Kinds 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 are able to 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 showcases the major types of jib cranes as being either mast mounted, free-standing or wall-mounted.
Free Standing
Free-standing jib cranes can stand alone not requiring support from the building structure. The horizontal boom in this specific situation is connected to a pivoting vertical column that is solidly anchored to the floor of the building. This kind of jib crane is able to rotate a full 360 degrees and requires a foundation made of either concrete or steel.
Mast-Type
The mast-type jib cranes feature a vertical column that is supported by pivot points at the bottom and the top that are connected to the building floor and the overhead steel structure. These jib-cranes provide 360 degrees of rotation with the benefit of not requiring the massive foundation required for free-standing units.
Wall Mounted
The wall-mounted jib cranes offer a horizontal boom which is connected to the wall of a building rather than the typical vertical column. These machine offer up to 200 degrees of rotation and are ideal in areas where the full 360 degree rotation is not required.
Depending on how the boom is supported, there are two model varieties. One type utilizes a tie rod from above the boom that is attached to the wall. The other kind supports the boom from below by using a cantilever brace which is also attached to the wall.