Types of Jib Cranes
The trolley hoist on a horizontal load-bearing boom are key features on Jib cranes. The boom is secured to a vertical mast which measures up to 20 feet long. Jib cranes can move loads between any areas within the boom's arc of rotation. Light duty units are used within warehouses and factories for loads weighing up to 5 tons. The web site BestJibCranes.com features the major types of jib cranes as being either wall-mounted, mast mounted or free-standing.
Free Standing
Free-standing jib cranes are able to stand alone not needing support from the building structure. The horizontal boom in this case is attached to a pivoting vertical column which is firmly anchored to the floor of the building. This type of jib crane could rotate a full 360 degrees and needs a foundation made of either steel or concrete.
Mast-Type
The mast-type jib cranes feature a vertical column that is supported by pivot points at the top and the bottom that are attached to the building floor and the overhead steel structure. These jib-cranes provide 360 degrees of rotation with the benefit of not needing the massive foundation needed for free-standing units.
Wall Mounted
Wall mounted jib cranes are attached to the building wall rather than supporting a typical vertical column. These cranes provide a horizontal boom. These machinery are great in areas where the full 360 degree rotation is not needed and offer up to 200 degrees of rotation.
There are two model varieties, depending on how the boom is supported. One of the kinds uses a tie rod that is attached from above the wall to the boom. The other variety supports the boom from below by utilizing a cantilever brace which is connected to the wall as well.