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 transport loads between any areas within the boom's arc of rotation. Light duty models are used within factories and warehouses for loads weighing up to 5 tons. The website BestJibCranes.com features the major jib crane models as being either mast mounted, free-standing or wall-mounted.
Free Standing
The free-standing jib crane models do not require any support from the building structure and are able to stand by themselves. The horizontal boom in this particular situation is attached to a pivoting vertical column which is anchored firmly to the building floor. This type of jib crane requires a foundation made of either concrete or steel and can rotate a full 360 degrees.
Mast-Type
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 provide 360 degrees of rotation with the benefit of not requiring the massive foundation required for free-standing units.
Wall Mounted
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 offer up to 200 degrees of rotation and are great in areas where the full 360 degree rotation is not required.
There are two model varieties, depending on how the boom is supported. One of the types uses a tie rod that is connected from above the wall to the boom. The other type supports the boom from below by utilizing a cantilever brace that is connected to the wall as well.