The heartwood is light red to red brown or purplish red brown. Presence of resin. Possible wind shakes. It has clearly demarcated sapwood. The grain is straight or interlocked and the texture is coarse. Density at 12 % moisture content: 0.79 g/cm3.
The blunting effect is high; peeling is reported to be good and slicing is not recommended or without interest. Variable silica content. Some species are very resinous and tend to clog tools. Occasional tearing on quartersawn. Nailing is good but pre-boring is necessary. Gluing is correct but must be done with care due to the presence of resin. It dries slowly. Moisture content is very variable especially for the most resinous species. Careful stacking and end coating are recommended.
Keruing is moderately durable to fungi and is durable to dry wood borers; sapwood demarcated (risk limited to sapwood). Several species are regrouped under the name Keruing of the genus Dipterocarpus and the natural durability is variable from one species to another. It is thus recommended to restrict the use without preservative treatment for end-uses under biological hazard class 2.
Keruing can be used for several applications such as:
• interior: e.g. flooring, stairs, panelling, veneer, boxes and crates, joinery
• exterior: e.g. exterior joinery, panelling, ship building, bridges, wood frame house, vehicle or container flooring, heavy carpentry
Plywood for light woods. Resin and shakes may restrict end-uses. In Asia, this species is used for sleepers and poles with a treatment.
• CIRAD Forestry Department
|Origin:||Asia and Oceania|
Gurjun, Keruing, Mai Sat, Keruing Beras, Yang, Hora, Dau, Keroeing, Mai Nhang, Keruing Bajak, Kanyin, Apitong,
Flooring, Vehicle or container flooring, Wood frame house, Interior joinery, Exterior panelling, Ship building (planking and deck), Veneer for back or face of plywood, Stairs (inside), Heavy carpentry, Exterior joinery, Interior panelling, Bridges (Parts not in contact with water or ground), Veneer for interior of plywood, Boxes and crates,
|Commercial restriction:||No commercial restriction|
|IUCN Red List status:|
|Grain:||Straigth or interlocked|
|Typical colour:||Red Brown|
|Crushing strength:||65 (+/- 7) MPa|
|Specific Gravity (at 12% MC):||0,79 (+/- 0,07) |
|Stability:||Moderately stable to poorly stable |
|Static bending strength:||115 (+/- 14) MPa|
|Dry wood borers:||Class D - Durable - sapwood demarcated|
|Fungi:||Class 3 - Moderately durable|
|Termites:||Class S - Susceptible|
|Treatability:||Class 3 - Poorly permeable|
Technical descriptions from the software Tropix 7 , with permission of the Research Unit Biomass, Wood, Energy, Bioproducts , CIRAD .
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