Different KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those manufactured by McCormick-Deering and Fordson were rapidly modified in order to be able to power a large variety of machinery. Like for instance, half-swing cranes and shovels were manufactured 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, numerous manufacturers began making attachments for them, including a variety of lifting equipment devices.
Side-mounted booms for instance, were utilized primarily for pipe-laying at first and the machinery got the nickname "pipelayer." These kinds of equipments are presently normally used for attending to cleaning up railroad derailments. Due to their mobility, size and compact design, in addition to exceptional lifting capacity, these kinds of machinery are great for this use. Furthermore, swing booms which mounted on top of the engine compartment became available also.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These machines could not move fast due to their intense weights. Usually, the crane can be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes come outfitted with a telescopic arm or a lattice boom that could be extended easily using hydraulics. The lattice boom must be manually assembled by adding multiple sections.
Tower Cranes
Typically found in big construction projects, tower cranes are required to be erected 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 heavy steel or concrete building components to the tops of tall buildings. Tower cranes use a hydraulic system in order to push each new crane part up into position and thus, are self-erecting.