Different KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those built by Fordson and McCormick-Deering were quickly adapted in order to be able to power a huge variety of equipment. Like 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.
Crawler tractors came into widespread use during the 1930s. Soon after, many manufacturers began manufacturing attachments for them, like a range of lifting machine devices.
Side-mounted booms for instance, were utilized mainly for pipe-laying at first and the equipment got the nickname "pipelayer." These machines are now normally utilized for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, as well as excellent lifting capacity, these types of machinery are ideal for this use. Moreover, swing booms that mounted on top of the engine compartment became available too.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these machinery do not move very fast. Typically, the crane is powered by one engine and could be controlled by 2 or more cable operated drums. The crawler cranes are available with a lattice boom or a telescopic arm which is easy to extend by utilizing hydraulics. The lattice boom needs to be assembled manually 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 should be transported by truck each time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport concrete building components or heavy steel to the tops of tall buildings. Tower cranes use a hydraulic system to push every new crane part up into position and hence, are self-erecting.