Other KInds of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, like those manufactured by McCormick-Deering and Fordson were rapidly modified in order to be able to power a huge range of machinery. Like for instance, half-swing cranes and shovels were made 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. Soon after, numerous manufacturers started making attachments for them, like a range of lifting machine devices.
Side-mounted booms for instance, were used mainly for pipe-laying at first and the machinery got the nickname "pipelayer." These kinds of equipments are currently usually utilized for attending to cleaning up railroad derailments. Due to their mobility, size and compact design, in addition to exceptional lifting capacity, these machinery are ideal for this use. What's more, swing booms which mounted on top of the engine compartment also became available.
Similar to a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these equipments do not move very fast. Normally, the crane could 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 can be extended easily utilizing hydraulics. The lattice boom has to be manually assembled by adding many sections.
Tower Cranes
Tower cranes are those found in big construction projects. These kinds of cranes are essential to be erected and broken down on location. They need to be transported by truck every time they are relocated. These tower cranes are very tall. They allow construction crews to transport heavy steel or concrete building components to the tops of tall buildings. Tower cranes use a hydraulic system to push every new crane part up into place and hence, are self-erecting.