Various KInds of Crawler-Mounted Cranes
In order to be able to power a large variety of machines, industrial wheel tractors were adapted during the 1920s, by McCormick-Deering and Fordson. For instance, half-swing cranes and shovels were manufactured by some companies around the power train and engine of the tractor and the wheels became replaced by crawlers.
Crawler tractors came into widespread use throughout the 1930s. Immediately after, numerous manufacturers started manufacturing attachments for them, like for example a variety of lifting machine devices.
Side-mounted booms for example, were utilized mainly for pipe-laying at first and the equipment got the nickname "pipelayer." These machines are often used today for attending to cleaning up railroad derailments. Because of their compact design, mobility and size, as well as outstanding lifting capacity, these equipments are great for this application. Furthermore, swing booms which mounted on top of the engine compartment also became available.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These equipments could not move fast due to their intense weights. Usually, the crane is powered by one engine and may be controlled by 2 or more cable operated drums. The crawler cranes come outfitted with a telescopic arm or a lattice boom which can be extended easily utilizing hydraulics. The lattice boom must be manually assembled by adding multiple sections.
Tower Cranes
Tower cranes are the ones found in big construction projects. These types of cranes are essential 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 components or heavy steel to the tops of tall buildings. Tower cranes use a hydraulic system to be able to push each new crane section up into place and therefore, are self-erecting.