Timbers of Kerala

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Scientific Name  Artocarpus heterophyllus Lamk.
Trade Name  Jack,Kathal
Local Name  Plavu
Family  Moraceae
Tree Size  Medium to large
Tree Height ( m )  18 - 25
Tree Diameter ( cm )  120
Tree Distribution  Tropical evergreen forests;widely cultivated
Sapwood-Heartwood Distinction  Distinct
Sapwood Colour  Greyish or pale yellow
Heartwood Colour  Yellow to yellowish brown
Hardness  Moderately hard
Specific Gravity Based on Weight Over-dry and Volume Green  0.65
Weight  Moderately heavy
Weight(Kg)/cubic meter at 12% Moisture Content  585
Texture  Coarse to medium textured
Grain  Straight to interlocked grained
Growth Rings  Indistinct
Porosity  Diffuse porous
Vessel Size  Large to medium sized
Vessel Arrangement  Solitary and in radial multiples of two to three
Vessel Diameter   160 - 270 220
Vessel Element Lenght  300 - 530 530
Perforation  Simple
Pit Outline  Circular
Pit Size  Large(9 -15 Ám),non-vestured
Vessel Ray Pitting  Alternate and pit outline circular
Ray Nature  Moderately broad to fine,few and widely spaced
Ray Arrangement/Type  3-5 seriate,heterogeneous type-2. Body made up of procumbent cells with 1or 2 marginal rows of square cells
Ray Number  3 - 4
Ray Height  370 - 890 610
Fibre Walls  Thin,non-septate
Fiber Length 
Modulus of Rupture in kg/cm2 (Green)  633
Modulus of Elasticity in kg/cm2 (Green)  82300
Modulus of Rupture kg/cm2 (Dry)  806
Modulus of Elasticity in kg/cm2 (Dry)  100700
Uses  Plywood and veneers, brushware, furniture and cabinets, blockboards and tool handles, musical instruments, mathematical, engineering and drawing instruments, lorry and bus bodies, carving and turnery, dyes, boxes and packing cases.
  • Tree Image
  • Timber Gross View
  • TS (100X)
  • TLS(100X)
  • RLS(100X)


College of Forestry - KAU