Wolff Self Erect Cranes
Jib Crane Models
Jib cranes are made up of a trolley hoist on a horizontal load-bearing boom. This boom is attached to a pivoting vertical member and up to 20 feet long. Jib cranes can transport loads between any areas within the boom's arc of rotation. Light duty models are used in warehouses and factories for loads weighing as much as 5 tons. The web site BestJibCranes.com showcases the major kinds of jib cranes as being either mast mounted, free-standing or wall-mounted.
Free-standing jib cranes can stand alone not requiring support from the building structure. The horizontal boom in this situation is attached to a pivoting vertical column that is solidly anchored to the building floor. This kind of jib crane needs a foundation made of either concrete or steel and can rotate a full 360 degrees.
The vertical column on the mast-type jib cranes are supported by pivot points at the top and the bottom. These pivots are connected to the building floor and the overhead steel structure. These jib-cranes offer 360 degrees of rotation with the benefit of not requiring the massive foundation required for free-standing units.
The wall-mounted jib cranes provide a horizontal boom that is attached to the building wall as opposed to the regular vertical column. These machinery are ideal in places where the full 360 degree rotation is not required and provide up to 200 degrees of rotation.
Depending on how the boom is supported, there are two model varieties. One type uses a tie rod from above the boom that is attached to the wall. The other variety supports the boom from below by using a cantilever brace that is also attached to the wall.
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