Different Types of Crawler-Mounted Cranes
In order to be able to power a huge range of machinery, industrial wheel tractors were adapted in the 1920s, by McCormick-Deering and Fordson. Like for example, half-swing cranes and shovels were manufactured by several companies around the engine and power train of the tractor and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Soon after, numerous manufacturers started manufacturing attachments for them, such as various lifting machine devices.
For example, side-mounted booms were mainly used for pipe-laying where it gained its nickname the "pipelayer." These equipments are often 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 kinds of machines are ideal for this use. What's more, swing booms which 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 very fast. Normally, the crane may 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 which is easy to extend by utilizing hydraulics. The lattice boom needs to be assembled manually by adding multiple sections.
Tower Cranes
Tower cranes are those found in large construction projects. These types of cranes are necessary to be erected and broken down on location. They must be transported by truck each time they are relocated. These tower cranes are very tall. They enable construction crews to move 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.