Various KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, including those made by Fordson and McCormick-Deering were rapidly modified in order to be able to power a large variety of machinery. For example, half-swing shovels and cranes were manufactured by several companies around the power train and engine of the tractor and the wheels became replaced by crawlers.
Throughout the 1930s, crawler tractors came into widespread use. Soon after, many manufacturers began manufacturing attachments for them, such as a range of lifting equipment devices.
For instance, side-mounted booms were primarily utilized for pipe-laying where it gained its nickname the "pipelayer." These types of machinery are often used these days for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, along with exceptional lifting capacity, these kinds of machines are ideal for this application. As well, swing booms which mounted on top of the engine compartment became available too.
Crawler cranes are like the crawler tractor in that it travels along crawler tracks. These machinery could not move fast thanks to their intense weights. Normally, 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 could 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 necessary to be erected and broken down on location. They should be transported by truck every time they are relocated. These tower cranes are very tall. They enable construction crews to transport heavy steel or concrete building components to the tops of tall buildings. Tower cranes utilize a hydraulic system to be able to push each and every new crane section up into place and therefore, are self-erecting.