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Oregon ash
Oregon ash (Fraxinus latifolia)

Family: Oleaceae

Common names: Oregon ash

Distributed in: United States (North America)

Distribution overview: The only Ash native to Northwestern United States, its natural range extends from western Washington to western Oregon, and southward in the Coastal Ranges and Sierra Nevada to Central California. It is also cultivated as a shade tree along the Pacific Coast. The tree thrives in wet soils along streams and in canyons at elevations up to 5500 feet (1676 m).

Common uses: Boxes and crates, Cabinetmaking, Flooring, Furniture , Millwork, Pallets, Paneling , Tool handles, Veneer

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isYellow, Yellowish brownand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureUniformand the lusterSomewhat lustrous

Natural durability: Susceptible to attack by powder-post beetles, Susceptible to insect attack

Odor: No specific smell or taste

Silica Content: Siliceous

Kiln Schedules: Table 290 (Lower Grade, 4/4)

Drying Defects: Distortion, Splitting

Ease of Drying: Requires special attention

Blunting Effect: Medium effect

Boring: Very little variation in size of hole

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Use special attention for best results Gluing done under moderately controlled conditions is reported to produce very good results. Lighter colored adhesives are recommended to prevent visible glue lines in the whitish sapwood

Mortising: Fairly Difficult to Very Difficult

Moulding: Shapes with little difficulty

Movement in Service: Shapes with little difficulty

Nailing: Good nailing qualities, Holds nails well

Planing: Special attention suggested for best

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Poorly

Routing recessing: Fairly Difficult to Very Difficult

Sanding: Good sanding qualities

Veneering qualities: Some logs can be sliced into decorative veneers for paneling and furniture

Screwing: Fairly Difficult to Very Difficult The wood has screwing properties that are comparable, if not superior to other more dense hardwoods ; Turning: Turns well

Staining: Transparent dyes and clear finishes are reported to enhance the natural luster of the wood, after the earlywood vessels are filled. Darker colored stains may darken the lighter colored and permeable earlywood without staining the latewood. Surface scratching in the dense latewood is occasionally a problem ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,46
Density kg/m3
Bending Strength 875 kg/cm2
Crushing Strength 106 kg/cm2
Hardness 515 kg
Impact Strength 81 cm
Shearing Strength 123 kg/cm2
Stiffness 93 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 4 %
Weight 721 576 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 12446 psi
Crushing Strength 1509 psi
Hardness 1137 lbs
Impact Strength 32 inches
Shearing Strength 1754 psi
Stiffness 1333 1000 psi
Specific Gravity 0.46
Weight 45 36 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %

Hardness (side grain) = medium
Bending strength (MOR) = medium
One of the most valuable of the West Coast hardwoods, Oregon ash has moderate properties in hardness and weight, and is considered intermediate in bending strength and stiffness. It has high impact strength, and the combination of hardness and good impact strength makes it very suitable for furniture, paneling, or flooring.

Constantine, Jr. A.J. 1975. Know your Woods - A Complete Guide to Trees, Woods, and Veneers. Revised Edition, Revised by Harry J. Hobbs.Charles Scribner and Sons, New York.Kaiser, J.1987. Wood of the Month: Ash - A Big Leaguer's Choice.Wood & Wood Products, September 1987. Page 40.Little, E.L.1980.The Audubon Society Field Guide to North American Trees - Western Region.Published by Arthur A. Knopf, New York.Niemiec, S.S., G.A. Ahrens, S. Willits, and D.E. Hibbs. March, 1995. Hardwoods of the Pacific Northwest. Oregon State University, College of Forestry,Research Contribution 8, Forest Research Laboratory, Department of Forest Products, Corvallis, Oregon.Panshin, A.J. and C. de Zeuuw. 1980. Textbook of Wood Technology: Structure, Identification, Properties, and Uses of the Commercial Woods of the United States and Canada, Fourth Edition. McGraw-Hill Series in Forest Resources, McGraw-Hill Book Company, New York.
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