Pasak

INTRODUCTION

The Standard Malaysian Name for the timber of Aglaia sect. Aglaia species (Meliaceae). Vernacular names applied include kalambiao (Sabah), koping-koping (Sabah), langsat-langsat (Sabah), lantupak (Sabah), lantupak jambu (Sabah), memberas (Peninsular Malaysia) and segera (Sarawak). Major species include A. argentea, A. elliptica, A. exstipulata, A. grandis, A. hiernii, A. odoratissima, A. palembanica and A. tomentosa. The sapwood is pale yellow-brown, light straw-coloured or light pink-brown and is moderately to sharply differentiated from the heartwood, which is light red, orange-red or red-brown and becoming dark red-brown or walnut-brown on exposure.

Also known as Beng kheou (Cambodia); Aglaia (India); Badjudjang, Bajur, Belunjan, Bunjau, Kuping, Langsat lutung, Lasa dontri, Maripu, Medensat, Mempujangan, Merabakan and Takul gunung (Indonesia); Tagat-thitto (Myanmar); Gisihan, Ilo-ilo, Kuling-manuk, Malasaging, Malatumbaga and Tukang-kalau (Philippines); Sangkhriat-klong (Thailand); and Goi tia (Vietnam).


DENSITY

The timber is hard and heavy to very heavy with a density of 770-995 kg/m3 air dry.


NATURAL DURABILITY

The timber is rated as moderately durable to durable when in contact with the ground or when exposed to the weather.


PRESERVATIVE TREATMENT

The heartwood is very difficult to treat with preservatives.


TEXTURE

Texture is fine to moderately fine or moderately coarse and even. Grain is straight to interlocked, sometimes irregular or wavy.


MACHINING PROPERTIES

The timber works well and can be sawn and machined easily except the heavier species which require more power in sawing.


NAILING PROPERTY

Nailing property of some species is reported to be excellent.


AIR DRYING

The timber usually dries well without much degrade except for some slight collapse and twisting. Some species are reported to season fairly rapidly, with only slight cupping, bowing, end-checking and insect attacks as the main sources of degrade. 13 mm thick boards take 1.5 months to air dry, while 38 mm thick boards take 3.5 months.


SHRINKAGE

Shrinkage is rather high and averages 2.4% in both radial and tangential directions.


USES

The timber should be suitable for furniture, flooring, cabinet making, panelling, mouldings, plywood and ornamental items. The heavier woods have also been used for general construction such as beams, joists, rafters, boat building, agriculture implements and tool handles.


REFERENCE

  1. 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.