TRADE NAME

BILINGA

 

SCIENTIFIC NAME

Nauclea diderrichii Merill (= Sarcocephalus trillesii Pierre)

 

FAMILY

Rubiaceae

 

 

REGIONAL DISTRIBUTION

West Africa – Central Africa

Sierra Leone : BUNDUI
Ivory Coast : BADI
Ghana : KUSIA
Nigeria : OPEPE
Cameroon : AKONDOC
Equat. Guinea : ALOMA
Gabon : BILINGA
Congo-Zaire : N’GULU-MAZA
Uganda : KILINGI
Angola : ENGOLO
Great Britain : OPEPE

Pr. = Rather low Ex. = Promotion

 

 

SAPWOOD

Clearly demarcated – whitish to pale yellow – 5 cm.

 

HEARTWOOD

  • Colour : Yellow to orange yellow
  • Grain : Slightly/occasionally interlocked to highly/frequently interlocked
  • Texture : Medium
  • Silver figure :-

 

 

TECHNOLOGICAL PROPERTIES

  • Green weight (kg/m3) = 1000 – 1100
  • Specific gravity at 12% M.C. (kg/m3) MV12 = (heavy) 760
  • Volumetric swelling for 1% MC variation V% (large) 0.55
  • Total tangential swelling T% = 8.0
  • Total radial swelling R% = 4.7
  • Crushing strength (N/mm2) C12 = 62
  • Static bending strength (N/mm2) F12 = 134
  • Modulus of elasticity (N/mm2) E12 = 11800

 

 

END USE

  • Exterior joinery
  • Decorative sliced veneers
  • Flooring
  • House framing
  • Poles
  • Harbour works – boat building
  • Truck and wagon trays
  • Railways sleepers.

 

 

REMARKS

  • Natural durability : Durable
  • Lyctus susceptibility : No
  • Preservative treatment : Moderate
  • Other remarks :
    Resistant to marine borers.
    An AZOBE substitute for some end-uses (sleepers)