Lakooch (Artocarpus gomeziana)
Family: Moraceae
Common names: Lakooch, Tampang
Distributed in: Burma, India, Indonesia, Malaysia, Thailand (Oceania and S.E. Asia)
Common uses: Boat building (general), Cabinetmaking, Canoes, Furniture, Heavy construction, Light construction, Mine timbers, Musical instruments, Oars, Poles, Railroad ties
Product sources: Pacific madrone has little commercial value for lumber, although it is well suited for many applications including turned work, bowls, novelties and souvenirs. It is available in limited supplies in lumber form on the west coast of the United States. The burl of the tree, which is very popular for furniture work and marquetry, is scarce and very expensive when available.Pacific madrone is the most plentiful hardwood in the Siskoyou Mountains and interior coast ranges of the Southwest subregion of Oregon. It is also the second most abundant hardwood in northern California, and is common in the Puget Sound and Olympic subregion in the state of Washington.
Tree size: Tree height is 20-30 m
Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStraight
Natural durability: Very durable, Very durable
Ease of Drying: Fairly Easy
Cutting Resistance: Fairly Difficult to Very Difficult to saw
Response to hand tools: Fairly Difficult to Difficult to Work
Polishing: Poor to Very Poor;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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|
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Density |
|
641 |
kg/m3 |
Bending Strength |
429 |
674 |
kg/cm2 |
Crushing Strength |
275 |
449 |
kg/cm2 |
Hardness |
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kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
|
kg/cm2 |
Stiffness |
71 |
84 |
1000 kg/cm2 |
Tangential Shrinkage |
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|
% |
Radial Shrinkage |
|
|
% |
Weight |
|
|
kg/m3 |
Maximum Load |
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|
cm-kg/cm3 |
Toughness |
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cm-kg |
Static Bending |
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kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 6111 | 9589 | psi | Density | | 40 | lbs/ft3 | Maximum Crushing Strength | 3916 | 6397 | psi | Stiffness | 1017 | 1199 | 1000 psi | Weight | 39 | 31 | lbs/ft3 | |
Modulus of Elasticity (stiffness) = very low Max. crushing strength = medium Bending strength (MOR) = low Density (dry weight) = 38-45 lbs/cu. ft.
Desch, H.E.,1954,Manual of Malayan Timbers (2 vols,Malayan Forest Records,no.15Nazma,1981,A handbook of Kerala Timbers,Kerala Forest Research Institute Research Report, No.9Pearson, R.S., Brown, H.P.,1932,Commercial Timbers of India,Govt. Printer Calcutta,2 volsTewari, M.C., Jain, J.C.,1980,Utilization of Secondary Species,Journal of the National Building Organization 25(2) pp1-6
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