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Crane TypeFreestanding (Column-Mounted) Jib Crane
A jib crane installed right in the middle of the station, with no dependence on a wall.
The foundation question
In a freestanding jib crane, the entire load transfers to the ground through a single point, and it comes with a large tipping moment. That's why the foundation is as much an engineering item as the jib itself.
Foundation size is calculated from capacity, jib length and the ground's bearing capacity. Using an off-the-shelf figure isn't correct — every application needs its own calculation.
Positioning advantage
Unlike wall-mounted types, the freestanding type can also be installed in the middle of the facility. This lets you place the jib's working circle exactly where the station actually needs it.
It's also possible to fit two jibs facing different directions on a single column, feeding two neighbouring stations with a single investment.
Technical points
| Topic | Determined by |
|---|---|
| Capacity | The heaviest part to be lifted, including the sling |
| Jib length | The station's working radius |
| Rotation angle | Generally 180°–270°; per need |
| Foundation | Capacity × jib length and ground bearing capacity |
| Rotation drive | Manual or motorised |
| Hoist unit | Electric chain hoist or wire rope hoist |
Technical terms
| Term | What it means |
|---|---|
| Tipping moment | The effect of the jib load trying to overturn the column. |
| Anchor bolt | The group of bolts fixing the column to the reinforced-concrete foundation. |
| Working radius | The furthest distance the hook can reach from the column centre. |
| Rotation drive | How the jib is rotated — manually or by motor. |
Frequently asked questions
Can I have the foundation built myself?
Yes, but the foundation design and anchor plan must come from whoever is supplying the crane. An incorrect foundation effectively reduces the jib crane's usable capacity.
Can it be installed on an existing concrete slab?
Yes, if the slab's thickness, reinforcement and bearing capacity are adequate. If not, a separate foundation block is poured.