Use the same master-carton terms across purchasing, packing, storage, and pallet planning.
Operational meaning
Master-carton planning connects a finished inner pack with case quantity, row-column-layer arrangement, internal carton size, tare, gross weight, and external cube. These terms should remain distinct because changing one can affect fit, handling, pallet count, and storage even when the saleable unit is unchanged.
Definitions and operating notes
- Packed unit
- The finished inner item or retail pack placed into the master carton.
- Case pack
- The standard number of saleable units assigned to a sealed case or carton.
- Columns, rows, layers
- The explicit orthogonal arrangement used for the dimension estimate.
- Internal dimensions
- Usable carton space for the planned layout, gaps, dividers, and clearance.
- External dimensions
- Finished outside dimensions used for cube, storage, and unit-load planning.
- Tare weight
- Carton, dividers, liners, closure, and other packing weight without product.
- Gross packed weight
- Product weight plus tare weight for the completed carton.
- Carton cube
- External length × width × height, stated in a consistent cubic unit.
Applied example
Twelve 8 × 5 × 3 in inner packs arranged 3 × 2 × 2 require layout space plus specified gaps and outer clearance. The resulting internal dimensions are not the external carton dimensions. Gross weight adds twelve packed-unit weights to carton, divider, label, and closure tare.
Key distinctions
| Term or question | Operational distinction |
|---|---|
| Case pack | Standard saleable units assigned to one sealed carton. |
| Layout | Columns, rows, and layers describing the intended physical arrangement. |
| Tare | All carton and packing weight without product. |
| Cube | Finished external length × width × height used for occupied-space planning. |
How to use this reference
- Measure the finished inner pack.
- Choose and record an allowed layout.
- Calculate internal size and prototype the carton.
- Measure external dimensions and gross weight before pallet planning.
Record structure and maintenance
For each carton specification, record the packed-unit revision, case pack, allowed layout, measurement unit, effective date, and source drawing or physical sample. Preserve the original measured values before operational rounding.
Link internal dimensions to the layout and prototype that established them. Record external dimensions and gross packed weight from the finished carton, and keep tare as a separate measured value.
Supersede the record when the product, inner pack, carton, divider, closure, or case pack changes. Recheck dependent weight, cube, storage, and pallet calculations before releasing the revision.
Verification cautions
- Dimensions do not select board strength.
- Weight margin must cover variation.
- Mixed orientations need explicit design.
- A prototype is required before release.