The temporary state can govern the lift

1. Define the states before checking the crane

A heavy lift is a sequence of structural configurations. The object may begin on its original supports, transfer onto temporary supports, become partly disconnected, transfer load into rigging and finally land on a transport support arrangement. Each state has a different load path. The original operating design does not establish that these temporary configurations are adequate.

Create a state register with a drawing for each meaningful change. Identify what carries the load, what restrains movement, what has been cut, which connections remain and what observation confirms the transition is complete. Include pauses in the work, because a configuration intended to last briefly may need to remain stable when weather or access interrupts the sequence.

2. Trace the complete load path

Follow load from the object through its local members, lifting points, attachments, rigging, crane and supporting vessel or ground. Review the landing path with the same discipline. A lifting point check alone says little about the surrounding structure if corrosion, modifications or removed bracing have changed its capacity.

For inherited equipment, establish the weight and centre-of-gravity basis and the uncertainty around them. Identify trapped liquids, residual contents, undocumented additions and temporary equipment. Decide which uncertainties can be resolved by inspection or measurement and which need to remain as design cases. The objective is a justified operating envelope, not a single optimistic weight.

UK HSE lifting guidance emphasises competent planning proportionate to complexity, with actions and responsibilities defined for each step. Its temporary works guidance includes permanent works used for temporary purposes and describes coordination and design checking. These are useful technical references; their legal language belongs to the UK context. HSE lifting operations ↗ (opens in a new tab), HSE temporary works ↗ (opens in a new tab).

3. Review the transition, not only the endpoints

The installed and suspended states can both be acceptable while the transition between them is poorly understood. During cutting, an attachment may still carry load. During initial hoisting, restraint can remain on one side. During landing, an uneven contact sequence can concentrate load before all supports engage. The engineering review should ask how those conditions are detected and managed.

Define hold points around irreversible steps. The required evidence could include an inspection release, confirmation of isolation, verification of rigging configuration or measured response within an approved envelope. Do not turn this reading note into an execution procedure: acceptance limits and recovery actions must come from the project-specific engineered method.

4. Make the interfaces visible

Allocate responsibility for the object, temporary steelwork, rigging, crane, vessel response and landing arrangement. Agree what information crosses each boundary and who accepts it. A contractor drawing can be internally correct while using a load, geometry or sequence that differs from another contractor's basis.

Safe Work Australia's crane guide provides Australian general guidance on planning, risk management and coordination among those involved. The applicable offshore or onshore statutory regime still needs to be established for the actual operation. General guide to cranes ↗ (opens in a new tab).

The review is ready when the team can explain what supports and restrains the object at every stage, what could invalidate that explanation and what prevents progression when the evidence is incomplete.