Wood specie: Keruing
Botanical name: Dipterocarpus spp
Growth area: South East Asia |
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Botanical name:
Dipterocarpus spp
Growth area:
South East Asia
Quality:
Standard & Better
Colour of heartwood:
The wood species of the keruing
group have colours ranging from grey brown to light and deep red brown to
brown.
Colour of sapwood:
Greyish white to grey brown
Mass density:
(580-)740- 870(-1020) kg/m³ at 12%
humidity, fresh 1000-1,050 kg/m³ Due to the large number of Dipterocarpus
species that keruing supplies, the mass density and properties vary widely.
Grain:
Straight, sometimes shallow cross-grain.
Warping:
Either dried on the air or kiln-dried,
keruing is difficult to dry with extensive shrinking. Additionally, in
particular flat-cut timber and wood that is not straight-grained, the wood
tends towards warping.
Bio-substances:
The wood contains gritty substances
and may contain resins.
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Mould and insects:
Mould 3v. Termites G
Durability grade:
3
Gluing:
Medium, depending on the quantity of
bio-substances.
Machining:
When processing the wood, the humidity
rate, the resin content and the grit content of the wood (usually less than
0.5%) play a major role. If the wood has a high resin content, it will make the
tools stick. Additionally, the tools will be blunted by the gritty particles.
When applying keruing for purposes that require low tolerance in dimensions,
the wood must be properly dried before use.
Dekker range:
Garden wood articles without soil
contact (due to durability grade).
General applications:
Beams, stiles and planks for heavy
construction works, such as bridges, platforms, port constructions, workshop
floors, train floors, parquet and brick-bond wood strip floor, dust thresholds,
pallets, ship hatches and grand stands. Keruing trunks with a low mass density
are peeled for manufacturing plywood board.
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