Other KInds of Crawler-Mounted Cranes
In order to be able to power a huge variety of equipment, industrial wheel tractors were adapted in the 1920s, by Fordson and McCormick-Deering. Like for instance, 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. Immediately after, numerous manufacturers began making attachments for them, such as a variety of lifting equipment devices.
Side-mounted booms for instance, were used mainly for pipe-laying at first and the equipment got the nickname "pipelayer." These types of machines are often utilized these days for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, in addition to exceptional lifting capacity, these kinds of machines are great for this application. What's more, swing booms that mounted on top of the engine compartment became available also.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these equipments do not move really fast. Normally, the crane could be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes are available with a telescopic arm or a lattice boom that can be extended easily using hydraulics. The lattice boom must be assembled by hand by adding many sections.
Tower Cranes
Tower cranes are those 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 time they are relocated. These tower cranes are exceptionally tall. They enable construction crews to move heavy steel or concrete building parts to the tops of tall buildings. Tower cranes utilize a hydraulic system to be able to push each and every new crane part up into position and hence, are self-erecting.