MANUFACTURING / JAPAN SOURCING
Corrugated box specifications: dimensions and thickness leave the load open
A replacement box may fit the product and still fail under a different stack or humid route. Describe the packed contents, dimensional basis, stacking and exposure before comparing box proposals.
First say which dimensions you mean
A buyer asks for the same length, width, height and board thickness as an existing shipping box. One quote describes usable internal space; another describes outside dimensions. Without the dimensional basis, the buyer cannot compare fit, pallet layout or the delivered construction.
Attach a drawing or an identified sample. Define internal or external dimensions, the orientation and units, and how the assembled box is measured. Include dividers, cushioning and packing clearances. Ask the box maker to resolve fit on an actual packed sample rather than inferring it from a product dimension alone.
A style identifier does not specify the whole box
FEFCO’s public code overview describes identifiers for packaging designs.[1] Agree the style, closure, board construction and any printing, cut-outs or internal fittings in addition to dimensions. A style code is useful for shape; it does not by itself state the strength needed for this shipment.
Describe the packed product, count, total packed mass and how it is supported. If the proposal changes liner, medium, flute or joint construction, ask what the change means for the agreed evaluation. Thickness alone cannot close those questions.
Show the box in its intended stack and environment
NX Logistics Research Institute explains how moisture and stacking arrangement can affect corrugated-box compression performance.[3] Its illustrated reduction figures are not coefficients for this order. Give the supplier the expected stack, pallet arrangement, storage time and moisture exposure so it can assess the actual design inputs.
Include the pallet footprint, box orientation, number of layers, any overhang or offset, and whether another pallet or load will be placed above. Mark unknowns. Do not turn the number of layers into a universal safe load or assume a short laboratory compression result proves long-term stacking performance.
- 1Fit: dimensional basis, packed product and internal components
- 2Load: packed mass, stack arrangement and supporting pallet
- 3Exposure: storage time, moisture and agreed evaluation conditions
Schematic design inputs only. The stack is not a recommended layout; no load rating, safety factor or qualified test plan is implied.
Ask what the reported test actually measured
FEFCO’s public list separates board tests from compression and drop tests for packaging, and also lists internal-dimension measurement.[2] Match the report to its object: a board property is not the same record as a test on the assembled box or the complete packed product.
Ask the packaging specialist to propose the applicable method and version, preparation/conditioning, sample construction, loading or handling conditions, acceptance criteria and reporting. Retain the box and packing revisions with the results. The index alone does not supply a test procedure or pass limit.
| Item | Give the box maker | Ask it to identify |
|---|---|---|
| Fit and construction | Give the box makerDrawing/sample, dimension basis, contents and fittings | Ask it to identifyProposed construction, tolerances and packed fit check |
| Stack and storage | Give the box makerPacked mass, layers, pallet layout, time and loads above | Ask it to identifyDesign assumptions and unresolved load cases |
| Environment | Give the box makerRoute, storage, humidity/wetting exposure and unknowns | Ask it to identifyConditions represented in evaluation and gaps |
| Test evidence | Give the box makerRequired outcome for product and package | Ask it to identifyTest object, method/version, conditions, results and acceptance owner |
Keep a material change visible in a repeat order
If a cheaper repeat-order proposal changes construction, the earlier result may no longer cover the offered box. Ask which evidence remains applicable, which fit or performance checks need repeating and who approves the change before supply.
An initial enquiry can start with a sample and incomplete route information. Send what is known about the packed product, sizes, total mass, pallet/stack arrangement, storage and destination, then identify the missing inputs the box maker needs to propose a suitable trial.
Questions to send your supplier
Open supplier questions
Packed product / count / total packed mass: Drawing or sample ID, style, closure and internal components: Dimensions, units, internal/external basis and orientation: Pallet footprint, layout, layers, overhang/offset and loads above: Storage duration, route, destination and moisture exposure / unknowns: Please identify the proposed board and box construction and any substitutions. Please propose fit and performance evaluation, identifying the test object, method/version, conditions, criteria, records and approval owner. Please distinguish existing evidence from checks still required for this packed product and route. Quantity and target receiving date:
Sources
- FEFCO — Code
Public overview of packaging-design identifiers; no full design catalogue or strength specification inferred.
- FEFCO — Testing methods and recommendations
Public index distinguishes board tests, packaging compression/drop tests and internal-dimension measurement. Full methods and numeric limits not used.
- NX Logistics Research Institute — Why corrugated boxes collapse during transport
2016 explanation of moisture and stacking effects. Used qualitatively; its reduction percentages are not design factors for another box or route.