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Oregon white oak
Oregon white oak (Quercus garryanna)

Family: Fagaceae

Common names: Brewer oak, Garry oak, Oregon oak, Oregon white oak

Distributed in: Canada, United States (North America)

Distribution overview: The species occurs from south-western British Columbia southward to central California in the Coastal ranges and Sierra Nevada. It is usually found in pure stands or in a mixture with other oaks in valleys and on mountain slopes at elevations of up to 3000 feet (914 m) in the north, and 1000 to 5000 feet (305 to 1524 m) in the south.

Common uses: Boxes and crates, Caskets, Cooperages, Flooring, Fuelwood, Furniture , Millwork, Mine timbers, Pallets, Posts, Railroad ties, Tool handles, Turnery, Veneer

Product sources: Various species in the white oak group, including Oregon white oak, are mixed together for commercial purposes. Supplies are abundant, especially in the form of veneers, at moderate prices.

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 250-300 cm

Colors: the heart isWhite, Yellowand the sapwoodWhitish to light brown , Yellow.The grain isUsually straight , the textureMediumand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Odor: No characteristic odor or taste when dry

Kiln Schedules: US=T3-B1/T3-B1

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Internal Honeycombing Possible, Splitting

Ease of Drying: Slowly

Comments: High tannin content tends to promote staining if the wood is brought into contact with certain metals under moist conditions

Blunting Effect: Moderate

Boring: Bored surfaces are smooth Bored holes are often uniform in size

Cutting Resistance: Easy to saw A hook angle of 15 to 20 degrees, a sharpness angle of 55 degrees and slow feed rates have been recommended in sawing

Gluing: Fairly Easy to Very Easy

Mortising: Responds well to mortising operations

Moulding: Very Good to Excellent

Movement in Service: Very Good to Excellent

Nailing: Wood is hard , Wood is heavy and hard

Planing: Responds very well to machining

Resistance to Impregnation: Sapwood is difficult to treat

Response to hand tools: Fairly Difficult to Difficult to Work

Sanding: Fairly Easy to Very Easy

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Very Good to Excellent Results

Screwing: Pre-boring recommended, Very Good to Excellent Results; Turning: Responds well

Painting: Very Good to Excellent; Polishing: Well defined ; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,68
Density kg/m3
Bending Strength 709 kg/cm2
Crushing Strength 145 kg/cm2
Hardness 738 kg
Impact Strength 71 cm
Shearing Strength 139 kg/cm2
Stiffness 75 1000 kg/cm2
Tangential Shrinkage 9 %
Radial Shrinkage 4 %
Weight 769 624 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10094 psi
Crushing Strength 2068 psi
Hardness 1627 lbs
Impact Strength 28 inches
Shearing Strength 1980 psi
Stiffness 1078 1000 psi
Specific Gravity 0.68
Weight 48 39. lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 9 %
Volumetric Shrinkage 13 %

The timber is described as exceptional in most strength properties, and is noted for its hardness, toughness, resiliency, and abrasion resistance.

Boone, R.S., C.J. Kozlik, P.J. Bois and E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Woods: Temperate and Tropical. United States Department of Agriculture, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.Canadian Forestry Service. 1981.Canadian Woods - Their Properties and Uses. Third Edition. E.J. Mullins and T.S. McKnight, Editors. Published by University of Toronto Press, Toronto, CanadaConstantine, 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 YorkLittle, 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.
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