Various KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, such as those manufactured by McCormick-Deering and Fordson were rapidly adapted in order to be able to power a huge variety of machines. Like for example, half-swing shovels and cranes were manufactured by several companies around the power train and engine of the tractor and the wheels became replaced by crawlers.
Crawler tractors came into widespread use in the 1930s. Soon after, numerous manufacturers started manufacturing attachments for them, like various lifting equipment devices.
Side-mounted booms for instance, were utilized mainly for pipe-laying at first and the machinery got the nickname "pipelayer." These machinery are presently often used for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, in addition to exceptional lifting capacity, these types of equipments are great for this application. Furthermore, swing booms that 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 equipments 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 come equipped with a telescopic arm or a lattice boom which could be extended easily using hydraulics. The lattice boom should be assembled by hand by adding multiple sections.
Tower Cranes
Usually found in big construction projects, tower cranes are required to be built and broken down on location. They must be transported by truck each time they are relocated. These tower cranes are very tall. They allow construction crews to move heavy steel or concrete building parts to the tops of tall buildings. Tower cranes use a hydraulic system to push each and every new crane part up into position and therefore, are self-erecting.