Different Types of Crawler-Mounted Cranes
In order to be able to power a large variety of machinery, industrial wheel tractors were adapted in the 1920s, by McCormick-Deering and Fordson. Like for instance, half-swing shovels and cranes were manufactured by some 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 started manufacturing attachments for them, such as a range of lifting machine devices.
Side-mounted booms for instance, were utilized primarily for pipe-laying at first and the equipment got the nickname "pipelayer." These machines are usually utilized now for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, in addition to excellent lifting capacity, these types of machinery are great for this use. What's more, swing booms that mounted on top of the engine compartment became available also.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these machinery do not move very fast. Usually, the crane can be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes are available with a lattice boom or a telescopic arm that could be extended easily utilizing hydraulics. The lattice boom should be manually assembled by adding many sections.
Tower Cranes
Normally found in large construction projects, tower cranes are required to be erected and broken down on location. They must be transported by truck every time they are relocated. These tower cranes are very tall. They enable construction crews to transport concrete building parts or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push every new crane part up into position and thus, are self-erecting.