Physical properties of Pulai (Alstonia angustiloba) from different height level and near pith, near bark / Siti Aishah Rajab … [et al.]

Wood has an organic that happens causes from process grow thing of tree, that are introduce as primer grow thing and secondary growth thing. Wood tissue that produced has external characteristic (physical properties) and internal characteristic (structure properties) that difference from other characteristic that have on metal like iron, cuprum, aluminums and other. That occurrence has become wood is very unique than metal. Wood growth process consists of primary and secondary growth. From this process, wood tree can become more high and growth from diameter aspect. Wood tissue firmly form have more bigger volume compare with wood bark that source from divided cell moves to pitch that said if more fast from divided cell moves to pitch. Wood area divided to two that are sapwood and heartwood. Sapwood that near with bark is less compact from cell aspect if compare with heartwood that near with pith. This study examined the physical properties from one species of wood is Pulai (Alstonia angustiloba) from height aspect of tree (top, middle and bottom) and from growth ring (near bark and near pitch) of that tree. The physical test is from four ways that are density aspect, moisture content, specific gravity, and also shrinkage and swelling aspect. It is hoped that the values derived from this study can be a beneficial the suitability of wood for various uses.