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Balau (Shorea spp)

DISTRIBUTION

The species is widely distributed throughout Indonesia, Malaysia, and the Philippines.

The resource is substantial, but a logging ban is already in effect in the Philippines, Malaysia has partial bans on the export of timber, and Indonesia imposes substantial taxes on the exporters of unprocessed timber.

QUALITY STANDARDS AND GENERAL PROPERTIES

The timber is graded to Select grade only, and this grade excludes sapwood.

The species is deemed to be a heavy hardwood. It machines well but the grain has a tendency to splinter, hence making it unsuitable for applications such as decking.

TYPICAL END USE APPLICATIONS

Truck decking, railway sleepers, telegraph poles, bridge and wharf construction, and other heavy industrial end uses.

TECHNICAL DATA

Density

At 12% mc

880 - 980kg/m3

Yellow Balau Decking

Shrinkage

Tangential

6.5% - 8.0%

(Green to 12% mc)

Radial

4.0% - 5.0%

Durablity

Heartwood

Very durable

 

Sapwood

Non durable

Stability

Green

Stable

 

At 12% mc

Very stable

LOG DESCRIPTION WOOD DESCRIPTION

Diameter:

from 70 to   90 cm

Colour:

Yellow brown

Thickness of sapwood:

from 2   to    8 cm

Sapwood:

Not clearly demarcated

Floats:

no

Texture:

Medium

Durability in forest:

Good

Grain

Straight or interlocked

 

Interlocked grain

Slight

Note:

Yellow brown to reddish brown more or less dark. White resin canals. Sawnwoods may present black holes. This defect is acceptable if it remains limited and not frequent.

PHYSICAL PROPERTIES MECHANICAL PROPERTIES
Physical and mechanical properties are based on mature heartwood specimens.
These properties can very greatly depending on origin and growth conditions.
mean      standard deviation mean       standard deviation

Density*:

0.91g/cm3

 

Monnin hardness*:

7.3

Crushing strength*:

Static bending strength*:

Modulus of elasticity*:

       85 MPa

     150 MPa

  22940 NPa

Coef of volumetric shrinkage:

0.68 %

Total tangential shrinkage:

9.5 %

Total radial shrinkage:

4.2 %

Fibre saturation point:

23 %

Stability:

Moderately stable

(* : at 12% moisture content : 1MPa=1N/mm2

AVAILABILITY

Most sizes are readily available, and will continue to be so, with our ability to compete for supply internationally determining the volumes that we can source.

Yellow Balau

 

Yellow Balau

     

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