Various Types of Crawler-Mounted Cranes
Industrial wheel tractors in the 1920s, including those made by McCormick-Deering and Fordson were quickly adapted in order to be able to power a huge range of machinery. Like for example, half-swing shovels and cranes were manufactured by several 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. Immediately after, many manufacturers started making attachments for them, including a range of lifting machine devices.
For example, side-mounted booms were mainly utilized for pipe-laying where it gained its nickname the "pipelayer." These equipments are now usually utilized for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, along with excellent lifting capacity, these kinds of machinery are great for this use. Additionally, swing booms that mounted on top of the engine compartment also became available.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these equipments do not move really fast. Usually, the crane is powered by one engine and could be controlled by 2 or more cable operated drums. The crawler cranes come outfitted with a telescopic arm or a lattice boom that can 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 kinds of cranes are necessary to be erected and broken down on location. They should be transported by truck each time they are relocated. These tower cranes are very tall. They allow construction crews to transport heavy steel or concrete building parts to the tops of tall buildings. Tower cranes use a hydraulic system in order to push every new crane part up into position and therefore, are self-erecting.