Other KInds of Crawler-Mounted Cranes
In order to be able to power a large variety of machinery, industrial wheel tractors were modified in the 1920s, by McCormick-Deering and Fordson. Like for example, half-swing cranes and shovels were made 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. Soon after, numerous manufacturers started making attachments for them, including a variety of lifting machine devices.
For instance, side-mounted booms were mainly used for pipe-laying where it gained its nickname the "pipelayer." These types of machinery are now normally used for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, as well as excellent lifting capacity, these machines are great for this application. What's more, swing booms that mounted on top of the engine compartment became available too.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these machinery do not move really fast. Normally, the crane can be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes come equipped with a lattice boom or a telescopic arm which is easy to extend by utilizing hydraulics. The lattice boom should be assembled by hand by adding multiple sections.
Tower Cranes
Tower cranes are those found in large construction projects. These kinds of cranes are necessary to be built and broken down on location. They have to be transported by truck each and every time they are relocated. These tower cranes are exceptionally tall. They enable construction crews to transport concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each new crane section up into position and hence, are self-erecting.