinery, industrial wheel tractors were adapted during the 1920s, by McCormick-Deering and Fordson. Like for instance, half-swing cranes and shovels were made by several companies around the tractor's engine and power train and the wheels became replaced by crawlers.
Crawler tractors came into widespread use during the 1930s. Immediately after, many manufacturers started making attachments for them, including 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 machinery are currently often utilized for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, in addition to excellent lifting capacity, these types of machines are ideal for this application. What's more, swing booms which mounted on top of the engine compartment also became available.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these machines do not move really fast. Typically, the crane may 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 can be extended easily using hydraulics. The lattice boom should be assembled by hand by adding many sections.
Tower Cranes
Typically found in large construction projects, tower cranes are required to be built and broken down on location. They have to be transported by truck each time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport heavy steel or concrete building components to the tops of tall buildings. Tower cranes use a hydraulic system to push each new crane section up into position and hence, are self-erecting.