Cold Storage Plastic Pallets for AS/RS: A Selection and Testing Guide
Specify the temperature cycle, load and equipment interfaces together, then agree a representative trial before approving a cold-store pallet.
In this guide
A plastic pallet for an automated cold store must fit the whole route: the cold room, rack supports, conveyors, transfer equipment and the actual unit load. A minimum temperature alone does not establish impact resistance, rack capacity or reliable transfer.
This guide helps buyers and integrators prepare a project specification. It describes an illustrative application, not a completed customer project or a guarantee for a particular pallet.
1. Map the temperature cycle
Record the lowest and highest temperatures at each stage, time in each zone, transition frequency and where handling occurs. A pallet stored continuously in a freezer may face a different duty from one repeatedly moving through an ambient staging area. Include defrost periods, cleaning and time spent waiting at the entrance where relevant.
Ask the supplier for the operating-temperature information for the exact pallet and material configuration, including its basis and any restrictions. Do not infer a temperature rating from the material name alone. The UK HSE’s Pallet safety guidance notes that plastic pallets handled roughly in the cold can suffer brittle fracture; it recommends checking for cracks and other mechanical damage. Site-specific handling and manufacturer guidance still apply.
2. Describe the load and rack support
Provide the total loaded mass, packaging type, load footprint, centre of gravity and expected storage duration. Include a photograph or drawing of the load bottom: cartons, drums and bags can contact the deck in different ways even at the same total weight.
For each rack position, identify support direction, beam or rail spacing, contact width and pallet orientation. Ask what the stated rack rating covers: the pallet configuration, load distribution, support arrangement, temperature, duration and deflection criteria. A catalogue figure without those conditions is not enough to approve a different setup. See the rack-load guide and unit-load dimensions guide.
3. Match the deck and base to the route
| Decision | Information to check |
|---|---|
| Grid or solid deck | An open deck can aid drainage and inspection; check that the real load is adequately supported over openings. For a solid deck, review water collection and cleaning needs. |
| Base and orientation | Mark runner direction and contact surfaces at roller conveyors, chain transfers, lifts and rack positions. Do not assume pallets of the same footprint have interchangeable bases. |
| Pickup and detection | Check fork or shuttle clearances, stops, guides, sensors and labels against the approved drawings. |
| Reinforcement | If specified, identify its position and configuration; discuss exposure, cleaning and any corrosion concerns with the supplier. |
Compare candidate grid three-runner and solid three-runner families against the equipment drawings. Selection remains subject to the exact model and project conditions. The conveyor and shuttle guide explains what to collect.
4. Plan for moisture and handling
Temperature transitions can create condensation or frost. Identify where water might collect, how the pallet is cleaned and dried, and whether packaging or labels remain fit for use. Review load stability and pallet movement on the actual contact surfaces when wet or frosted; do not assume an anti-slip feature works under every condition.
Record impact-prone points such as forklift entries and transfers. Inspect pallets at agreed points and hold damaged or uncertain units for review under the site procedure. Use the inspection checklist to document the affected area and decision.
5. Agree the sample trial before ordering
Use a sample matching the intended model, material, base, reinforcement and other options. Agree responsibilities, conditioning temperature and duration, sample quantity, measurements and pass/fail limits with the pallet supplier and equipment provider before testing.
- Condition and record: identify each sample, its initial condition and temperature history. Measure the dimensions relevant to the route.
- Reproduce the load: use the agreed mass, distribution and contact pattern. Include representative packaging and temperature transitions where practical.
- Check the route: assess empty and loaded movement through applicable infeed, transfers, pickup and storage interfaces under agreed conditions. Record sensing, clearance and any unusual contact.
- Review after the trial: record visible condition, dimensions and any deflection using the agreed method and timing. Log exceptions, approver and configuration revision.
One successful pass only demonstrates that particular pass; it does not establish lifetime performance. Arrange the trial safely under the equipment owner’s procedures. For a more detailed record, use the sample testing checklist.
Frequently asked questions
Is HDPE automatically suitable for every freezer?
No. Ask for the intended pallet’s material and temperature information, then review the actual handling, load and test conditions. A resin name alone does not approve a complete pallet for a specific route.
Does a rack-load rating at room temperature apply in a freezer?
Not automatically. Obtain the conditions behind the rating and agree how the proposed temperature, support, load and dwell time will be evaluated.
Is a grid deck always the best choice?
No. It can help drainage and inspection, but the load must be supported adequately. Compare the actual packaging and cleaning requirements with both deck designs.
Prepare a cold-store pallet enquiry
Send BAOHENG the temperature profile and cycle, loaded mass and footprint, packaging photos, storage duration, rack support drawing, conveyor and pickup interfaces, cleaning conditions and required quantity. Mark unknowns as “to confirm” and include any equipment-provider acceptance criteria. Contact us to discuss candidate configurations and the information needed for a sample trial.
Source and image note
- UK HSE, Pallet safety (PM15), page 12: plastic-pallet condition checks and cold-handling considerations. This is general guidance, not a statement of local legal requirements.
- The route checklist and sample plan are editorial tools, not test results or universal acceptance criteria. The cover is AI-generated.
