Citation
Helmer T ., . Wood density and elastomechanical properties of Macaranga gigantifolia and M. Hypoleuca from Sabah Malaysia. pp. 62-67. ISSN 1394-2204
Abstract
Macaranga trees are common pioneers in logged-over forests of Southeast Asia. Currently the timber of Macaranga has no commercial importance and its properties are not well known. As the available quantity of macaranga is large and major commercial timber resources are decreasing an evaluation of the commercial potential of Macaranga is urgently needed. As part of this evaluation the wood density and elastomechanical properties of M. gigantifolia and M. hypoleuca were analysed. Wood density values of M. gigantifolia and M. hypoleuca were low (mean 0.28 and 0.26 g per cubic cm respectively). Accordingly both species showed low mean values for elastomechanical properties: modulus of elasticity 6700 and 5600 N mm minus 2; modulus of rupture 50 and 43 N mm minus 2; compression strength 27 and 23 N mm minus 2; shear strength radial 6.4 and 5.6 N mm minus 2; tangential 6.7 and 5.7 N mm minus 2; Janka hardness radial 1.28 and 1.08 kN tangential 1.19 and 0.99 kN. variation between positions within a stem and between individual stems occured but was small with respect to the timber use.
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Abstract
Macaranga trees are common pioneers in logged-over forests of Southeast Asia. Currently the timber of Macaranga has no commercial importance and its properties are not well known. As the available quantity of macaranga is large and major commercial timber resources are decreasing an evaluation of the commercial potential of Macaranga is urgently needed. As part of this evaluation the wood density and elastomechanical properties of M. gigantifolia and M. hypoleuca were analysed. Wood density values of M. gigantifolia and M. hypoleuca were low (mean 0.28 and 0.26 g per cubic cm respectively). Accordingly both species showed low mean values for elastomechanical properties: modulus of elasticity 6700 and 5600 N mm minus 2; modulus of rupture 50 and 43 N mm minus 2; compression strength 27 and 23 N mm minus 2; shear strength radial 6.4 and 5.6 N mm minus 2; tangential 6.7 and 5.7 N mm minus 2; Janka hardness radial 1.28 and 1.08 kN tangential 1.19 and 0.99 kN. variation between positions within a stem and between individual stems occured but was small with respect to the timber use.
Additional Metadata
| Item Type: | Article |
|---|---|
| Additional Information: | Summaries (En Ms) |
| AGROVOC Term: | EUPHORBIACEAE |
| AGROVOC Term: | TIMBER TREES |
| AGROVOC Term: | DENSITY |
| AGROVOC Term: | WOOD |
| AGROVOC Term: | CHEMICOPHYSICAL PROPERTIES |
| AGROVOC Term: | FORESTS |
| AGROVOC Term: | SABAH EUPHORBIACEAE |
| AGROVOC Term: | ARBOLES MADERABLES |
| AGROVOC Term: | DENSIDAD |
| AGROVOC Term: | MADERA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:52 |
| URI: | http://webagris.upm.edu.my/id/eprint/17899 |
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