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Bilinga (Nauclea diderrichii)
Overview
Bilinga (also called Aloma in Germany and Opepe in England) is an African wood, from Nauclea diderrichii trees in the family Rubiaceae.
The wood, which grows across tropical Africa from Sierra Leone to Uganda, has about the same density as true hickory, but is not quite as strong. The wood is extremely heavy. Log diameter is from 60 to 90 centimetres (24 to 35 in). The heartwood is golden yellow to orange yellow, and slightly shimmering. The sapwood has an interlocking grain.
In temperate climates, the wood is very durable against fungi, and durable against dry wood borers and termites. It is suitable for use in a marine environment.[ Bilinga may be used for railway sleepers, poles, hydraulic works, bridges and ship planking and flooring. It may also be used for heavy industrial flooring. The wood may also be used for veneer and cabinet work.
| Species | Bilinga (*Nauclea diderrichii) |
| Origin | Africa |
| Grade | AIC |
| Thickness | 18mm to 300mm |
| Width | 40mm to 300mm |
Length | 4m to 8m |
| Drying | KD, AD |
Description & Distribution
The tropical tree Bilinga is a large tree of the forests of West and Central Africa. It is between 30 and 40 m high, with a diameter up to 1.20 m. The bole is cylindrical, generally slender, very straight, without buttresses. It sometimes has small bases. It is covered with a grey-brown scaly bark, sometimes turning to orange-yellow, often cracked.
The tropical tree Bilinga grows in a wide distribution area from Sierra Leone in the north to Angola in the south and Uganda in the east.
Physical Characteristics
Crushing Strength: 63 MPa (+/- 7)
Specific Gravity (at 12% MC): 0.76g/cm3 (+/- 0.07)
Stability : Moderately stable to stable
Static bending strength: 95MPa ( +/- 11)
Durability & resistance
Dry Wood Borers : Class D - Durable
Fungi: Class 1 - Very durable
Termites: Class D - Durable
Treatability: Class 2 - Moderately permeable
Treatability：Class 3 - Poorly permeable
Typical Applications
● Sleepers
● Poles
● Hydraulic works (seawater)
● Industrial or heavy flooring
● Cabinetwork (high class furniture)
● Sliced veneer
● Exterior panelling
● Interior panelling
● Resistant to one or several acids
● Heavy carpentry
● Bridges (Parts in contact with water or ground)
● Vehicle or container flooring
● Flooring
● Current furniture or furniture components
● Ship building (planking and deck)
● Interior joinery
● Bridges (Parts not in contact with water or ground)
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