Jarrah

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		Jarrah Botanical Name: Eucalyptus marginata Common Name(s): Origin: Australia
OverviewBasic InfoTechnical General: A large tree producing a light to dark red timber darkening to a uniform red brown mahogany colour. It can have a straight or interlocked grain with an even medium coarse texture. Seasoning: Seasons readily by air or kiln drying although there can be some warping due to sloping grain and some care is required to prevent checking in wide boards. Pre-air-drying is recommended. Working: It machines, nails and glues well; takes an excellent polish and holds paint very well. It is also prized as a carving timber. Uses: One of the world’s most durable timbers and highly resistant to fire, termite and marine borer attack and impervious to acids. Jarrah has a very wide range of uses, previously regarded as a heavy construction timber for bridges and wharves it is now favoured for interior finishing, joinery, cabinet-making and flooring. Availability Grade: Select Stocked: Yes Price: Availability: Available ex-stock in sizes from 100x25 to 300x50mm Supply - Resource Certification Primary Supplier(s): Gunns Western Australia Resource Certification: ISO 14001 Durability - Durability Durability (In Ground) Durability (Above Ground): Very Durable Density Density Air Dried 820 kg/m² Shrinkage Shrinkage Radial More than 5% % (Green to 12% MC) Shrinkage Tangental: More than 8% % (Green to 12% MC) Stability Stability Kiln Dried Stable Stability Green: Prone to shrinkage and distortion Mechanical Properties Mechanical Links Janka Hardness: (Average) 10 kN Modulus of Rupture / Bending Strength: 112 MPa (N/mm² or MN/m²) Modulus of Elasticity / Stiffness: 13 GPa (GN/m²) Maximum Crushing Strength: 61 MPa (N/mm² or MN/m²) Moisture Meter Reading Corrections Moisture Meter Reading Corrections: Fire Indicies Ignitability Index: (NZ/AS 1530.3) 13 Flame Spread Index: (NZ/AS 1530.3) 3 Heat Evolved Index: (NZ/AS 1530.3) 4 Smoke Developed Index: (NZ/AS 1530.3) 2 Flame Spread Index: (ASTM E84) 42

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