Oregon (Douglas Fir)

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		Oregon (Douglas Fir) Botanical Name: Psuedotsuga menziesii Common Name(s): Origin: North America
OverviewBasic InfoTechnical General: Its heartwood is a pale pinkish-brown, with the sapwood being quite lighter, almost white.  It is a straight grained softwood which is relatively strong given its light weight. It has alternating bands of high and low density timber in the annual rings resulting in uneven wear, however this is sometimes made into a feature by snadblasting them to make them stand out prominently. Seasoning: The timber seasons well Uses: Most commonly useed for exposed rafters and beams. Availability Stocked: Yes Price: Alternatives: Oregon Supply - Resource Certification Durability - Durability Durability Durability (Above Ground): Density Density Air Dried 470 kg/m² Shrinkage Shrinkage Radial 2.8 % (Green to 12% MC) Shrinkage Tangental: 4.9 % (Green to 12% MC) Stability Stability Mechanical Properties Mechanical Links Janka Hardness: (Average) 3.6 kN Modulus of Rupture / Bending Strength: 78.3 MPa (N/mm² or MN/m²) Modulus of Elasticity / Stiffness: 8.8 GPa (GN/m²) Moisture Meter Reading Corrections Moisture Meter Reading Corrections: Fire Indicies Ignitability Index: (NZ/AS 1530.3) 14 Flame Spread Index: (NZ/AS 1530.3) 9 Heat Evolved Index: (NZ/AS 1530.3) 9 Smoke Developed Index: (NZ/AS 1530.3) 3

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