Balau

PHYSICAL PROPERTIES

 

Specific gravity:

0.91 (0.60 - 1.16) g/cm3

Strength class

I – II

Shrinkage to oven-dry condition

4.5 % ( R ) and 8.3 % ( T )

Fibre Saturation Point

23%

 

 

MECHANICAL PROPERTIES

 

Bending strength

150 mPa

Modulus of elasticity

22940 mPa

Crushing strength

85 mPa

Note: at 12% moisture content

 

 

 

DURABILITY AND TREATABILITY  
Durability Fungi - Class 2 – Durable

Dry Wood Borers - Heartwood durable

Termites - Class D - Durable
Treatability Balau wood is difficult to treat.
   
DRYING

2.5 cm and 4 cm thick Balau boards are kiln dried from 50% to 15% in respectively 6 and 9 days in a drying temperature of 43 degrees Centigrade to 71 degrees Centigrade and a relative humidity of 84% to 38%. Balau wood is difficult to dry as it easily splits, checks, and deforms.

   
Air Seasoning  
Kiln Drying  
   
WORKING PROPERTIES

Despite its hardness, Balau is not so difficult to work, e.g., with hardened tipped saws or it can be planed smoothly with small cutting angle. Holes should be drilled before nailing to prevent splitting.

   
USES Due to its high strength and durability,- Balau wood is used for heavy construction under roof as well as in the open, such as bridges, railway sleepers, electric poles, flooring, marine construction, boat building, vehicular bodywork and housing.
   

Photos Reference