Petaling


INTRODUCTION

The Standard Malaysian Name as well as the ASEAN Standard Name for the timber of Ochanostachys amentacea (Olacaceae). Vernacular names applied include degong (Kelantan), petikal (Sarawak), sentikal (Sarawak), tanggal (Sabah) and tangkal (Sabah). This genus has only one species, viz. O. amentacea. The sapwood is dark yellow-brown or light red-brown and is moderately defined from the heartwood, which is red-brown to purple red-brown, darkening on exposure.

Also known as Amin, Ampalang, Empilung, Lembasung, Petaling, Petikal, Pilung, Satan bagiuk, Tilokot and Tumbung asu (Indonesia).


DENSITY

The timber is hard to very hard and heavy to very heavy with a density of 800-1,105 kg/m3 air dry. The timber is classified under Medium Hardwood in Malaysia.


NATURAL DURABILITY

The timber is moderately durable under exposed conditions.


TEXTURE

Texture is fine and even with interlocked grain.


STRENGTH PROPERTIES

The timber falls into Strength Group B (Burgess, 1958) or SG3 (MS 544:Part 2:2001).


MACHINING PROPERTIES

It is easy to saw and work and produces a smooth planed surface.


NAILING PROPERTY

The nailing property is rated as poor.


AIR DRYING

The timber seasons very slowly with very slight defects. The sapwood is moderately prone to attacks by insects and slight cupping, bowing, end-checking and surface-checking have been noted during drying. 13 mm thick boards take 6 months to air dry, while 38 mm thick boards take 9 months.


SHRINKAGE

Shrinkage is high, with radial shrinkage averaging 1.9% and tangential shrinkage averaging 3.8%.


USES

The timber is suitable for piling, heavy and medium construction under cover, tool handles (impact), heavy duty furniture, railway sleepers, telegraphic and power transmission posts and cross arms, flooring, pallets, packing boxes and crates, columns (light duty), staircase (carriage, newel, riser, sprandrel framing, stringer, tread, bullnose, round end and winder), joinery and cabinet making.


REFERENCES

  1. Burgess, H. J. 1958. Strength Grouping of Malaysian Timbers. Malayan Forest Service Trade Leaflet No.25. The Malaysian Timber Industry Board and Forest Research Institute Malaysia, Kuala Lumpur. 15 pp.
  2. 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 Insitute Malaysia, Kuala Lumpur. 48 pp.
  3. MS 544: Part 2: 2001: Code Of Practice For Structural Use Of Timber. Permissible Stress Design of Solid Timber.
  4. 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.