![]() Fixing: nails tend to follow the growth rings due to deflection by latewood bands be careful when using standard fastening and fittings use a nailing gun for good results.Machining: keep planer blades sharp when dressing to avoid compressing the softer earlywood and causing ridged surfaces.Hardness: firm (rated 4 on a 6-class scale) to indent and work with hand tools.Seasoning: to avoid distortion, dry framing sizes at high temperatures boards may be air-dried or kiln-dried at conventional or high temperatures.Preservation: immature plantation-grown stems are almost entirely sapwood, which typically comprises more than 50% of the stem radius even in mature plantations sapwood readily impregnates with commercial preservative but the heartwood can’t be adequately treated using available commercial processes.Lyctine susceptibility: sapwood is not susceptible to lyctid borer attack.Durability in-ground: Class 4 (life expectancy less than 5 years).Durability above-ground: Class 4 (life expectancy less than 7 years).Unit shrinkage: 0.29% (tangential), 0.20% (radial)-these values apply to timber reconditioned after seasoning.Joint groups: J4 unseasoned, JD3 seasoned.Stress grades: F4, F5, F7, F8, F11 (unseasoned) F7, F8, F11, F14, F17 (seasoned) when visually stress-graded according to AS 2858-2008: Timber-Softwood-Visually stress-graded for structural purposes.densa-(S5) unseasoned, (SD5) seasoned (brackets indicate provisional value). Density: 625kg/m 3 at 12% moisture content about 1.6m 3 of seasoned sawn timber per tonne. ![]()
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