Different KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those manufactured by McCormick-Deering and Fordson were quickly modified in order to be able to power a large range of machinery. Like for instance, half-swing shovels and cranes were made by some companies around the engine and power train of the tractor and the wheels became replaced by crawlers.
Crawler tractors came into widespread use during the 1930s. Immediately after, numerous manufacturers began making attachments for them, like for example a variety of lifting equipment devices.
Side-mounted booms for instance, were utilized primarily for pipe-laying at first and the equipment got the nickname "pipelayer." These machinery are usually used these days for attending to cleaning up railroad derailments. Because of their compact design, mobility and size, along with outstanding lifting capacity, these machines are great for this use. Additionally, swing booms that 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 machinery could not move fast due to their intense weights. Typically, 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 telescopic arm or a lattice boom which can be extended easily using hydraulics. The lattice boom must be manually assembled by adding many sections.
Tower Cranes
Normally found in big construction projects, tower cranes are required to be built and broken down on location. They should be transported by truck each time they are relocated. These tower cranes are exceptionally tall. They allow construction crews to move heavy steel or concrete building parts to the tops of tall buildings. Tower cranes utilize a hydraulic system to push every new crane part up into place and thus, are self-erecting.