Oregon White Oak (Quercus garryana)

Oregon White Oak (Quercus garryana)

Information provided by Wood Database

Common Name(s): Oregon White Oak

Scientific Name: Quercus garryana

Distribution: Pacific Northwestern United States

Tree Size: 65-85 ft (20-25 m) tall, 3-4 ft (1-1.2 m) trunk diameter

Average Dried Weight: 51 lbs/ft3 (815 kg/m3)

Specific Gravity (Basic, 12% MC): .64, .81

Janka Hardness: 1,640 lbf (7,310 N)

Modulus of Rupture: 10,200 lbf/in2 (70.3 MPa)

Elastic Modulus: 1,090,000 lbf/in2 (7.51 GPa)

Crushing Strength: 7,320 lbf/in2 (50.5 MPa)

Shrinkage: Radial: 4.2%, Tangential: 9.0%, Volumetric: 13.2%, T/R Ratio: 2.1

Color/Appearance: Has a light to medium brown color, though there can be a fair amount of variation in color. Conversely, Red Oak tends to be slightly redder, but is by no means a reliable method of determining the type of oak.

Grain/Texture: Has medium-to-large pores and a fairly coarse grain.

Rot Resistance: Good rot resistance: frequently used in boatbuilding applications.

Oak grade description***

Clear grade - This is the best grade of hardwood flooring because there are few color variations, board lengths are not widely varied, and there are little to no visible knots or pinholes.

Select and better - This grade is slightly lower than the clear, still presenting uniform color and little to no knots and pinholes.

#1 common - This grade presents with more color variation, shorter board length with greater length variation, with an increased chance of visible knots and pinholes.

#2 common - Boards show natural character, with darker and lighter boards, shorter board length, with an increase in visible knots and pinholes.

Cabin grade - Cabin grade is for those who are looking for a rough-hewn look in hardwood flooring; allowed checking, unfilled knot holes and worm holes, no splits, no loose knotholes.
Cribbing grade - Cribbing grade is used for blocking up large heavy things such as machinery or buildings. This grade may have many visual defects and is only graded on its ability to hold weight. Wane, checks, and cracks are common and usually do not change the integrity of the wood.

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