Other Types of Crawler-Mounted Cranes
In order to be able to power a large range of machinery, industrial wheel tractors were modified during the 1920s, by Fordson and McCormick-Deering. Like for example, half-swing cranes and shovels were made by several companies around the tractor's power train and engine and the wheels became replaced by crawlers.
In the 1930s, crawler tractors came into widespread use. Immediately after, many manufacturers began making attachments for them, such as various lifting machine devices.
Side-mounted booms for instance, were used primarily for pipe-laying at first and the equipment got the nickname "pipelayer." These machines are now often utilized for attending to cleaning up railroad derailments. Because of their mobility, size and compact design, along with exceptional lifting capacity, these kinds of machinery are great for this use. Furthermore, swing booms that mounted on top of the engine compartment became available too.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Due to their intense weight, these equipments 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 telescopic arm or a lattice boom that can be extended easily using hydraulics. The lattice boom needs to be assembled by hand by adding multiple sections.
Tower Cranes
Tower cranes are those found in large construction projects. These kinds of cranes are essential to be erected and broken down on location. They must be transported by truck each and every time they are relocated. These tower cranes are very tall. They allow construction crews to move concrete building parts or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each and every new crane section up into place and therefore, are self-erecting.