Working of Construction Cranes
Types of Cranes
Since cranes used on construction sites are usually temporary structures, sometimes they are mounted to vehicles so that they can be easily moved. Truck-mounted cranes are usually able to travel on highways. Therefore, additional equipment is not necessary to transport the crane to the job site. When the crane is then erected at the construction site, outriggers are extended horizontally from the base of the truck and then vertically to stabilize the crane..
- Telescopic boom type
- Hydraulic boom
- Lattice work boom
- Articulated boom
- Trolley boom.
A rough terrain crane is a special type of truck-mounted crane. It is mounted to an undercarriage that has rubber tires specifically used for off-road applications. Outriggers are also used for stability with this type of crane.
A crawler crane is a mobile crane that does not require outriggers for stability. A crawler crane is mounted to a chassis with a set of tracks instead of tires and has a lifting capacity from 40 tons to 3500 tons. Although crawler cranes are mobile around a site, they usually need to be disassembled and loaded on to transport trucks for movement between sites.
Rail mounted gantry (RMG) cranes
Electric Overhead Traveling Crane:
Level Luffing Cranes:
Often this means that the job in question must be accomplished in remote or inaccessible areas, such as the tops of tall buildings or the top of a hill or mountain, far from the nearest road.