Various Types of Crawler-Mounted Cranes
Industrial wheel tractors in the 1920s, including those manufactured by Fordson and McCormick-Deering were rapidly modified in order to be able to power a huge variety of machinery. 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.
In the 1930s, crawler tractors came into widespread use. Soon after, numerous manufacturers started manufacturing attachments for them, including various lifting machine devices.
Side-mounted booms for instance, were used primarily for pipe-laying at first and the machinery got the nickname "pipelayer." These machines are currently normally utilized for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, along with outstanding lifting capacity, these types of equipments are ideal for this application. Additionally, swing booms that mounted on top of the engine compartment became available too.
LIke a crawler tractor, crawler cranes travel on crawler tracks. Because of their intense weight, these equipments do not move very fast. Usually, the crane is powered by one engine and can be controlled by 2 or more cable operated drums. The crawler cranes come outfitted with a lattice boom or a telescopic arm that can be extended easily utilizing hydraulics. The lattice boom should be manually assembled by adding many sections.
Tower Cranes
Tower cranes are the ones found in big construction projects. These types 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 enable construction crews to move concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system to push each and every new crane section up into position and thus, are self-erecting.