In automated warehouses, pallet dimensions, load distribution, and cargo shape directly affect handling safety and storage efficiency. Standard pallets are easier to automate, while oversized, irregular, or customized pallets require additional engineering evaluation.
Heavy-duty pallet stacker cranes can handle certain non-standard pallets, but the solution must be designed according to the pallet structure, load weight, center of gravity, storage location, and required throughput.
What Are Non-Standard Pallets?
Non-standard pallets may differ from common pallet specifications in length, width, height, load capacity, fork openings, or structural design.
They are often used for:
- Large industrial components
- Automotive parts
- Machinery and metal products
- Customized production materials
- Oversized or unevenly distributed loads
In many projects, the main challenge is not simply the pallet shape. The stacker crane must also manage unstable loads, protruding goods, uneven weight distribution, and inconsistent pallet quality.
1. Standardizing the Load Unit
The most reliable approach is to convert irregular goods into a stable and repeatable load unit.
Load standardization ensures that pallet dimensions, load weight, and load stability remain within the system's allowable range, improving compatibility with the stacker crane, racking, and transfer equipment.
If the original pallet cannot meet automated handling requirements, an adapter or dedicated carrier is usually safer than repeatedly adjusting the crane for different load shapes.
2. Customized Load-Handling Devices
The load-handling device can be designed according to the pallet dimensions and storage layout.
Depending on the application, the stacker crane may use customized telescopic forks, adjustable fork spacing, extended forks, chain conveyors, or other transfer mechanisms.
The selected design must provide sufficient support beneath the pallet and ensure that the load remains stable during extension and retraction.
Fork design should be based on actual pallet drawings, maximum weight, load center, and rack depth rather than pallet width alone.
3. Pallet and Load Detection
Sensors can be installed at the inbound station to check whether the pallet is suitable for automated storage.
Typical inspection items include:
- Pallet length, width, and height
- Cargo overhang
- Pallet position
- Load weight
- Fork opening condition
- Cargo stability
If a pallet exceeds the permitted range or is incorrectly positioned, the system can stop the inbound process and generate an alarm.
This prevents unsuitable pallets from entering the automated storage area and reduces the risk of rack or equipment collisions.
4. Software Parameter Management
The WMS and WCS can manage different pallet types through predefined load-unit data.
Each pallet type may have its own:
- Dimensions
- Weight limit
- Storage zone
- Handling speed
- Fork extension distance
- Safety clearance
When a pallet enters the system, the software identifies its type and assigns an appropriate storage location and handling strategy.
However, software configuration cannot compensate for an unstable or structurally unsuitable pallet. Mechanical safety must always be confirmed first.
5. Structural and Safety Evaluation
Non-standard loads may create different forces on the stacker crane and racking system. Before system design, engineers should evaluate:
- Maximum pallet weight
- Load center and weight distribution
- Pallet strength
- Required rack clearance
- Fork deflection
- Travel and lifting stability
For heavy or oversized loads, the stacker crane structure, motors, braking system, forks, and racking may require reinforced designs.
The crane may also operate at adjusted travel, lifting, or acceleration speeds to maintain load stability.
6. Single-Mast or Double-Mast Configuration
The choice between a single-mast and double-mast pallet stacker crane should be based on load weight, lifting height, operating speed, and system stability requirements.
A single-mast stacker crane can be suitable for moderate loads and projects requiring a lighter equipment structure.
A double-mast stacker crane generally provides greater structural rigidity and may be more appropriate for heavy loads, high storage systems, or applications requiring enhanced stability.
The final configuration should be determined through project calculations rather than pallet shape alone.
Benefits of a Customized Stacker Crane Solution
A properly engineered heavy-duty pallet stacker crane system can provide several benefits.
Reliable Load Handling
Customized forks, carriers, and detection systems help improve the stability and accuracy of pallet storage and retrieval.
Improved Safety
Dimension checks, weight detection, load-position monitoring, and safety interlocks prevent unsuitable pallets from entering the automated warehouse.
Better Space Utilization
Storage locations can be designed around the actual load dimensions, helping manufacturers use vertical warehouse space more effectively.
Reduced Manual Handling
Automated storage and retrieval reduce dependence on manual transport for heavy, oversized, or difficult-to-handle materials.
Consistent Process Control
WMS and WCS software can manage pallet types, inventory locations, handling rules, and equipment tasks within one coordinated system.
How DELIECN Designs Solutions for Non-Standard Pallets
DELIECN provides customized pallet stacker crane systems based on warehouse conditions and actual load requirements.
Before developing a solution, the engineering team evaluates:
- Pallet and cargo dimensions
- Maximum and average load weight
- Pallet material and structure
- Load stability and center of gravity
- Warehouse height and rack layout
- Required storage capacity
- Inbound and outbound throughput
- Interfaces with conveyors, AGVs, or production lines
The solution may include customized stacker cranes, racking, load carriers, inspection stations, conveyors, and WMS/WCS software.
Conclusion
Heavy-duty pallet stacker cranes can handle many types of non-standard pallets, but successful automation depends on proper load standardization and project-specific engineering.
Customized forks, adapter pallets, load inspection, reinforced equipment, and software parameter management can improve handling reliability. Before selecting a solution, companies should provide detailed pallet drawings, load data, warehouse layouts, and operational requirements for technical evaluation.
DELIECN can develop a customized automated storage solution for heavy, oversized, or special palletized loads, covering system planning, equipment manufacturing, software integration, installation, commissioning, and after-sales support.
