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A practical guide to timber pack labelling in New Zealand. Covers every field a pack tag should carry, barcode formats, tag durability, and common labelling mistakes.
There is no single national standard for what a NZ timber pack label should look like. Unlike treatment branding (covered by NZS 3640) or structural grade stamps (covered by NZS 3631 and AS/NZS 1748), pack labels are largely mill-specific. Each operation develops its own format based on what works for their yard, their customers, and their dispatch process.
That lack of standardisation means there’s a wide range of label quality out there. Some mills produce detailed, scannable pack tags with every field a customer could want. Others staple a handwritten slip to the strapping and call it done. Both approaches technically work, but only one scales when you’re tracking thousands of packs through treatment, kiln drying, yard storage, and dispatch.
This guide covers what a well-designed NZ pack label should include, why each field matters, and the practical trade-offs around tag materials and barcode formats.
The unique identifier for this pack. This is the field that ties the physical pack to its digital record, so it needs to be both human-readable and machine-scannable.
Common formats in NZ mills:
Whatever format you choose, the important thing is uniqueness. No two packs should ever share an ID, even across years. If you’re reusing numbers annually, you’ll eventually have a stocktake where PACK-1500 from 2024 gets confused with PACK-1500 from 2026.
For barcode scanning operations, the pack ID is encoded as a barcode on the label. More on barcode formats below.
The timber species in the pack. For most NZ operations this will be one of: Radiata Pine (the dominant species at ~91% of NZ planted area), Douglas Fir (~6% of plantation, mostly Otago/Southland/Canterbury), Macrocarpa (farm forestry, naturally durable), or one of the less common species like Larch, Eucalyptus, or Cypress hybrids.
Species affects treatment options, structural grade availability, drying schedules, and pricing. A pack of Douglas Fir has a higher base value than Radiata of the same dimensions, and different treatment considerations since Douglas Fir heartwood has moderate natural durability.
The stress grade assigned to the timber in this pack. In New Zealand, the standard structural grades are SG6, SG8, SG10, and SG12. These replaced the older MSG/VSG system in 2011. The grade indicates the timber’s characteristic modulus of elasticity (stiffness) in GPa.
The grade should match the brand stamp on the individual pieces within the pack. If the pack contains mixed grades (which it shouldn’t, but it happens), the label should reflect the lowest grade present.
For non-structural packs (appearance, fencing, packaging), use the appropriate appearance or utility grade designation rather than leaving the field blank.
The hazard class of preservative treatment applied: H1.2, H3.1, H3.2, H4, H5, or Untreated.
This field is critical for compliance and for preventing costly bin-mixing errors. H1.2 boron-treated framing and H3.2 CCA-treated outdoor timber may look similar from a distance (both are light-coloured Radiata), but they serve completely different end uses and have different pricing. Mixing them in the yard creates problems that cascade through to dispatch and customer complaints.
If the pack has been treated, also include:
This data is required under NZS 3640 for treatment branding on individual pieces, but having it on the pack tag as well saves time during dispatch and customer queries. The NZTPC (New Zealand Timber Preservation Council) maintains a register of licensed treatment plants and their ID numbers.
Whether the timber is rough sawn (RS), gauged (GAU), or dressed (DAR/PAR). And whether it’s green (wet, fresh off the saw), kiln dried (KD), or air dried (AD).
For kiln-dried timber, some mills also include the target moisture content percentage. SG8 framing timber typically targets 18% MC at delivery. Joinery and dressing grades target 10-12%.
The cross-section dimensions in millimetres (width x height) and the length(s) in metres. Common NZ framing dimensions: 90x45, 140x45, 190x45, 240x45, 290x45 mm.
If the pack contains mixed lengths, list the range (e.g., “3.6-6.0m”) and include the total lineal metres or the piece count broken down by length.
How many individual pieces of timber are in the pack. Combined with dimensions and lengths, this allows calculation of total volume.
Total volume in cubic metres (m3). This is the primary unit for pricing and inventory in NZ. Calculate as: pieces x width(m) x height(m) x length(m).
For mixed-length packs, calculate each length group separately and sum.
The date the pack was created. This matters for FIFO stock rotation and for tracking timber age, especially for green timber where time since sawing affects drying behaviour and the risk of sapstain.
The current yard location or station where the pack is stored. This is primarily an internal field for yard management, but it’s useful for forklift operators and stocktake crews. If you’re running multi-site operations, include the site identifier as well.
If the pack has been sold or allocated to a specific customer order, include the customer name and/or order number. This helps dispatch teams pull the right packs and prevents allocated stock from being accidentally dispatched to someone else.
If your mill holds Forest Stewardship Council or PEFC chain-of-custody certification, the pack label should carry the relevant certification number and claim (“FSC Mix” or “PEFC Certified”). This is a certification requirement for maintaining chain of custody through the supply chain.
