Different KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of machines, industrial wheel tractors were modified in the 1920s, by McCormick-Deering and Fordson. Like for instance, half-swing cranes and shovels were manufactured by several companies around the tractor's power train and engine and the wheels became replaced by crawlers.
Crawler tractors came into widespread use during the 1930s. Soon after, many manufacturers started making attachments for them, like various lifting equipment devices.
Side-mounted booms for instance, were utilized primarily for pipe-laying at first and the equipment got the nickname "pipelayer." These types of machinery are frequently used these days for attending to cleaning up railroad derailments. Because of their compact design, mobility and size, as well as excellent lifting capacity, these equipments are great for this use. What's more, 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 machines do not move really fast. Normally, 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 lattice boom or a telescopic arm which can 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 built and broken down on location. They should be transported by truck each and every time they are relocated. These tower cranes are very tall. They enable construction crews to transport heavy steel or concrete building components to the tops of tall buildings. Tower cranes utilize a hydraulic system to be able to push each new crane section up into place and hence, are self-erecting.