Ubah

INTRODUCTION

The common Malaysian name for the trees and timber of Glochidion spp. (Euphorbiaceae). Vernacular names applied include gerumong jantan (Sabah), obah nasi (Sabah) and saka-saka (Sabah). Major species include G. borneense, G. littorale, G. obscurum, G. perakense and G. superbum. The timber has pale brown sapwood. The sapwood is not differentiated from the heartwood, which is light purple-grey-brown or red-brown.  

Also known as Ki pare and Ki timbel (Indonesia); Bagna and Salanisin (Philippines); Ubah merah (Singapore); and Khrai mot (Thailand).


DENSITY

The timber is moderately hard and moderately heavy with a density of 440-890 kg/m3 air dry.


NATURAL DURABILITY

It is non-durable to moderately durable. 


PRESERVATIVE TREATMENT

The timber is resistant to preservative treatment.


TEXTURE

Texture is moderately fine and even, with straight grain.


SHRINKAGE

Shrinkage upon seasoning is moderate to very high, especially in the tangential direction.


USES

The timber of ubah is used to build native and temporary houses, mainly as poles and rafters and for tool handles. In New Guinea, it is used for light framing, flooring, mouldings, interior trim and furniture. The trees yield a good fuelwood and the boles have been used in mushroom cultivation.


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.