Various Types of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those manufactured by Fordson and McCormick-Deering were rapidly modified in order to be able to power a large range of machinery. For example, half-swing shovels and cranes were made by several companies around the tractor's engine and power train and the wheels became replaced by crawlers.
Throughout the 1930s, crawler tractors came into widespread use. Immediately after, numerous manufacturers started manufacturing attachments for them, such as various lifting machine devices.
Side-mounted booms for instance, were utilized primarily for pipe-laying at first and the equipment got the nickname "pipelayer." These machinery are frequently utilized now for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, in addition to excellent 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.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these machines do not move really fast. Usually, the crane is powered by one engine and can be controlled by 2 or more cable operated drums. The crawler cranes are available with a telescopic arm or a lattice boom that could be extended easily utilizing hydraulics. The lattice boom needs to be manually assembled by adding multiple sections.
Tower Cranes
Usually found in large construction projects, tower cranes are required to be erected and broken down on location. They must be transported by truck each and every time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to transport concrete building parts or heavy steel to the tops of tall buildings. Tower cranes use a hydraulic system to push each and every new crane part up into position and thus, are self-erecting.