Norway spruce (Picea abies) and silver fir (Abies alba) are the pale, light, straight-grained softwoods from which most European pallets are built. Often sold together as "spruce-fir" or "whitewood," they come mainly from Nordic and Central European forests, nail easily and offer a good balance of strength, weight and cost.
The two species
Norway spruce is Europe's most important commercial conifer, native to northern and mountain Europe and widely planted far beyond its natural range. Silver fir grows in mountain forests of Central and Southern Europe. The two woods are very similar in appearance and are usually processed and graded together.
Typical air-dry density of both is about 400 to 470 kg/m³ (25 to 29 lb/ft³) at 12% moisture content, making them lighter than pine. The wood is creamy white to pale yellow, with little visible difference between sapwood and heartwood. Spruce has a faint resin smell, but its resin canals are small and pitch pockets are less of a nuisance than in pine; fir is essentially free of resin canals in normal wood.
| Property | Spruce and fir (typical) |
|---|---|
| Density at about 12% MC | about 400–470 kg/m³ |
| Color | Pale cream to light yellow |
| Nailing | Easy, with low splitting risk |
| Sapwood stain risk | High if wet; see mould and blue stain |
| Typical use | Pallets, packaging, construction timber, joinery |
Compared with other pallet species, they trade some density for light weight, which keeps pallet tare weight low; see the pallet weight guide.
Where the timber comes from
Pallet-grade spruce and fir are produced in a belt from Scandinavia and the Baltics through Germany, Austria, Czechia and Poland to the Alps and the Carpathians. Sweden and Finland are among Europe's largest sawn softwood producers, and Germany, Austria and Central European mills supply pallet stock across the continent.
Spruce is also a major resource in Russia and Canada. In North America the "SPF" group (spruce-pine-fir) is the standard Canadian softwood lumber designation, grouping several species that are sold interchangeably.
Bark beetles and salvage timber
Spruce is a shallow-rooted tree in many managed forests, and drought, storms and the European spruce bark beetle (Ips typographus) have caused large-scale mortality in Central Europe in recent years. Foresters cut infested and storm-damaged stands quickly to limit the spread, which floods the market with "salvage" or "calamity" timber.
For pallet makers this has two practical effects:
- Supply and price swings. Large salvage volumes depress log prices for a time, then supply tightens as affected stands are exhausted.
- Quality issues. Wood from beetle-killed trees often has blue stain, which affects appearance but, as the Northeastern Lumber Manufacturers Association notes for blue stain generally, usually not strength. Standing dead timber that dried on the stump can also develop checks.
Blue-stained pallet timber may be acceptable for industrial use but may be rejected by food and pharmaceutical customers; see food safety and pallets. Beetle-killed wood is also a concern for importing countries, though it is treated under ISPM 15 like any other wood; see ISPM 15 explained.
Spruce and fir in pallet production
Spruce and fir are cut into the standard components of European pallets: deck boards, stringer boards and blocks. European deck boards are typically in the range of 20 to 25 mm thick and 95 to 145 mm wide, cut to 1200 mm or 800 mm lengths; the exact requirements of the EPAL Euro pallet are in the Euro pallet guide.
For one-way export pallets, producers often use thinner boards of lower grade, while reusable pool pallets use better grades and thicker boards. Quality classes for repaired and new Euro pallets are discussed in EPAL quality classes.
Quality control focuses on the factors defined in lumber grading standards and pallet specifications: knot size and position, wane, splits, bark inclusions and moisture. In Europe, appearance grading of softwoods follows EN 1611-1, with grade designations such as G4-3 and G4-4 typically corresponding to packaging and lower-value uses, according to Swedish Wood. See lumber grading and timber defects.
Drying and treatment
Spruce dries relatively easily and quickly in a kiln, with less tendency to warp than pine or hardwoods when schedules are well controlled. Pallet makers who export must heat-treat finished pallets according to ISPM 15, which requires the wood core to reach 56 °C for at least 30 minutes, and then apply the mark; see heat treatment. Kiln-dried boards of 19% moisture content or lower resist blue stain and mold much better than green or air-dried boards.
Spruce is also naturally somewhat resistant to impregnation, which is why preservative-treated crates in spruce rely on special processes. This is rarely relevant to ordinary pallets, since ISPM 15 treatment is by heat or fumigation, not preservatives.
Frequently asked questions
Is spruce or pine better for pallets?
Spruce is lighter and cleaner, with less resin, while pine is denser and often cheaper in some regions. Both are widely used, and either can meet the same pallet standard if boards meet size, grade and moisture requirements.
Is spruce the same as fir?
Not botanically, but spruce and fir lumber look alike and are commonly sold together as spruce-fir or whitewood. In Canada, spruce-pine-fir (SPF) is a mixed species group.
Does bark beetle damage weaken pallet wood?
Beetle-related blue stain is mostly cosmetic. Severely decayed or heavily cracked salvage wood should be excluded by normal quality grading.
What density does spruce have?
Air-dry spruce and fir typically weigh about 400 to 470 kg/m³, though individual boards vary.
Sources
- Wood grades — Swedish Wood
- Sawn timber: appearance grading of softwoods, European spruces, firs, pines and Douglas fir (EN 1611-1) — British Standards Institution
- Beware of Blue Stained Wood in Wood Packaging Materials — Northeastern Lumber Manufacturers Association
- Wood Handbook: Wood as an Engineering Material — USDA Forest Products Laboratory