Wolff Self Erect Cranes
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 models are used inside 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.
The free-standing jib crane models do not need any support from the building structure and are able to stand by themselves. The horizontal boom in this situation is attached to a pivoting vertical column that is anchored solidly to the floor of the building. This type of jib crane is able to rotate a full 360 degrees and requires a foundation made of either concrete or steel.
The vertical column on the mast-type jib cranes are supported by pivot points at the bottom and the top. These pivots are attached 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 jib cranes are connected to the building wall instead of supporting a regular vertical column. These cranes provide a horizontal boom. These machinery are great in areas where the full 360 degree rotation is not needed and provide up to 200 degrees of rotation.
There are two model varieties, depending on how the boom is supported. One of the types utilizes a tie rod which is attached from above the wall to the boom. The other kind supports the boom from below by utilizing a cantilever brace which is also connected to the wall.
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