Various KInds of Crawler-Mounted Cranes
In order to be able to power a large range of machines, industrial wheel tractors were adapted during the 1920s, by McCormick-Deering and Fordson. For instance, half-swing shovels and cranes were made by several companies around the tractor's engine and power train and the wheels became replaced by crawlers.
Crawler tractors came into widespread use in the 1930s. Soon after, many manufacturers began manufacturing attachments for them, like a variety of lifting equipment devices.
For example, side-mounted booms were primarily used for pipe-laying where it gained its nickname the "pipelayer." These types of machinery are frequently utilized today for attending to cleaning up railroad derailments. Due to their mobility, size and compact design, as well as exceptional lifting capacity, these machines are ideal for this use. Moreover, swing booms which mounted on top of the engine compartment became available too.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These equipments can not move fast due to their intense weights. Normally, the crane may be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes come outfitted with a lattice boom or a telescopic arm that could be extended easily utilizing hydraulics. The lattice boom has to be assembled manually by adding multiple sections.
Tower Cranes
Tower cranes are the ones found in large construction projects. These types of cranes are essential to be built and broken down on location. They must be transported by truck every time they are relocated. These tower cranes are very tall. They allow construction crews to move heavy steel or concrete building parts to the tops of tall buildings. Tower cranes use a hydraulic system to push each new crane part up into position and thus, are self-erecting.