Keruntum


INTRODUCTION

The Standard Malaysian Name for the timber of Combretocarpus rotundatus (Anisophylleaceae). Vernacular names applied include kayu tom (Sarawak), mutun (Sarawak), perapat paya (Sabah and Sarawak), perapat perapat (Sabah) and sabutun (Sarawak). This is a monotypic timber. The sapwood is chalky white in colour and sharply defined from the heartwood, which is red or red-brown.

Also known as Keruntum (Brunei) and Perepat darat (Indonesia).


DENSITY

The timber is moderately hard and moderately heavy with a density of 640-800 kg/m3 air dry. It is classified under Medium Hardwood in Malaysia.


NATURAL DURABILITY

The timber is moderately durable. 


PRESERVATIVE TREATMENT

The timber is amenable to preservative treatment.


TEXTURE

Texture is coarse and uneven, due to the presence of broad rays which produce an oak-like silver figure.


STRENGTH PROPERTIES

The timber falls into SG 4 (MS 544:Part 2:2001).


MACHINING PROPERTIES

The timber is easy to saw and work.


NAILING PROPERTY

The nailing property is rated as poor.


AIR DRYING

The timber seasons rather slowly without serious degrade. 13 mm thick boards take 3 months to air dry, while 38 mm thick boards take 6 months.


SHRINKAGE

Shrinkage is high, with radial shrinkage averaging 2.2% while tangential shrinkage averages 3.6%.


USES

The timber is suitable for furniture, flooring, panelling, mouldings, partitioning and plywood. When treated, the timber can be used for heavy construction and railway sleepers.


REFERENCES

  1. Menon, P. K. B. 1986. Uses of Some Malaysian Timbers. Revised by Lim, S. C. Timber Trade Leaflet No. 31. The Malaysian Timber Industry Board and Forest Research Institute Malaysia, Kuala Lumpur. 48 pp.
  2. MS 544:Part 2:2001. Code of Practice for the Structural Use of Timber: Permissible Stress Design of Solid Timber.
  3. Wong, T. M. 1982. A Dictionary of Malaysian Timbers. Revised by Lim, S. C. & Chung, R. C. K. Malayan Forest Records No. 30. Forest Research Institute Malaysia, Kuala Lumpur. 201 pp.