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Southern gidgee

Acacia pruinocarpa

Southern gidgee is a large spreading tree with height up to 12 m. It has rough, dark brown bark and often has fissures that fold into the wood, giving it a gnarled appearance. Distribution includes the central and northern desert areas of Western Australia, in a 700 km strip eastwards from east of Carnarvon to the north-eastern Goldfields. and is prominent in summer rainfall areas in the Murchison, Goldfields and Gascoyne. It is often associated with mulga on loamy soils.

Wood description [more info]
Heartwood is dark brown, and sapwood whitish.

Wood density [more info]
Green density is about 1265 kg/m3, air-dry density about 1150 kg/m3, and basic density about 970 kg/m3.

Shrinkage [more info]
Tangential and radial shrinkage are about 2.9 and 2.3 per cent respectively.

Workability [more info]
Goldfields craftsmen rank southern gidgee as average for machinability and stability, and good for turning, boring, screwholding, sanding and finishing.

Durability [more info]
Timber is presumably CSIRO Durability Class 1.

Strength group and properties [more info]
Green and dry strength groups are (S2) and (SD2). The brackets indicate conservative provisional ratings based on the air-dry density. The more important strength properties based on the strength groups are given in the table below.

Property

Units

Green

Dry

Modulus of Rupture

MPa

86

130

Modulus of Elasticity

MPa

14200

18500

Max Crushing Strength

MPa

43

70

Hardness

KN

-

-

Uses [more info]
The timber has considerable potential for craftwork.

Availability [more info]
Limited availability because of the scattered nature of the resource.

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