Douglas Fir is a softwood pallet lumber from the Pacific Northwest.
Detailed Definition
Douglas fir (Pseudotsuga menziesii) is a western North American softwood, most heavily harvested in the Pacific Northwest. Despite the name, it is not a true fir. It has a high strength to weight ratio and is available in long lengths. Its lumber is commonly graded under rules written by agencies such as WWPA and WCLIB and approved by ALSC, and grading and inspection are done by ALSC accredited agencies, of which PLIB is one. It is common in West Coast pallet and crate manufacturing.
Douglas fir in pallets and crates
In the western US, Douglas fir and the Douglas Fir-Larch species group are widely used for stringers, deck boards and crate framing, often alongside hem-fir and other western species. Its stiffness and strength make it a good choice for heavier loads and for skids and crates where long, straight pieces are needed. In the eastern US, pallet mills more often use Southern Yellow Pine or hardwoods, and species choice is largely driven by what local mills produce.
What to check when buying Douglas fir pallets
- Grade and moisture: pallet lumber is often low grade or green. Ask whether components are kiln dried if mold or shrinkage is a concern.
- Export treatment: Douglas fir pallets need ISPM-15 treatment and marking like any other solid wood packaging.
- Weight: Douglas fir is heavier than some western softwoods, which may matter for freight and manual handling.
- Consistency: if a design was engineered for Douglas fir, substituting another species can change the rated capacity.
Pallet design software lets designers compare species for the same load and support condition, which is the fair way to judge a substitution.
Authoritative Sources
- Pacific Lumber Inspection Bureau (PLIB): the lumber grading agency accredited by the American Lumber Standard Committee for Pacific softwoods used in pallet production.
- US Forest Service (USFS): the federal agency that manages the National Forest System and reports on US lumber supply used in pallet production.
Related Glossary Terms
Frequently Asked Questions
Is Douglas fir a good wood for pallets?
Yes. Douglas fir is one of the stronger North American softwoods for its weight and is widely used for structural lumber, so it performs well in stringers, deck boards and crates. Whether it is the right choice depends on local availability and price, the load, and how the pallet will be handled. A pallet designed and rated for Douglas fir should be rebuilt in the same species or redesigned if another species is used.
Is Douglas fir a softwood or a hardwood?
Douglas fir is a softwood, because it comes from a conifer. In lumber terms, softwood and hardwood describe the type of tree, not how hard the wood is. Douglas fir is in fact harder and stiffer than many other softwoods and some hardwoods. It is not a true fir either; it belongs to its own genus, Pseudotsuga, although it is marketed and graded under the fir name.