Appearance of Shining Gum Timber
True to its name, Shining Gum timber has a pale straw-colored heartwood with pink and yellow undertones, giving it a bright, polished appearance. The texture is moderately coarse, with a straight grain, and growth rings are prominent. While the sapwood is not always easy to distinguish, the timber often contains pin-hole borer marks and pencil streaks, adding a speckled character that is increasingly appreciated in furniture making.
Common Applications of Shining Gum Timber
Shining Gum is versatile, used in general construction for joinery, framing, flooring, and paneling. Its pale color allows it to be interchanged with Mountain Ash in applications where a light tone is desired. In furniture making, its natural markings and color variations add charm and uniqueness. The wood is also a good pulping species, though slightly lower density than other gums limits its pulp yield.
Durability of Shining Gum Timber
With a Class 4 durability rating, Shining Gum is not recommended for outdoor or in-ground use. Its heartwood is vulnerable to termites, and the sapwood is susceptible to Lyctid borer, making it better suited to interior, decorative, and non-structural uses.
Workability of Shining Gum Timber
Shining Gum is relatively easy to work with hand and machine tools, with a moderate hardness of 5.8 kN when dry. However, drying requires care, as the timber is prone to surface checking and cell collapse. Reconditioning is often necessary, and careful storage is advised to maintain quality. Shining Gum responds well to machining, bonding, and finishing, making it a reliable choice for high-quality interior projects.
Origin and Availability of Shining Gum Timber
Kosny Timber sources Shining Gum from commercial plantations and native forests in New South Wales and Victoria, ensuring a consistent supply for construction and furniture applications. Its popularity as a plantation timber makes Shining Gum readily available for a range of uses in these regions.
Very Low | Low | Medium | High | Very High | |
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Tangential : | 9.40% | ||||
Radial : | 4.90% | ||||
Unit Movement Tangential: | 0.33% | ||||
Unit Movement Radial: | 0.22% |
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: | F14 | F11 | F8 | F7 | F5 |
Seasoned: | F22 | F17 | F14 | F11 | F8 |
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: | 62 MPa |
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Modulus of Rupture - Seasoned: | 99 MPa |
Modulus of Elasticity - Unseasoned: | 10 GPa |
Modulus of Elasticity - Seasoned: | 13 GPa |
Maximum Crushing Strength - Unseasoned: | 31 MPa |
Maximum Crushing Strength - Seasoned: | 58 MPa |
Impact - Unseasoned: | 15 J |
Impact - Seasoned: | 16 J |
Toughness - Unseasoned: | Medium - 15 - 24 Nm |
Toughness - Seasoned: | Medium - 15 - 24 Nm |
Hardness - Unseasoned: | 4.8 |
Hardness - Seasoned: | 5.8 |
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 |
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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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Critical Radiance Flux - Higher: | >2.2 and <4.5 |
Smoke Development Rate: | <750 |
1 - non-combustible | 2 - reasonably non-combustible | 3 - slightly combustible | 4 - combustible | |
Fire Properties Group |
Average Specific Extinction Area: | <250 |
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Bushfire Resistance: | BAL 12.5 and 19 – Door and window joinery only |