自1964年以来，加拿大拥有并运营，引以为傲
2" x 8" #2 & Better Fir KDHT S4S Dimensional Lumber
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2" x 8" #2 & Better Fir KDHT S4S Dimensional Lumber
This is a 2x8 in #2 & Better fir, kiln dried and heat treated (KDHT) and surfaced smooth on all four sides (S4S). It measures 1-1/2 in. x 7-1/4 in. actual and comes in 8, 10, 12, 14, 16, 18, 20 and 22 ft lengths.
#2 & Better is the general framing grade. It is sound for structural and non-structural work, and it is the grade most framing plans call for. Span, load and local code decide the size you need, so confirm it with your building inspector or engineer. #2 & Better fir is not an appearance grade.
Features and Common Uses
- No. 2 & Better grade, a framing grade used for structural and non-structural work
- Fir is a strong, stiff framing softwood that holds nails and screws well.
- Kiln dried to 19% moisture content or less, so it arrives drier and more stable than green lumber
- Heat treated (KD-HT) to a core temperature of at least 56 C for a minimum of 30 minutes
- Surfaced smooth on all four sides (S4S) for a consistent 1-1/2 in. x 7-1/4 in. actual size
- Sold in packs of 147 pieces
- Not pressure treated, so it is for dry, above-ground use
Commonly used for:
- Wall studs, plates, joists and rafters
- Posts, headers and beams where the plan calls for #2
- General framing and carpentry
- Decks, sheds and outbuildings
- Framing for single and multi-family homes, additions, barns, sheds, and commercial and industrial construction
- Non-structural bracing for concrete forming and packaging for shipping
Specifications
| Product | 2x8 No. 2 & Better Fir, KDHT, S4S |
|---|---|
| Species | Fir |
| Grade | No. 2 & Better |
| Nominal size | 2 in. x 8 in. |
| Actual size | 1-1/2 in. x 7-1/4 in. |
| Available lengths | 8, 10, 12, 14, 16, 18, 20 and 22 ft |
| Pack size | 147 pieces |
| Moisture content | Kiln dried, 19% maximum |
| Heat treatment | KD-HT, core temperature of at least 56 C for 30 minutes |
| Surfacing | S4S, surfaced on four sides |
| Pressure treated | No |
Grade, species and heat-treatment marks are stamped on each board and are the governing record for the piece you receive. Span, load and local code decide where the lumber can be used, so confirm with your building inspector or engineer for structural work. #2 & Better fir is not an appearance grade. See also Griff's Dimensional Lumber Grading Guide.
Frequently Asked Questions
What does No. 2 and Better mean?
It is a visual framing grade. No. 2 and Better boards are sound for general structural use and can include higher grades above No. 2, so you get a consistent, reliable board.
What does KDHT mean?
KDHT means kiln dried and heat treated. The board is dried to 19% moisture content or less and heated to a core temperature of at least 56 C for a minimum of 30 minutes. It is a heat process, not a chemical preservative treatment.
What is the actual size of a 2x8?
A 2x8 measures 1-1/2 in. x 7-1/4 in. once surfaced. The 2 in. x 8 in. name is the nominal size from before the board was dried and planed.
Can I use it outside?
Only where it stays dry and above ground, or for short-term use. It is not pressure treated, so it will rot in ground contact or constant wet. Choose pressure treated lumber for buried posts and outdoor structures.