Keruing

Other Common names: Burma (In, Kayin), India (Eng, Gurjun, Hollong), Philippines (Apitong), Sarawak (Keruing), Thailand (Pluang, Yang, Heng, Hieng)

Weight: 801 kgs. per cu. metre

General Description: Sapwood is well defined and grey-brown in colour. The heartwood is red-brown or purple-red, weathering to a dark red-brown. Surface dull and often tacky. Grain almost straight: texture moderately coarse and even. It has a faint resinous odour. Resin exudation may occur in inadequately seasoned wood of some species.

Principal Uses: Heavy construction, posts, beams, joists, rafters, staircase stringers, wharf and bridge decking, keels and framework of boats, framework of carriages and wagons, wagon flooring, truck body work, fence posts, flooring etc. It is one of the preferred timbers in England for gymnasium equipment. Treated with preservatives preferably with creosote, it is an excellent wood for salt water piling, harbour works, bridges, railway sleepers, telegraph poles and power-line poles. Abundant supply is one of the best features of this wood.

KILN-DRYING

Kiln Schedule D is recommended for kiln-drying. Care must be taken as this timber is prone to end-splitting and surface-checking.

Kiln Schedule D

 Moisture Content (%)

Temperature (Dry Bulb)

Temperature (Wet Bulb)

Relative Humidity (%) (approx.)

° F

° C

° F

° C

Green

105

40.5

101

38.0

85

60

105

40.5

99

37.0

80

40

105

40.5

96

35.5

70

35

110

43.5

97

36.0

60

30

115

46.0

97

36.0

50

25

125

51.5

101

38.0

40

20

140

60.0

105

40.5

30

15

150

65.5

112

44.5

30

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