Douglas fir pallet lumber

What Douglas fir is

Douglas fir is a major structural softwood of the western US and Canada. The Uniform Standard groups it with western larch as species class 11, Douglas fir-larch, in the medium/high-density sort group. In Europe, Douglas fir appears in PDS as part of European species class 33 (dense European softwoods, with larch and pine); one published European spec reads "European Species Class 33 (Douglas-fir) Standard &BTR".

Key properties

The price per MBF is palletdesign.ai's default cost assumption for green, standard-grade stock, not a market quote. The bending stress is the conservative allowable value palletdesign.ai uses for indicative checks, not a design value from a grading agency.

What Douglas fir does to a pallet

For a GMA-style 48 x 40 stringer pallet (13.5 board feet):

In palletdesign.ai's indicative beam check, the same design checks about 5% stronger in Douglas fir than in mixed hardwood and about 23% weaker in SPF, in line with their allowable bending stresses. That check is a conservative screen, not a rating. Confirm capacity with a PDS analysis or ASTM D1185 test.

Douglas fir sits between the light softwoods and the hardwoods: stronger than SPF in the engine's assumptions and lighter than mixed hardwood when green. The engine's price assumption for it is the highest of the five species, so it tends to make most sense where it is the local supply.

Typical uses

• Pallets built in the western US and Canada, where Douglas fir is the regional species.
• Heavier and racked loads that need more strength than SPF without the weight of green hardwood.
• Export pallets to Europe specified against European class 33 lumber.
• Skids and crate bases from larger dimension lumber. See skids.

Moisture and treatment

Douglas fir is commonly available kiln dried as dimension lumber. For export, remember that kiln drying is not ISPM 15 compliance on its own: the pallet also needs heat treatment and the IPPC mark. See kiln-dried vs heat-treated and ISPM 15.

Nails for Douglas fir

The nail guidance we rely on recommends annularly threaded nails for most softwoods and helically threaded nails for medium- and high-density hardwoods. Douglas fir is a softwood in the medium/high-density sort group, so confirm the nail type with your fastener supplier and hold it to the nail quality minimums. Nail count per joint follows the Uniform Standard by board width. See pallet nails.

Douglas fir's position between SPF and the hardwoods also makes it a reasonable alternate on an RFQ: listing class 11 as acceptable alongside your first-choice species gives western mills a way to quote from stock.

Specifying Douglas fir

Because Douglas fir is often sawn as dimension lumber, give actual sizes rather than nominal names. See nominal vs actual lumber.

How palletdesign.ai uses Douglas fir

Select Douglas fir in the lumber settings or name it in your request. The engine applies its weight factors, the $900 per MBF price assumption and the 1,150 psi allowable stress for indicative rack checks, and you can compare it against other species on the same design.