Sydney Blue Gum (Eucalyptus Saligna)

Sydney Blue Gum is an Australian native hardwood timber that is widely used in general construction and for flooring, furniture and joinery.

Sydney Blue Gum is a large hardwood species growing to a height of 60 metres or more. It occurs natively in forests along the coast of New South Wales and southern Queensland. Sydney Blue Gum is also extensively grown as a plantation species in South Africa and South America, where rapid growth yields timber of much lower density than Australian material.

Sydney Blue Gum is an important general construction timber, particularly in New South Wales. It is widely used for flooring, cladding, fencing, paneling and boat building. Other common applications include landscaping (as garden sleepers), furniture and joinery.

The heartwood of the species ranges in colour from dark pink to a reddish brown. Sapwood is distinctly paler. The grain of Sydney Blue Gum timber is typically straight, with occasional interlocking of grain. Texture is moderately coarse and gum veins are common.

Sydney Blue Gum is a moderately durable timber with a life expectancy for in-ground applications of between eight and 15 years. Untreated sapwood is susceptible to Lyctid borer attack.

Sydney Blue Gum timber is easy to dry relative to most other eucalypts. It is also easy to work, dress and fix. It responds well to most finishes and takes a good polish, making it popular for decorative applications where moderate durability is required.

Botanical Name: 
Eucalyptus saligna

Common Name:

Sydney Blue Gum

AKA:

    Blue Gum

Type:

    Hardwood

Appearance

The heartwood of this species ranges in colour from dark pink to reddish brown. The paler sapwood is readily distinguishable. Grain is typically straight with occasional interlocking. Texture is moderately coarse and gum veins are common.

Common Applications

Sydney Blue Gum timber is an important general construction timber, particularly in New South Wales. It is widely used for flooring, cladding, fencing, paneling and boat building. Other common applications include landscaping (as garden sleepers), furniture and joinery.

Common Form

Sawn

Workabiity

Sydney Blue Gum is easy to work, dress and fix. It responds well to most finishes and takes a good polish, making it popular for decorative applications where moderate durability is required.

External Cladding

The natural appeal, versatility and strength of timber makes it the superior choice for external cladding. Through specification, planning, design and finishing processes, timber cladding not only creates a building of superior strength, acoustic and thermal performance but also creates a place of beauty, style and natural appeal.

Fencing

When it comes to fencing, timber is your natural choice. A material that is durable, strong and reliable it compliments almost every outdoor landscape and environment. Clear specification, detailed installation and appropriate maintenance will see any timber fence provide a natural and lasting property boundary and back drop for years to come.

Flooring

Whether for structural or finished flooring applications, timber offers durability, versatility and adaptability. The warmth, strength and natural beauty of timber flooring has proved enduringly popular in a wide variety of interior settings.

Retaining Walls & Landscaping

When it comes to retaining wall, landscape design and construction, timber is the natural choice. A material that is durable, sturdy and reliable, it boasts natural aesthetics that help it blend seamlessly with the outdoors. Careful consideration during the specification and design process will facilitate the creation of a long lasting, durable and eye catching timber retaining wall that will complement its surrounding landscape for years to come.

Timber Joinery Products

Timber joinery products offer a classic, unique and stylish touch to any interior design.

Timber Portal Frames

For buildings that require large spans and column free interiors, timber portal frames provide one of the most aesthetically pleasing solutions. Utilising modern engineering technology, portal frame design transforms timber into a highly effective, efficient and economical structural product. This application guide provides a comprehensive overview of the process of using timber in the specification, fabrication and erection of portal frame structures.

SHRINKAGE

Very Low Low Medium High Very High
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Tangential tooltip
 9.5
Radial tooltip
 >5
Unit Movement tooltip
 .35%

STRENGTH GROUPS

Very High High Reasonably High Medium High Medium Reasonably Low Low Very Low
Uneasoned
S1
S2
S3
S4
S5
S6
S7
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Seasoned
SD1
SD2
S3
SD4
SD5
SD6
SD7
SD8
 tick

STRESS GRADE tooltip

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

DENSITY PER STANDARD tooltip

Unseasoned 1070kg/m3
Seasoned 850kg/m3

JOINT GROUP tooltip

Very High High Reasonably High Medium Low Very Low
Unseasoned
J1
J2
tick
J3
J4
J5
J6
Seasoned
JD1
JD2
tick
JD3
JD4
JD5
JD6

COLOUR tooltip

White, Yellow,Pale Straw to Light Brown Pink to pink brown Light to dark red Brown, chocolate, mottled or streaky
Shade species_colour_bar_sm
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MECHANICAL PROPERTIES

Modulus of Rupture – Unseasoned tooltip
91
Modulus of Rupture – Seasoned tooltip
140
Modulus of Elasticity – Unseasoned tooltip
16
Modulus of Elasticity – Seasoned tooltip
18
Maximum Crushing Strength – Unseasoned tooltip
44
Maximum Crushing Strength – Seasoned
68
Impact – Unseasoned tooltip
16
Impact – Seasoned tooltip
28
Toughness – Unseasoned tooltip
Medium – 15 – 25 Nm
Toughness – Seasoned tooltip
Medium – 15 – 25 Nm
Hardness – Unseasoned tooltip
6.4
Hardness – Seasoned tooltip
9

DURABILITY

Low Moderate Reasonably High High
(0-5 years)
(5-15 years)
(15-25 years)
(> 25 years)
In Ground tooltip  tick
(0-7 years)
(7-15 years)
(15-40 years)
(>40 years)
Above Ground tooltip  tick
(0-20 years, usually <5) (21-40 years) (41-64 years) (>65 years)
Marine Borer Resistance tooltip  tick
Lyctid Borer Susceptibility tooltip
Susceptible
Termite Resistance tooltip
Not Resistant

FIRE PROPERTIES

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
EFH Ignitability tooltip
fire_m
EFH Spread of Flame Index tooltip
1
2
3
4
5
6
7
8
9
10
 fire_arrow
fire_m
EFH Smoke Developed Index tooltip
1
2
3
4
5
6
7
8
9
10
 fire_arrow
fire_m
Critical Radiance Flux – Lower tooltip
>2.2 and <4.5kWm 2
Critical Radiance Flux – Higher tooltip
>2.2 and <4.5kWm 2
Smoke Development Rating tooltip
<750
Fire Properties Group Number tooltip
1 – Non Combustible
2 – reasonably non combustible
3 – slightly combustible
4 – combustible
fire_arrow
fire_m
Average Specific Extinction Area tooltip
<250
Bushfire Resistance tooltip
BAL 12.5, 19 and 29 – All AS3959 required applications