Appearance of Yellow Stringybark Timber
The heartwood of yellow stringybark is yellow to yellowish-brown, contrasting with its distinctly paler sapwood. The grain is medium to fine, predominantly straight but occasionally interlocked, adding visual interest. Gum veins and bug holes are common features, giving the timber a unique character.
Applications of Yellow Stringybark Timber
Historically, yellow stringybark was primarily used in heavy construction, such as piles, poles, bearers, and stumps, as well as for wood chips. Today, it is widely utilised for flooring, decking, and furniture. Its durability and strength make it an excellent choice for outdoor structures like pergolas, steps, and hand railings. When kiln-dried, yellow stringybark can also be used as a reliable structural timber.
Workability of Yellow Stringybark Timber
Yellow stringybark machines and sands well, making it an ideal material for flooring and other smooth finishes. It is unsuitable for steam bending, and pre-drilling is recommended for nailing and screwing due to its density. The timber readily accepts most coatings and stains, with oil-based finishes yielding particularly attractive results. Polyurethane glues are recommended for bonding due to the timber’s natural density.
Durability of Yellow Stringybark Timber
Yellow stringybark is equivalent to fire-retardant treated timber when tested in accordance with AS/NZS 3837. This classification makes it a suitable choice for bushfire-prone areas, with its bushfire rating expected to remain unchanged under updated standards.
Origin and Availability of Yellow Stringybark Timber
Yellow stringybark is primarily found in southern New South Wales and eastern Victoria. It is readily available in these regions, with its applications ranging from residential to industrial uses.
Source of Yellow Stringybark Timber
Yellow stringybark is sustainably harvested from native forests, ensuring a responsible supply for construction, furniture, and other applications. Its balance of durability, workability, and fire-retardant properties makes it a valuable resource in Australia’s timber industry.
Very Low | Low | Medium | High | Very High | |
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Tangential : | 7.50% | ||||
Radial : | 4.30% | ||||
Unit Movement Tangential: | 0.37% | ||||
Unit Movement Radial: | 0.27% |
Very High | High | Reasonably High | Medium High | Medium | Reasonably Low | Low | Very Low | |
Unseasoned: | S1 | S2 | S3 | S4 | S5 | S6 | S7 | S8 |
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Seasoned: | SD1 | SD2 | SD3 | SD4 | SD5 | SD6 | SD7 | SD8 |
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Structural No. 1 | Structural No. 2 | Structural No. 3 | Structural No. 4 | Structural No. 5 | |
Unseasoned: | F17 | F14 | F11 | F8 | F7 |
Seasoned: | F27 | F22 | F17 | F14 | F11 |
Seasoned: | 885kg/m3 |
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Unseasoned: | 1150kg/m3 |
Very High | High | Reasonably High | Medium | Low | Very Low | |
Unseasoned: | J1 | J2 | J3 | J4 | J5 | J6 |
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Seasoned: | JD1 | JD2 | JD3 | JD4 | JD5 | JD6 |
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White, yellow, pale straw to light brown | Pink to pink brown | Light to dark red | Brown, chocolate, mottled or streaky | |
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Modulus of Rupture - Unseasoned: | 86 MPa |
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Modulus of Rupture - Seasoned: | 132 MPa |
Modulus of Elasticity - Unseasoned: | 14 GPa |
Modulus of Elasticity - Seasoned: | 17 GPa |
Maximum Crushing Strength - Unseasoned: | 45 MPa |
Maximum Crushing Strength - Seasoned: | 76 MPa |
Impact - Unseasoned: | 17 J |
Impact - Seasoned: | 15 J |
Toughness - Unseasoned: | Medium - 15 - 24 Nm |
Toughness - Seasoned: | Medium - 15 - 24 Nm |
Hardness - Unseasoned: | 6.7 |
Hardness - Seasoned: | 8.6 |
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: | Not Susceptible |
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Lyctid Borer Susceptibility - Other: | |
Termite Resistance: | Resistant |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
EFH Spread-of-Flame Index: | |||||||||||
EFH Smoke-Developed Index: |
Critical Radiance Flux - Lower: | >2.2 and <4.5 |
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Smoke Development Rate: | <750 |
1 - non-combustible | 2 - reasonably non-combustible | 3 - slightly combustible | 4 - combustible | |
Fire Properties Group |
Group Number - Other: | >2.2 and <4.5 |
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Average Specific Extinction Area: | <250 |
Bushfire Resistance: | BAL 12.5 and 19 – All AS3959 required applications |