Various KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of machines, industrial wheel tractors were modified during the 1920s, by Fordson and McCormick-Deering. Like for example, half-swing cranes and shovels were manufactured by some companies around the tractor's power train and engine and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Soon after, numerous manufacturers began manufacturing attachments for them, like a range of lifting equipment devices.
Side-mounted booms for instance, were used mainly for pipe-laying at first and the machinery got the nickname "pipelayer." These equipments are often utilized now for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, in addition to excellent lifting capacity, these equipments are ideal for this use. Additionally, swing booms which mounted on top of the engine compartment also became available.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These machinery could not move fast thanks to their intense weights. Usually, the crane may 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
Tower cranes are those found in big construction projects. These types of cranes are essential to be erected and broken down on location. They must be transported by truck every time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to move heavy steel or concrete building components to the tops of tall buildings. Tower cranes use a hydraulic system to push each new crane part up into position and hence, are self-erecting.