Appearance of American White Oak Timber
The sapwood of American white oak is light in colour, contrasting with the heartwood, which ranges from pale yellow-brown to mid-brown, often with a pinkish tinge. The timber typically features a straight grain, medium to coarse texture, and long rays that create more prominent figures than American red oak. Growth rings are large and distinctive, while some boards may exhibit medullary rays, adding character and visual interest to the wood.
Applications of American White Oak Timber
American white oak's versatility lends itself to a wide variety of applications. In the United States, it is commonly used in structural and exterior projects such as timber bridges, railway sleepers, and boat building. Its impermeability makes it ideal for vats and casks used to store wine and spirits. In Australia, the timber is most often employed in flooring, high-grade furniture, interior joinery, architectural woodwork, and paneling. Its durability and resistance to decay also make it suitable for exterior joinery.
Workability of American White Oak Timber
This hard and heavy wood is relatively easy to work with. It machines well and accepts nails, screws, and glue effectively, although pre-boring is recommended for fasteners. American white oak stains easily and takes a wide variety of finishes, making it ideal for decorative applications. Its good steam-bending properties make it a top choice for curved or intricate designs. However, care must be taken during seasoning to avoid checking, as the wood dries slowly and has a high shrinkage rate, making it susceptible to movement under variable moisture conditions.
Durability of American White Oak Timber
American white oak is strong and resistant to decay, which makes it suitable for outdoor and structural uses. However, the heartwood is susceptible to lyctid borer attack and termite damage, so appropriate treatment is recommended for certain applications.
Origin and Availability of American White Oak Timber
This timber is sourced from native forests across the eastern United States and eastern Canada. In Australia, American white oak is readily available through specialist timber dealers, typically imported in a range of grades and specifications.
American white oak’s combination of durability, workability, and aesthetic appeal has made it a staple in both structural and decorative applications, ensuring its continued popularity in both domestic and commercial projects.
Very Low | Low | Medium | High | Very High | |
---|---|---|---|---|---|
![]() | ![]() | ||||
Tangential : | 6.60% | ||||
Radial : | 3.20% | ||||
Unit Movement Tangential: | 0.37% | ||||
Unit Movement Radial: | 0.18% |
Very High | High | Reasonably High | Medium High | Medium | Reasonably Low | Low | Very Low | |
Unseasoned: | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 |
Seasoned: | SD1 | SD2 | SD3 | SD4 | SD5 | SD6 | SD7 | SD8 |
![]() |
Structural No. 1 | Structural No. 2 | Structural No. 3 | Structural No. 4 | Structural No. 5 | |
Unseasoned: | |||||
Seasoned: | F14 | F11 | F8 | F7 | F5 |
Seasoned: | 750kg/m3 |
---|---|
Unseasoned: | 985kg/m3 |
Very High | High | Reasonably High | Medium | Low | Very Low | |
Unseasoned: | J1 | J2 | J3 | J4 | J5 | J6 |
![]() | ||||||
Seasoned: | JD1 | JD2 | JD3 | JD4 | JD5 | JD6 |
![]() |
White, yellow, pale straw to light brown | Pink to pink brown | Light to dark red | Brown, chocolate, mottled or streaky | |
![]() |
Modulus of Rupture - Unseasoned: | 57 MPa |
---|---|
Modulus of Rupture - Seasoned: | 105 MPa |
Modulus of Elasticity - Unseasoned: | 8.6 GPa |
Modulus of Elasticity - Seasoned: | 12.3 GPa |
Maximum Crushing Strength - Unseasoned: | 25 MPa |
Maximum Crushing Strength - Seasoned: | 51 MPa |
Impact - Unseasoned: | |
Impact - Seasoned: | |
Toughness - Unseasoned: | High - 25 Nm and above |
Toughness - Seasoned: | High - 25 Nm and above |
Hardness - Unseasoned: | 4.7 |
Hardness - Seasoned: | 6 |
Low | Moderate | Reasonably High | High | |
(0 - 5 yrs) | (5 - 15 yrs) | (15 - 25 yrs) | (more than 25 yrs) | |
In-Ground: | ![]() | |||
(0 - 7 yrs) | (7 - 15 yrs) | (15 - 40 yrs) | (More than 40 yrs) | |
Above ground: | ||||
(0 - 20 yrs, usually < 5) | (21 - 40 yrs) | (41 - 64 yrs) | (More than 60 yrs) | |
Marine Borer Resistance: | ![]() |
Lyctid Borer Susceptibility: | Susceptible |
---|---|
Lyctid Borer Susceptibility - Other: | |
Termite Resistance: | Not Resistant |
1 - non-combustible | 2 - reasonably non-combustible | 3 - slightly combustible | 4 - combustible | |
Fire Properties Group |
Average Specific Extinction Area: | <250 |
---|---|
Bushfire Resistance: | BAL 12.5 and 19 - All AS 3959 Required Applications |