Products : Keruing Timber

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Description

INTRODUCTION

This Medium Hardwood is also known as Dipterocarpus spp. (Dipterocarpaceae). The heartwood is red-brown to purple-red and darkens on exposure. The surface of the timber may be rather resinous and sticky when handled. Keruings that are believed to give the best yield of oleo-resin.

Also known as Keruing (Brunei); Khlong and Thbaeng (Cambodia); Gurjan (India); Keruing, Kerup, Lagan and Tempudau (Indonesia); Mai nyang, Mai kung, Mai sat, Muak and Nha:ng (Laos); Eng, In, Kanyin and Kayin (Myanmar); Apitong and Panau (Philippines); Hora (Sri Lanka); and Heng, Hiang , Hieng, Plung, Yang, Yang-khon, Yang-na and Yang-pai (Thailand).

USES

This timber is suitable for heavy construction, posts, beams, joists, rafters, ship and boat building (keels, keelsons and framework), vehicle bodies (framework, floor boards and planking), container flooring and when treated, suitable for railway sleepers, harbour works, bridges, power-line poles and telegraph poles.

SHRINKAGE

The shrinkage of the timber is summarised below:

Species

Shrinkage (%) (Green to air dry)

Remarks

Radial

Tangential

D. baudii

2.3

5.6

Very high shrinkage
D. cornutus

3.1

5.1

Very high shrinkage
D. costulatus

2.9

3.3

High shrinkage
D. crinitus

2.1

3.5

High shrinkage
D. grandiflorus

1.6

4

High shrinkage
D. kerrii

2.6

6.6

Very high shrinkage
D. kunstleri

2.6

5.4

Very high shrinkage
D. lowii

2.7

4.5

Very high shrinkage
D. sublamellatus

2

5.5

Very high shrinkage
D. verrucosus

3.1

7.4

Very high shrinkage

STRENGTH PROPERTIES

The timber falls into Strength Group B (Engku, 1988b) or SG 5 (MS 544:Part 2:2001).

Sizes

  • Thicknesses of 25mm, 50mm
  • Widths of 50mm, 75mm, 100mm
  • Lengths of 3-6ft & 8ft and up

Characteristics

Density

  • Medium Hardwood
  • 690-945 kg/m3 air dry

Durability

  • Moderate