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Lunga
Lunga (Polyscias ferruginea)

Family: Araliaceae

Common names: Lunga, Monge, Mujugantara, Mungu, Mutengambiya, Mwadzi, Parasol tree

Distributed in: Benin, Cameroon, Congo, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Sudan, Togo, Zimbabwe (Africa)

Common uses: Boxes and crates, Joinery

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isWhite, White to creamand the sapwoodRed, White.The grain isWeak figure, the textureUniform

Natural durability: Sapwood is susceptible to wood staining fungal attack, Susceptible to attack from termites (Isoptera)

Kiln Schedules: Dry at a slow speed

Drying Defects: Splitting, Uneven Moisture Content

Ease of Drying: Rapidly

Tree Identification: Bole/stem form is straight

Blunting Effect: Little

Boring: Fairly difficult to very difficult

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Very Good to Excellent Results

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Fairly Easy to Very Easy, Holds nails well

Planing: Easy to plane

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to machine

Routing recessing: Fairly Difficult to Very Difficult

Steam bending: Unsuitable

Screwing: Fair to Good Results, Fairly Easy to Very Easy; Turning: Fairly Difficult to Very Difficult

Painting: Satisfactory; Polishing: Fairly Easy to Very Easy; Staining: Surface Preparation; Varnishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density kg/m3
Bending Strength 429 674 kg/cm2
Crushing Strength 150 275 kg/cm2
Hardness 144 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 6111 9589 psi
Hardness 319 lbs
Maximum Crushing Strength 2139 3916 psi
Stiffness 1017 1199 1000 psi

Max. crushing strength = low
Bending strength (MOR) = low
Modulus of Elasticity (stiffness) = very low
Hardness (side grain) = very soft

Eggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaFouarge, J.,1970,Essais Physiques,Mecaniques et de Durabilite de Bois de la Republique,Democratique du Congo,I.N.E.A.C. Belgium Serie Technique,No.76Goldsmith, B., Carter, D.T.,1981,The Indigenous Timbers of Zimbabwe,Forestry Commission, Zimbabwe Research Bulletin No.9Irvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanMurira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7
*Come interpretare i dati (manleva su eventuali imprecisioni)