Meranti Bakau


INTRODUCTION

The Standard Malaysian Name for the timber of Shorea uliginosa (Dipterocarpaceae). Vernacular names applied include meranti paya (Peninsular Malaysia, in error), meranti tenggelam (Perak) and seraya buaya hantu (Sabah). There is only one species contributing to this timber, viz. Shorea uliginosa, although sometimes a timber derived from the true meranti paya (Shorea platycarpa) cannot be confidently separated from meranti bakau. The sapwood is lighter in colour and is distinct from the heartwood, which is light pink to light red-brown.  

Also known as Meranti merah (Indonesia).


DENSITY

The timber is a Light Hardwood with a density of 595-755 kg/m3 air dry.


NATURAL DURABILITY

The timber is moderately durable under exposed conditions.


PRESERVATIVE TREATMENT

It is rather difficult to treat with preservatives.


TEXTURE

Texture is rather coarse but even, with interlocked grain.


STRENGTH PROPERTIES

The timber falls into Strength Group C (Engku, 1988b) or SG 4 (MS 544:Part 2:2001).


MACHINING PROPERTIES

It is easy to work and produces a moderately smooth surface.


NAILING PROPERTY

The nailing property is rated as good.


AIR DRYING

The timber seasons fairly rapidly with moderate cupping, bowing and twisting as the main sources of degrade. 13 mm thick boards take approximately 2 months to air dry, while 38 mm thick boards take 3.5 months.


KILN-DRYING

Kiln Schedule H is recommended. The timber kiln-dries fast without any degrade. 


Kiln Schedule H

Moisture Content (%)

Temperature
(Dry Bulb)

Temperature
(Wet Bulb)

Relative Humidity (%)

F

C

F

C

Green

135

57.0

127

53.0

80

50

135

57.0

126

52.0

75

40

140

60.0

126

52.0

65

30

150

65.5

129

54.0

55

20

170

76.5

136

58.0

40


SHRINKAGE

Shrinkage is average, with radial shrinkage averaging 1.0% and tangential shrinkage averaging 2.7%.


USES

The timber is suitable for general light construction, posts, beams, joists, rafters, furniture, door and window frames and sills, flooring, plywood, pallets (expendable type), joinery and cabinet making.


REFERENCES

  1. Engku Abdul Rahman Chik. 1998b. Basic and Grade Stresses for Strength Groups of Malaysian Timbers. Malayan Forest Service Trade Leaflet No. 38. The Malaysian Timber Industry Board and Forest Research Institute Malaysia, Kuala Lumpur. 13 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 Institute Malaysia, Kuala Lumpur. 48 pp.
  3. MS 544:Part 2:2001. Code of Practice for the 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.