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A slewing jib fixed to a load-bearing wall or column, so it occupies no floor space. It serves a half circle rather than a full one. The decisive question is the capacity of the connection: wall or column have to take the full tipping moment, which with aerated concrete, sandwich facades and retrofitted anchors rarely works without structural evidence.
A wall-mounted jib crane is a jib crane without a pillar. A bracket with two bearings, one above the other, is fixed to a load-bearing wall or column; the jib with trolley and hoist pivots in it. The working area is roughly a half circle in front of the wall.
The floor stays completely clear. That makes the design attractive at machines, along walls and wherever a pillar would be in the way of a forklift or the operator.
At the bracket the tipping moment of load and outreach becomes a force couple: the upper bearing pulls away from the wall, the lower one presses against it. The smaller the distance between the two bearings, the greater these horizontal forces. In addition there is the vertical load from crane, hoist and payload.
When the jib slews to the side, the forces no longer act at right angles to the wall. A column is then additionally loaded in bending about its second axis and in torsion.
How the bracket is fixed depends on the structural member.
The decisive question is not whether the crane carries the load but whether wall or column can take the forces. Building columns are designed for the loads of the building; an additional horizontal load at head height was normally not part of that design.
Verification by a structural engineer therefore comes before any installation. Masonry, aerated concrete and sandwich facades are normally ruled out as a fixing base. Where verification fails, the pillar jib crane with its own foundation remains.
It fits when a single workstation lies close to a load-bearing wall or column and the half circle covers the working area. If several stations lie side by side along the same wall, a rail along the wall is often a better solution than several cranes.
What Entracon offers here is on the matching page.
See what we offer| Fixing base | Usual fixing | To be clarified |
|---|---|---|
| Reinforced concrete wall | Anchors or through bolts with backing plate | Wall thickness, reinforcement, concrete grade |
| Steel column | Bolted or clamped connection | Bending and torsion of the column, connections |
| Reinforced concrete column | Clamping bracket around the column | Cross-section, reinforcement, additional load on the column |
| Masonry, aerated concrete, sandwich wall | Normally unsuitable | Alternative: pillar jib crane |
No. The column has to be able to take the additional forces from the crane, and this must be verified by calculation. Without verification by a structural engineer, no wall-mounted jib crane should be installed.
About a half circle. The exact angle depends on the bracket and the position relative to the wall; on a free-standing column it can be larger than on a continuous wall.
The floor stays clear and no foundation is needed. In return the working area is smaller, and the design presupposes a load-bearing member in the right place.
One short conversation usually settles more than three quotations. Call or write — you will reach an engineer directly.
Start typing – for example “balancer”, “SAP” or “pipe stress”.
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