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3" x 12" #1 & Better Green Rough Fir Dimensional Lumber
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3" x 12" #1 & Better Green Rough Fir Dimensional Lumber
This is a 3x12 in No. 1 & Better fir, sold green and rough sawn. It is a heavy plank and beam size in 16 and 20 ft lengths, used for concrete forming and shoring, landscape structures and exposed timber work.
Green and rough means it is not dried or planed. The board still holds its moisture, so it shrinks, and can twist or check, as it dries in place. The surface keeps its sawn texture and the finished dimensions vary from board to board, so check the size against your layout before you order. Contact us if you need a dimension confirmed.
Features and Common Uses
- No. 1 & Better grade fir, a grade with fewer and smaller defects than No. 2 and suited to heavier construction
- Green, with a moisture content above 19%, so it is soft to cut and nail and costs less than kiln-dried stock
- Rough sawn, keeping the texture left by the sawmill for an exposed, rustic look
- 3 in. nominal thickness carries more load than a 2x12 over the same span
- Not pressure treated, so it is for dry, above-ground or temporary use
Commonly used for:
- Concrete forming, shoring and temporary supports
- Landscape structures, ramps and heavy-duty platforms
- Exposed beams, mantels and rustic timber features
- Heavy planking for sheds, barns and farm structures
Specifications
| Product | 3x12 No. 1 & Better Fir, Green, Rough |
|---|---|
| Species | Fir |
| Grade | No. 1 & Better |
| Nominal size | 3 in. x 12 in. |
| Available lengths | 16 and 20 ft |
| Moisture content | Green, above 19% |
| Surface | Rough sawn, not planed |
| Pressure treated | No |
Rough-sawn lumber is not milled to a fixed finished size, so actual thickness and width vary by board and by sawmill. Grade and species are stamped on each piece and are the governing record for what you receive. Confirm the dimensions you need at the counter before you order.
Frequently Asked Questions
What does green rough mean?
Green means the board has not been kiln dried and holds moisture above 19%. Rough means it is sawn but not planed, so the surface keeps its sawmill texture. Expect shrinkage as it dries.
What does No. 1 and Better mean?
It is a visual grade. No. 1 & Better boards have fewer and smaller knots and defects than No. 2, and the grade can include higher grades above No. 1. It is a step up from the #2 & Better stock used for general framing.
What is the actual size of a 3x12?
It varies. A rough-sawn 3x12 is not planed to a set finished size, so the actual thickness and width differ from board to board. Contact us if a specific dimension matters for your project.
Will it shrink or warp?
Yes, some. Green lumber loses moisture as it dries and can twist, cup or check. Stack it flat with spacers and keep it supported, or choose kiln-dried stock where a stable board matters.
Can I use it outside?
For above-ground and temporary use, yes. It is not pressure treated, so it is not suited to ground contact or long-term wet exposure. Choose pressure treated lumber for those jobs.