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Yellow stringybark
in its natural occurrence is commonly a tall tree 25-40 m in height and
up to 1 m diameter ( dbh). On favourable sites, it may be 50 m in
height and 3 m dbh. This species occurs on coastal plains and adjacent
ranges in southeastern Australia from near Wollongong, New South Wales,
in the north to Wilson's Promontory in Victoria. Yellow stringybark typically
occurs in tall open-forest formation. Trial plantings have been established
in south-west Western Australia for use as power poles.
Wood
description [more
info]
Heartwood is a light yellowish brown with a pinkest tinge. Sapwood
is very pale brown, to 2.5 cm thick, and the texture is medium
and even with grain interlocked.
Wood
density [more
info]
Green density is about 1100 kg/m3, air-dry density about 870 kg/m3,
and basic density about 695 kg/m3.
Shrinkage
[more
info]
Tangential and radial shrinkage before reconditioning are 7.5 and
4.3 per cent respectively, and after reconditioning 5.5 and 3.2 per cent
respectively.
Workability
[more
info]
With workability, the timber needs care in
drying to minimise checking and splitting. It is a hard and heavy timber
to work.
Durability
[more
info]
Durability Class based on the 1996 CSIRO assessment
is 3 for decay, and 4 for decay + termites combined.
Strength
group and properties [more
info]
Green and dry strength groups are S3 and SD3 respectively. The more important
strength properties are given in the table below.
|
Property
|
Units
|
Green
|
Dry
|
|
Modulus
of Rupture
|
MPa
|
90
|
132
|
|
Modulus
of Elasticity
|
MPa
|
14000
|
17000
|
|
Max
Crushing Strength
|
MPa
|
44
|
72
|
|
Hardness
|
KN
|
6.3
|
8.5
|
Uses
[more
info]
Use as power poles
was the original objective of planting the species in Western Australia,
but flooring has great potential. Previous uses in the eastern states
include general construction, posts, poles, bridge timber, sleepers and
cross arms.
Availability
[more
info]
The timber is not readily available in Western Australia,
but is common on the south coast of New South Wales.
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