Minyak berok |
The timber is hard to very hard and heavy to very heavy with a density of 595-960 kg/m3 air dry. The timber is classified under medium hardwood in Malaysia. The sapwood is not differentiated from the heartwood, which is white to bright yellow when fresh and darkens to a strong orange-yellow. Texture is moderately coarse to coarse and uneven. Grain is straight, sometimes wavy. The timber is strong (Strenght group B). It is easy to saw and works well and the planed surface is moderately smooth. The nailing property is rated as good.The timber seasons moderately slowly with only slight defects like cupping, bowing and end-checking. The timber is, however, subject to insect attacks during seasoning. 13 mm boards require 4 months to air dry, while 38 mm boards take 5 months. Shrinkage is very high, especially in the tangential direction. Radial shrinkage averages 2.6% while tangential shrinkage averages 4.9%. The timber is non-durable under exposed conditions and is also susceptible to drywood termites.
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