The TreeThe trees grow to a very large size, up to 60m in height, and a diameter of up of 2.4m with straight and cylindrical boles often 27m long.
The TimberThe sapwood and heartwood are not differentiated by colour. The wood is creamy-white when first cut turning a pale straw colour after exposure. The planed wood is lustrous or very lustrous, without any figure, but slit-like radial passages may be seen on tangential surfaces as lens-shaped bodies. These are latex traces, and are commonly found in rows or clusters, often about 1 .Om apart. The latex passages are commonly from 3mm to about 5mm wide, and about 12mm in length, and represent a natural defect which makes it difficult to use the timber in long lengths and wide widths where appearance is a primary consideration. They are, however, easily eliminated during conversion into smaller dimensions. The grain is usually straight, and the texture is fine and even. The wood is moderately soft, and moderately light, weighing about 470 kg/m3 when dried.
DryingRelatively easy to dry, but difficulty may be experienced in extracting moisture from the centre of thick stock before staining occurs. There is little tendency for the wood to warp or split.
StrengthA soft, weak and rather brittle timber.
Working QualitiesGood - An easy timber to work with both hand and machine tools. It can be finished to a very smooth surface, takes stains, polish and varnish very well, and nails, screws and glues satisfactorily.
Latin NameDyera costulata
Also known asjelutong bukit (Sarawak), jelutong paya
OriginMalaysia, Sumatra, Kalimantan