Other KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, such as those built by McCormick-Deering and Fordson were quickly adapted in order to be able to power a large range of machinery. For instance, half-swing shovels and cranes were manufactured by several companies around the tractor's engine and power train 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, like for instance a variety of lifting equipment devices.
For example, side-mounted booms were primarily utilized for pipe-laying where it gained its nickname the "pipelayer." These kinds of equipments are currently normally utilized for attending to cleaning up railroad derailments. Due to their mobility, size and compact design, as well as excellent lifting capacity, these types of equipments are great for this use. In addition, swing booms that mounted on top of the engine compartment became available too.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these machinery do not move very fast. 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 lattice boom or a telescopic arm which can be extended easily using hydraulics. The lattice boom must be manually assembled by adding many sections.
Tower Cranes
Tower cranes are those found in large construction projects. These kinds of cranes are necessary to be built and broken down on location. They must be transported by truck every 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 section up into place and hence, are self-erecting.