Different Types of Crawler-Mounted Cranes
In order to be able to power a large variety of machinery, industrial wheel tractors were modified 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.
In the 1930s, crawler tractors came into widespread use. Immediately after, many manufacturers began manufacturing attachments for them, like various lifting machine devices.
For instance, side-mounted booms were mainly used for pipe-laying where it gained its nickname the "pipelayer." These machines are often utilized nowadays for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, in addition to excellent lifting capacity, these equipments are great for this application. What's more, swing booms which mounted on top of the engine compartment became available too.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these equipments do not move very fast. Typically, the crane is powered by one engine and could be controlled by 2 or more cable operated drums. The crawler cranes are available with a telescopic arm or a lattice boom that can be extended easily using hydraulics. The lattice boom should be manually assembled by adding many sections.
Tower Cranes
Tower cranes are the ones found in big construction projects. These types of cranes are necessary to be built 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 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 therefore, are self-erecting.