In container terminals, safety often depends on equipment that performs a very specific task under demanding conditions. Lashing cages are a good example. They may look simple from the outside, but they are used in one of the most sensitive areas of port operations: giving stevedores safe access to twistlocks and lashing points while working at height.
A stevedore’s lashing cage is a metal structure lifted by a crane or spreader that allows workers to access and handle container twistlocks during loading and unloading operations. TEC Container describes these cages as equipment designed to improve stevedore safety and facilitate access to twistlocks, with different solutions such as safety cages under spreader, gondola safety cages, modular cages and cages under hook.
Because people are lifted inside the equipment, inspection cannot be treated as a formality. A daily check is not only about finding visible damage. It is about confirming that the cage, its access points, attachment system, working area and communication process are ready for the specific operation planned that day.
A lashing cage should never enter service if there is doubt about its condition, its attachment to the lifting equipment, its rated capacity or the safety of the personnel who will use it. This is a Checklist for inspecting lashing cages and prevent accidents or missuse:
1. Start with identification and documentation
Before looking at the structure itself, the inspector should confirm that the correct cage is being used for the planned operation. This sounds obvious, but it is a frequent source of operational risk. A fixed safety cage, a gondola cage and a cage under hook may all be used to improve access at height, but they are not interchangeable in every operating context.
A fixed cage, such as the BA-185, provides a wide and stable platform above the rows of containers, while a gondola cage, such as the BA-323, uses a telescopic system that allows stevedores to position themselves between container columns for more direct access to twistlocks.
The inspector should confirm the equipment ID, safe working load or rated capacity, certification status, inspection records and any recent repairs or modifications. If the plate is missing, unreadable or inconsistent with the operation, the cage should not be used until the issue is resolved.
2. Inspect the structure before anyone enters
The structural inspection should be slow and visual. The aim is to detect anything that could affect the integrity of the cage during lifting or while workers are inside.
Pay close attention to the frame, welds, lifting points, corner fittings, floor, handrails and any areas exposed to repeated impact. Look for deformation, cracks, corrosion, missing components, sharp edges, damaged mesh or loose parts. In a port environment, paint damage should not be ignored automatically; it may be cosmetic, but it may also expose steel to corrosion.
A good rule is simple: if the damage changes the geometry, strength, protection or safe access of the cage, the cage should be removed from service and inspected by a competent person.
This is especially important because personnel platforms must be designed and maintained for lifting people, not simply adapted from general cargo equipment. OSHA’s personnel hoisting rules, for example, require the personnel platform and its attachment system to be designed by a qualified person, and require access gates, guardrails, smooth exposed edges and visible rated capacity information.
3. Check access points, doors and internal safety
Once the structure is visually sound, the next focus should be access. Workers must be able to enter and exit the cage without climbing over unsafe areas, forcing doors or stepping onto unstable surfaces.
Doors should open and close correctly. Locking systems should function without improvisation. Hinges, latches, sliding mechanisms and handles should be checked for damage, stiffness or missing components. If the cage has internal grab rails, these should be secure and free from cracks or sharp edges.
The floor must also be inspected carefully. It should be clean, stable and free from oil, grease, loose objects, broken mesh or anything that could create a slip or trip hazard. Drainage should not be blocked, and any internal equipment or tool bins should be secured.
This part of the inspection is not only about fall prevention. It also affects ergonomics. Lashing work can involve awkward postures, heavy twistlocks and repetitive movements, and the HSA specifically identifies kneeling for long periods inside container safety cages as a possible cause of musculoskeletal risks.
4. Verify attachment and secondary safety systems
The attachment between the cage and the spreader, crane or hook is one of the most critical inspection points. No daily operation should start until the connection method is confirmed, clean, undamaged and compatible with the lifting equipment.
For cages under spreader, the inspector should check the corner castings, twistlock engagement points, locking indicators and any secondary safety system. For cages under hook, the relevant lifting points, shackles, slings or connection hardware must be inspected according to the manufacturer’s instructions and terminal procedures.
The objective is not just to confirm that the cage can be lifted. It is to confirm that it cannot become unintentionally detached during the operation.
TEC Container highlights secondary safety systems as additional protection intended to keep the cage attached to the spreader even in the unlikely event of accidental twistlock opening or failure.
5. Confirm capacity, tools and load distribution
A lashing cage should only carry the people, tools and materials required for the job. It should not be used as a general lifting basket for cargo, spare equipment or loose items that are not part of the operation.
The rated capacity must be visible and respected. The number of workers inside the cage should not exceed the design limit, and tools should be secured to prevent falling objects. Loose lashing gear, twistlocks or hand tools can become serious hazards if they fall from height.
OSHA’s personnel platform rules state that platforms must not be loaded beyond their rated capacity, that they should be used only for employees and the tools and materials necessary for the work, and that tools and materials must be secured and evenly distributed within the platform.
Even where OSHA does not apply, the safety principle is useful: the cage should be loaded in a controlled, predictable and documented way.
6. Confirm communication and emergency readiness
A lashing cage operation depends on communication. The crane operator, supervisor and workers inside the cage need a clear method for giving instructions, stopping the operation and responding to unexpected situations.
Radios, hand signals or other communication systems should be tested before the cage is lifted. Everyone involved should understand who gives the movement order, who can stop the operation and what to do if visibility is lost, wind increases, a worker feels unsafe or the cage becomes obstructed.
Emergency readiness should also be part of the daily check. The team should know how workers would be recovered if the cage cannot be returned normally, how medical assistance would access the area and how the equipment would be isolated if a defect is discovered during use.
A practical daily lashing cage checklist
This checklist can be adapted to the terminal’s own safety management system, local regulations and manufacturer instructions.
Before use, confirm that:
- the correct cage model is selected for the operation;
- identification plate, rated capacity and certification status are legible;
- the latest inspection and maintenance records are valid;
- no unauthorised modifications or unresolved defects are present;
- frame, welds, lifting points and corner fittings show no cracks, deformation or serious corrosion;
- floor, mesh, handrails, toe boards and internal grab rails are secure and undamaged;
- access doors, hinges, locks and latches work correctly;
- there are no loose objects, oil, grease or trip hazards inside the cage;
- attachment points and locking systems are compatible with the spreader, hook or crane;
- secondary safety systems are present, functional and correctly engaged;
- rated capacity and maximum number of workers will not be exceeded;
- tools and materials are secured and evenly distributed;
- PPE requirements are understood and followed;
- weather, lighting, wind and visibility are acceptable;
- exclusion zones and movement routes are clear;
- communication between cage occupants, supervisor and crane operator has been tested;
- emergency and rescue arrangements are understood by the team.
If any item cannot be confirmed, the cage should not be used until the issue has been assessed and corrected.
What to do when a defect is found
Finding a defect is not a delay; it is the inspection doing its job.
If the defect affects structure, access, attachment, rated capacity, locking, secondary safety or worker protection, the cage should be taken out of service immediately. It should be clearly identified, isolated according to the terminal’s lockout or defect-reporting procedure, and assessed by a competent person before returning to operation.
Minor issues should also be recorded. Repeated minor defects can indicate a handling, storage, maintenance or training problem that needs attention before it becomes a serious failure.