For packs destined for export, the IPPC (International Plant Protection Convention) mark is required under ISPM 15. This certifies the timber has undergone an approved phytosanitary treatment, typically heat treatment to a core temperature above 56C for 30 minutes. The mark includes the country code (NZ), producer number, and treatment code (HT for heat treatment, MB for methyl bromide).
Not every pack needs this, but if you export and track ISPM 15 compliance at the pack level, including it on the label avoids scrambling at dispatch time.
Some mills photograph each pack at creation for quality documentation. If you’re capturing pack photos, a reference on the label linking to the digital photo is useful for dispute resolution and quality audits.
If you’re using barcode scanning, the choice of barcode symbology affects scanning reliability in the yard. For a full guide on designing a scanning workflow around these barcodes, see our barcode workflows article.
The most common choice for timber pack labels in NZ and Australia. GS1-128 is a linear (1D) barcode that encodes alphanumeric data. It’s widely supported by all commercial barcode scanners, reads reliably at a reasonable distance (30-60cm depending on barcode width), and can encode your pack ID in a compact format.
For most sawmill operations, a simple Code 128 barcode encoding your pack ID string is sufficient. If you need to encode additional data in the barcode itself (species, grade, treatment), consider application identifiers per the GS1 standard, but keep in mind that longer barcodes are harder to print legibly on tag stock and slower to scan.
QR codes can encode significantly more data than 1D barcodes and are more tolerant of damage (they include error correction). The trade-off is that not all ruggedised PDA scanners read 2D codes natively, and QR codes require a larger print area for reliable outdoor scanning.
For most NZ mills, 1D Code 128 remains the practical choice. Use QR codes if you need to encode a URL linking to the pack’s digital record, or if your scanning hardware supports it natively.
This is where a lot of mills get caught out. A beautifully designed label means nothing if it’s illegible after two weeks in a timber yard.
Cheap and easy to print. Disintegrate in rain. Only suitable for indoor or short-term outdoor use. If your packs move through treatment (submersion in preservative solution), paper tags will not survive.
Paper sealed in a plastic pouch. Better than bare paper but the lamination can crack at fold points and let moisture in. Moderate durability, typically lasts 2-3 months outdoors.
The standard for outdoor timber pack labels. Tyvek is tear-resistant, waterproof, and takes thermal-transfer printing well. Polypropylene tags are similarly durable. Both handle UV exposure and rain without degrading for 6-12 months.
For mills running packs through CCA treatment, test your tag material with the actual treatment solution. Some synthetic stocks discolour or become brittle after submersion in copper-based solutions.
The most durable option. Stamped aluminium or injection-moulded plastic tags attached with wire or cable ties. These survive treatment submersion, kiln drying (up to 120C+ for HT kilns), and years of outdoor exposure. The trade-off is cost and the inability to print variable data without a specialised stamping or embossing setup.
Some mills use a hybrid approach: a durable metal clip-tag with a stamped pack ID for permanent identification, plus a printed synthetic label for the detailed data. The metal tag survives conditions that destroy the paper label.
How the label stays on the pack matters as much as what’s printed on it.
Staple to strapping: Common but unreliable. Tags pull free when strapping is cut or loosened. Suitable for short-term tracking only.
Cable tie through grommet: More secure. Requires a grommeted tag. The cable tie can be routed through the strapping or wired to an outer piece. This is the standard for packs that will be stored outdoors for weeks or months.
Self-adhesive: Quick to apply but fails in wet conditions and on rough-sawn surfaces. Generally not suitable for outdoor timber pack labelling.
Staple gun directly into timber: Destructive but very secure. The label stays attached until someone physically removes it. Works well for end-of-pack labelling on the exposed cut face.
Missing treatment class. The most consequential omission. When a pack arrives at a customer without a clear treatment class on the tag, the customer has no way to verify what they received without lab testing. This creates liability issues and erodes trust.
Illegible barcodes. A barcode printed on a low-resolution thermal printer with insufficient contrast won’t scan reliably. Test your printed barcodes with your actual scanning hardware in actual yard conditions (sunlight, rain, dust on the lens) before committing to a print setup.
Reusing pack IDs. Already covered above, but it bears repeating. A pack ID is a primary key. Reuse it and your inventory data becomes unreliable.
Labels that don’t survive the process. If your packs go through treatment or kiln drying after labelling, your labels need to survive those processes. Test this before you label 500 packs and find them all illegible on the other side.
No label at all. The default failure mode. A pack without a label is effectively invisible to any tracking system. It becomes an “unknown” at the next stocktake and requires manual investigation to identify. The cost of a label is negligible compared to the cost of investigating unidentified packs.
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