Perapat

INTRODUCTION

The common Malaysian name for the timber of Sonneratia spp. (Sonneratiaceae). Vernacular names applied include berembang (Peninsular Malaysia), gedabu (Peninsular Malaysia), pedada (Sabah) and perapat laut (Sabah). Major species include S. alba, S. caseolaris and S. ovata. The sapwood is grey and not sharply defined from the heartwood in S. alba but is light coloured and clearly defined in S. caseolaris. The heartwood is pale grey in S. alba and light brown to dark chocolate in S. caseolaris.

Also known as Keora and Orch (India); Perepat laut (Indonesia); Red brown mangrove (Papua New Guinea); Pagatpat (Philippines); and Lam phaen (Thailand).


DENSITY

The timber is moderately hard to hard and moderately heavy to heavy with a density of 530-690 kg/m3 air dry.


NATURAL DURABILITY

The timber is moderately durable.


TEXTURE

Texture is fine and even, with straight to slightly interlocked grain.


STRENGTH PROPERTIES

The timber is reported to be fairly strong and falls into Strength Group C (Burgess, 1958).


MACHINING PROPERTIES

It is reputed to work easily and takes a beautiful finish.


SHRINKAGE

Shrinkage is rather low, with radial shrinkage averaging 0.8% and tangential shrinkage averaging 1.6%.


USES

The timber is suitable as a general utility timber. It can be used for planking, flooring, furniture, wooden sandals and possibly as a source of pulp.


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. 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.