Jib crane with rope unit: maintenance and inspection
On a jib crane the load travels away from the pivot – and the moment travels with it. What looks like a small movement at the jib is the decisive figure down at the foundation. Inspecting a jib crane therefore starts not at the rope but at the floor.
- Rule
- DGUV rule 52 (cranes)
- Interval
- at least annually
- Makes
- any make
Five metres of reach means five metres of leverage on the foundation.
Which rule applies – and at what interval
A jib crane is a crane and therefore falls under DGUV rule 52 – not rule 54, which would apply to the rope unit on its own. That changes the scope and brings a crane logbook with it, in which every inspection is entered. The attached rope unit is assessed additionally as hoisting and traction equipment. As always the interval follows from your risk assessment under section 3 of the German Industrial Safety Regulation; one year is the floor, not automatically the right answer.
- Rule
- DGUV rule 52 (cranes)
- Minimum interval
- at least annually
- Inspector
- competent person
What we look at on this unit
| Component | Finding | Discard limit |
|---|---|---|
| Slew ring / bearing | Play, roughness when slewing, lubrication, seals | noticeable tilting play at the jib tip |
| Jib | Deformation, welds, attachment points, corrosion | any crack, any permanent deformation |
| Slew limitation | Stops, locks, end position | stop missing or not engaging |
| Column & foundation | Anchor bolts, pull-out, cracks in the concrete, settlement | any loose anchor, any crack |
| Wire rope | Broken wires, strand failure, birdcaging, corrosion | discard criteria to ISO 4309 |
| Load hook | Throat opening, safety latch, deformation | 10 % opening against new dimension |
| Pneumatics / drive | Leakage, valves, load holding on pressure loss | load must not creep down |
The limits come from the applicable rules. Where manufacturer data exists for the specific unit, it prevails.
What actually gets done
The foundation first
On a jib crane the foundation is not a side issue but the most highly stressed component of the installation. Anchor bolts are checked for pull-out and tightening torque, the concrete for cracks and spalling around the anchor plate. A crack running away from an anchor is a reason to stop the unit, not an item to watch.
Tilting play on the long lever
Play in the slew ring is not measured at the ring but at the jib tip – that is where the lever acts and where the operator notices it first. We load the jib and measure the deflection instead of rocking the bearing.
Slew across the whole range
Roughness, binding and knocking often occur in one sector only – usually the one worked in daily. We slew slowly across the entire range, with and without load, and check the end stops.
Rope and hook
Assessment of the wire rope to ISO 4309 over the full running length, the load hook checked for throat opening with a gauge rather than by eye, the safety latch for function.
When the task has changed
Restrict the slewing range
More common than extension is limitation: a new stop keeps the jib out of a traffic route or away from a machine. A small change that removes a whole hazard.
A different rope unit
Jib and column are long-lived; the rope unit is the part that ages. It can be replaced without touching the installation – as long as capacity and attachment match.
Extend the reach
Technically possible, but the point where something is most quickly overlooked: the moment grows with length, and the limit almost always sits in the foundation. We recalculate before anything is built.
What we offer for it
Lifting Equipment Maintenance
Planned maintenance of chain hoists, wire rope hoists, balancers and manipulators – any make.
Lifting Equipment Inspection
Recurring inspection under German BetrSichV and DGUV rules – chain hoists, rope hoists, balancers, manipulators and jib cranes.
Repair & Overhaul
Repair of lifting equipment and manipulators of any make – from a brake change to a full overhaul.
Upgrades & Modification
Adapting existing lifting equipment to a new task – gripper, control, reach, capacity.
Questions on maintenance and inspection
Does a jib crane get the same inspection as a chain hoist?
No. A jib crane falls under DGUV rule 52 – cranes – while a chain hoist or balancer falls under rule 54. The scope differs, and a crane logbook is kept for the crane. Where you have both, we inspect both in one visit under the rule that applies to each.
Does the foundation really have to be checked every time?
Yes. It is the component that takes the entire moment load, and the most common serious finding on jib cranes. Loose anchor bolts are not rare – they work loose over years of load changes without anyone noticing.
Can we increase the capacity?
Rarely without work on the foundation. The jib usually looks solid enough, but the limit is at the bottom. We recalculate the desired condition and say honestly whether it carries – even when the answer is no.
Let’s talk about your equipment.
Tell us which units you have – including ones from different manufacturers. We will come back with a proposal for scope and interval.