Pelajau


INTRODUCTION

The Standard Malaysian Name, which is of Sabah origin, for the timber of Pentaspadon spp. (Anacardiaceae). The ASEAN Standard Name, which is of Indonesian origin, is PELAJU. Vernacular names applied include emplangau (Sarawak), kedondong kijau (Peninsular Malaysia), lakacho (Sarawak), pelong (Peninsular Malaysia) with various epithets, umit (Sarawak) and uping (Sarawak). Major species include P.motleyi and P. velutinus. The sapwood is white with a green tinge or light yellow with a pink tinge and is not clearly defined from the heartwood, which is light yellow-green, sometimes with a pink tinge and darkens to grey-green on exposure.

Also known as Pelaju (Indonesia); and Oei-nam and Toei-na (Thailand).


DENSITY

The timber is fairly hard and fairly heavy with a density of 480-835 kg/m3 air dry. The timber is classified under Light Hardwood in Malaysia.


NATURAL DURABILITY

The timber is moderately durable under exposed conditions.


TEXTURE

Texture is rather fine and even, with shallowly interlocked grain.


STRENGTH PROPERTIES

The timber falls into Strength Group D (Burgess, 1958) or SG7 (MS 544:Part 2:2001).


MACHINING PROPERTIES

It is easy to resaw and cross-cut. Planing is also easy and the planed surface is smooth.


NAILING PROPERTY

The nailing property is rated as poor.


AIR DRYING

The timber seasons fairly slowly, with very minor defects. Slight cupping, bowing and staining have been noted during drying. 13 mm thick boards take approximately 3 months to air dry, while 38 mm thick boards take approximately 4.5 months.


SHRINKAGE

Shrinkage is rather high, with radial shrinkage averaging 2% and tangential shrinkage averaging 3.4%.


USES

The timber is suitable for interior finishing, panelling, partitioning, mouldings, joinery, cabinet making, skirtings, flooring, plywood, furniture, staircase (apron lining, baluster, balustrade, carriage, riser, stringer, tread, bullnose, round end and winder) and other planking works.


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 Record No. 30. Forest Research Institute Malaysia Kuala Lumpur. 201 pp.