Timbers of Kerala

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Scientific Name  Intsia palembanica Miq. & Intsia bijuga (Colebr.)
Trade Name  Merbau
Local Name  Koyla, Merbau
Family  Leguminosae
Tree Size  Large
Tree Height ( m )  15 - 21
Tree Diameter ( cm )  150
Tree Distribution  South East Asia and islands of South West Pacific
Sapwood-Heartwood Distinction  Distinct
Sapwood Colour  Pale yellow
Heartwood Colour  Yellowish to orange brown, when freshy cut, darkening to brown on exposure.
Hardness  Moderately hard to hard
Specific Gravity Based on Weight Over-dry and Volume Green  0.68
Weight  Moderately heavy
Weight(Kg)/cubic meter at 12% Moisture Content  2230
Texture  Medium coarse textured
Grain  Interlocked or sometime wavy grain
Growth Rings  Distinct
Porosity  Diffuse porous
Vessel Size  Vessels solitary and in radial multiples of two to three
Vessel Arrangement  solitary and in radial multiples of two to three, vessel outline circular.
Vessel Diameter   130 - 260 180
Vessel Element Lenght  280 - 420 420
Perforation  Simple
Pit Outline  Polygonal
Pit Size  Medium (8-10 Ám),vestured.
Vessel Ray Pitting  Alternate and pit rounded in shape and vestured
Ray Nature  fine and numerous, closely spaced
Ray Arrangement/Type  Two to three seriate, homogeneous.
Ray Number  4 - 6
Ray Height  200 - 460 300
Fibre Walls  Thin to thick walled,non-septate with minutely bordered pits on both radial and tangential walls.
Fiber Length 
Modulus of Rupture in kg/cm2 (Green) 
Modulus of Elasticity in kg/cm2 (Green) 
Modulus of Rupture kg/cm2 (Dry) 
Modulus of Elasticity in kg/cm2 (Dry) 
Uses  Structural works, paneling, high- class joinery and furniture and constructional purposes.
  • Tree Image
  • Timber Gross View
  • TS (100X)
  • TLS(100X)
  • RLS(100X)

College of Forestry - KAU