Lumber Weight

How much does a Sitka Spruce 2×4 weigh?

A Sitka Spruce 2×4, 8 ft weighs 8.0 lb (3.6 kg) at 12% moisture content, kiln-dried.

27.5 lb/ft³ · 5.33 bd ft ·

The answer above uses the actual dressed size — a nominal 2×4 of Sitka Spruce measures 1-1/2″ × 3-1/2″ once surfaced dry (PS 20-25) — and the species' basic specific gravity of 0.37 from the USDA Wood Handbook. At 12% moisture content that works out to 27.5 lb/ft³, or 1.0 lb per linear foot.

2×4 nominal vs 1-1/2″ × 3-1/2″ actual
Dashed: nominal 2×4. Solid: actual dressed size, surfaced dry (PS 20-25).

Sitka Spruce 2×4 weight by length

Weight of one Sitka Spruce 2×4, by length and moisture condition
Length12% MC15% MC19% MC (KD max)GreenBoard feet
6 ft 6.0 lb 6.1 lb 6.2 lb 7.6–13.0 lb 4.00 bd ft
8 ft 8.0 lb 8.1 lb 8.3 lb 10.1–17.3 lb 5.33 bd ft
10 ft 10.0 lb 10.2 lb 10.4 lb 12.6–21.6 lb 6.67 bd ft
12 ft 12.0 lb 12.2 lb 12.5 lb 15.1–25.9 lb 8.00 bd ft
14 ft 14.0 lb 14.3 lb 14.6 lb 17.6–30.3 lb 9.33 bd ft
16 ft 16.0 lb 16.3 lb 16.6 lb 20.1–34.6 lb 10.7 bd ft
20 ft 20.0 lb 20.4 lb 20.8 lb 25.2–43.2 lb 13.3 bd ft

Green weights show the heartwood-to-sapwood moisture range (41%–142% MC for this species) — a fresh-cut board lands somewhere inside it. Board feet use nominal dimensions, as lumber is priced; weight uses actual dimensions. Expect ±10-15% piece-to-piece variation in any stack. How these are computed.

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