Timbers of Kerala

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Scientific Name  Tectona grandis L.f.
Trade Name  Teak
Local Name  Thekku
Family  Verbenaceae
Tree Size  Large to very large
Tree Height ( m )  25 - 45
Tree Diameter ( cm )  190
Tree Distribution  Occurs in India,Burma,Thailand,Indo-china and Java. Also planted in many parts of East and West Africa and West Indies
Sapwood-Heartwood Distinction  Distinct
Sapwood Colour  White or pale yellow
Heartwood Colour  Light golden brown when fresh,turning brown or dark brown on exposure,often with darker streaks
Hardness  Moderately hard
Specific Gravity Based on Weight Over-dry and Volume Green  0.62
Weight  Moderately heavy
Weight(Kg)/cubic meter at 12% Moisture Content  720
Texture  Medium coarse textured
Grain  Straight grain
Growth Rings  Distinct
Porosity  Ring porous
Vessel Size  Earlywood has large to medium sized vessels and latewood has small to medium sized
Vessel Arrangement  Solitary and in radial multiples of two to three
Vessel Diameter   200 - 400 270
Vessel Element Lenght  190 - 680 680
Perforation  Simple
Pit Outline  Circular
Pit Size  Small to medium ( 6-9 Ám),vestured
Vessel Ray Pitting  Alternate and pit outline circular
Ray Nature  Moderately broad , visible to the naked eye and widely spaced
Ray Arrangement/Type  3-4 cells wide, homogeneous, wholly made up of procumbent cells showing a tendency towards heterogeneity with one or two marginal raws of square cells
Ray Number  3 - 4
Ray Height  510 - 930 655
Fibre Walls  Thick walled, septate; simple pits confined to the radial walls
Fiber Length 
Modulus of Rupture in kg/cm2 (Green)  841
Modulus of Elasticity in kg/cm2 (Green)  109700
Modulus of Rupture kg/cm2 (Dry)  959
Modulus of Elasticity in kg/cm2 (Dry)  119600
Uses  Used as a standard for comparison for other timbers. Also for shipbuilding, construction, paneling, interior fittings, railway sleepers, furniture and cabinet making. It is an outstanding timber for joinery. Because of its resistance to chemicals used in industrial chemical plants, beams & rafters, sport goods, ornamental house posts, boards & panels, window & door frames, bridges, piles & posts, handicrafts, joinery & interior fittings, wagons and boxes.
  • Tree Image
  • Timber Gross View
  • TS (100X)
  • TLS(100X)
  • RLS(100X)


College of Forestry - KAU