Timber Species: Sydney Blue Gum (Eucalyptus saligna)

Physical Properties of Sydney Blue Gum

Dry Density:  850 kg/m³

Janka Hardness: 9 kN

These properties are only a guide, as timber is a natural product there will be variations within any species. The Janka Dry Hardness rating measures the hardness of the wood. The higher the number the harder the wood.

Sydney Blue Gum Species Description

A large flowering hardwood that stretches from Queensland to the New South Wales seaboard, the Sydney blue gum can grow as tall as 65 meters high and with a trunk diameter of between 2 and 2.5 meters. Straight-trunked with either smooth grey or white bark above a rougher-barked brownish base, Sydney blue gum trees bloom from December through February in bunches of seven to eleven distinctive white flowers.

Sydney Blue Gum

Sydney Blue Gum is an Australian Hardwood Species used in Engineered Timber Flooring

Usually restricted to around 120 kms of the coastline, the Sydney blue gum fits an important ecological niche in addition to its utility as a building and construction timber. Its seeds are a delicacy to birds such as the Crimson Rosella, Koala enjoy the taste of its leaves, and the grey-headed flying fox can be seen eating the flowers during blooming seasons. However, an aggressive bird species known as the bell miner also enjoys the Sydney blue gum, and ecologists are currently investigating the impetus behind what they’ve termed bell miner-related canopy dieback.

As a timber, Sydney blue gum is relatively hard and dense without being difficult to work with thanks to its Janka rating of 9 and its dry density of 850 kg/m³. Its rich dark honey-coloured wood and straight, interlocked grain makes it perfect for solid timber flooring, engineered wood, and parquetry, but less suited for outdoor decking. It’s a favourite of furniture builders and boat builders and features heavily in paneling and general building construction thanks to its versatility and red-hued beauty, which features variations of soft, dark pinks and reddish browns.

 

Australian Hardwood Timber Species | Tallowwood

 Technical Properties Sydney Blue Gum

Species Name

Sydney Blue Gum

Botanical Name

Eucalyptus saligna

Colour Range

Red/Brown

Janka (Hardness) Rating – Dry

9

Natural Durability Class

In-ground contact
Outside above ground contact

3

2

Density (kg/m³)

Unseasoned (Green)
Seasoned (Dry)

1100

850

Strength Group

Unseasoned (Green)
Seasoned (Dry)

S3

SD3

Joint Group

Unseasoned (Green)
Seasoned (Dry)

J2

JD2

Fire Indices

Spread-of-Flame Index
Smoke-Developed Index
Critical Radiant Flux
Smoke Development Rate
Group Number
Naturally bushfire-resisting Timber

>2.2 to <4.5

<750

3

UNKNOWN

Tangential Shrinkage %

9.5

Toughness (Nm)

Naturally Unseasoned (Green)
Seasoned (Dried)

16

 23

Naturally Termite Resistant to AS3660

NON RESISTANT

Naturally Lyctus Susceptible

 SUSCEPTIBLE

 

 

Summary
Sydney Blue Gum. Hardwood Species Specification Data
Article Name
Sydney Blue Gum. Hardwood Species Specification Data
Description
Timber Species: Sydney Blue Gum (Eucalyptus saligna) Physical Properties of Sydney Blue Gum. Dry Density: 850 kg/m³. Janka Hardness: 9 kN. A large flowering hardwood that stretches from Queensland to the New South Wales seaboard, the Sydney blue gum can grow as tall as 65 meters high with a trunk diameter of 2.5m
Author
Publisher Name
Better Timber Flooring
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