Clicking
any heading in the main data area (at right) will scroll the page back
to this top position.
Use the following links to
jump to the associated section in the main data.
Blunting Effect
Boring
Carving
Comments
Common Names
Common Uses
Countries of Distribution
Cutting Resistance
Distribution Overview
Drying Defects
Ease of Drying
Environmental Profile
Family Name
Gluing
Grain
Heartwood Color
Kiln Drying Rate
Luster
Mortising
Moulding
Movement in Service
Nailing
Natural Durability
Numerical Data
Odor
Painting
Planing
Polishing
Product Sources
References
Regions of Distribution
Resistance to Impregnation
Response to Hand Tools
Routing & Recessing
Sanding
Sapwood Color
Scientific Name
Screwing
Silica Content
Staining
Steam Bending
Strength Properties
Texture
Trade Name
Tree Size
Turning
Varnishing
Veneering Qualities
| |
Common Names
Akok, Bisslongo, Biteki, Bonzale, Kanda, Mfimbo, Nkonengu, Pogo
Regions of Distribution
Africa
Countries of Distribution
[VIEW MAP]
Cameroon, Gabon, Ivory Coast, Tanzania, Zaire
Common Uses
Chairs, Chests, Concealed parts (Furniture), Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Hatracks, Joinery, Kitchen cabinets, Living-room suites, Office furniture, Parquet flooring, Plain veneer, Plywood, Radio - stereo - TV cabinets, Rustic furniture, Stools, Sub-flooring, Tables , Utility furniture, Veneer, Wardrobes
Environmental Profile
| Abundant/Secure |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Very little threat to its natural environment. |
|
|
|
|
|
|
|
|
|
|
|
|
| Generally secure within its natural habitat |
|
|
|
|
|
|
|
|
|
|
|
|
| Data source is World Conservation Monitoring Center |
|
|
|
|
|
|
|
|
|
|
|
|
Distribution Overview
West and Central Africa.
Heartwood Color
| Brown |
|
|
|
|
|
|
|
|
|
|
|
|
| Red |
|
|
|
|
|
|
|
|
|
|
|
|
| Purple |
|
|
|
|
|
|
|
|
|
|
|
|
| Pink |
|
|
|
|
|
|
|
|
|
|
|
|
| Black |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| From pink brown to greenish brown |
|
|
|
|
|
|
|
|
|
|
|
|
Sapwood Color
| White |
|
|
|
|
|
|
|
|
|
|
|
|
| Yellow |
|
|
|
|
|
|
|
|
|
|
|
|
| Pink |
|
|
|
|
|
|
|
|
|
|
|
|
| Green/Grey |
|
|
|
|
|
|
|
|
|
|
|
|
| Brown |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Color not distinct from heartwood |
|
|
|
|
|
|
|
|
|
|
|
|
Grain
Texture
| Coarse |
|
|
|
|
|
|
|
|
|
|
|
|
| Medium |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Fine to medium |
|
|
|
|
|
|
|
|
|
|
|
|
Luster
Natural Durability
| Resistant to termites |
|
|
|
|
|
|
|
|
|
|
|
|
| Susceptible to insect attack |
|
|
|
|
|
|
|
|
|
|
|
|
| Moderately durable |
|
|
|
|
|
|
|
|
|
|
|
|
| Non-resistant to powder post beetles |
|
|
|
|
|
|
|
|
|
|
|
|
| Very durable |
|
|
|
|
|
|
|
|
|
|
|
|
| Durable |
|
|
|
|
|
|
|
|
|
|
|
|
| Non-resistant to marine borers |
|
|
|
|
|
|
|
|
|
|
|
|
| Resistant to marine borers |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Resistant to lyctus attack |
|
|
|
|
|
|
|
|
|
|
|
|
| Resistant to decay |
|
|
|
|
|
|
|
|
|
|
|
|
Odor
Silica Content
| Likely to have significant impact on machining |
|
|
|
|
|
|
|
|
|
|
|
|
| Contains silica |
|
|
|
|
|
|
|
|
|
|
|
|
Drying Defects
| Resin Exudation |
|
|
|
|
|
|
|
|
|
|
|
|
| Splitting |
|
|
|
|
|
|
|
|
|
|
|
|
| Distortion |
|
|
|
|
|
|
|
|
|
|
|
|
| Discoloration |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Slight tendency to check |
|
|
|
|
|
|
|
|
|
|
|
|
| High tendency to distort |
|
|
|
|
|
|
|
|
|
|
|
|
Ease of Drying
| Slowly |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| Reconditioning Treatement |
|
|
|
|
|
|
|
|
|
|
|
|
| Little degrade |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Dries slowly |
|
|
|
|
|
|
|
|
|
|
|
|
| Difficult |
|
|
|
|
|
|
|
|
|
|
|
|
Kiln Drying Rate
Tree Size
| Tree height is 30-40 m |
|
|
|
|
|
|
|
|
|
|
|
|
| Tree height is 20-30 m |
|
|
|
|
|
|
|
|
|
|
|
|
| Bole length is 10-20 m |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is 10-15 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is 15-20 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Trunk diameter is 100-150 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is greater than 25 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is 5-10 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is 0-5 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Bole length is 0-10 m |
|
|
|
|
|
|
|
|
|
|
|
|
| Tree height is 40-50 m |
|
|
|
|
|
|
|
|
|
|
|
|
| Sapwood width is 20-25 cm |
|
|
|
|
|
|
|
|
|
|
|
|
| Trunk diameter is 150-200 cm |
|
|
|
|
|
|
|
|
|
|
|
|
Product Sources
The tree is seldom harvested for timber because it is highly valued for its flowers and fruits.
Comments
Represented under a general description
Blunting Effect
| Moderate |
|
|
|
|
|
|
|
|
|
|
|
|
| High to severe |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Tungsten tipped cutters may be needed to process wood |
|
|
|
|
|
|
|
|
|
|
|
|
| Blunting effect on sawing dry wood is severe |
|
|
|
|
|
|
|
|
|
|
|
|
Boring
Carving
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
Cutting Resistance
| Easy to saw |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Difficult to Very Difficult to saw |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Easy to saw |
|
|
|
|
|
|
|
|
|
|
|
|
| Dulling effect tends to be moderate |
|
|
|
|
|
|
|
|
|
|
|
|
Gluing
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Good properties |
|
|
|
|
|
|
|
|
|
|
|
|
Mortising
Moulding
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
Movement in Service
| Fair to Good Stability - Medium Movement |
|
|
|
|
|
|
|
|
|
|
|
|
Nailing
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| Pre-Boring Recommended |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Holds nails well |
|
|
|
|
|
|
|
|
|
|
|
|
Planing
| Poor to Very Poor Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Difficult to Very Difficult |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Requires specially tipped cutters |
|
|
|
|
|
|
|
|
|
|
|
|
| Good planing properties |
|
|
|
|
|
|
|
|
|
|
|
|
Resistance to Impregnation
| Resistant heartwood |
|
|
|
|
|
|
|
|
|
|
|
|
| Permeable sapwood |
|
|
|
|
|
|
|
|
|
|
|
|
| Resistant sapwood |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Sapwood reponds well to preservation treatment |
|
|
|
|
|
|
|
|
|
|
|
|
| Heartwood responds poorly to preservation treatment |
|
|
|
|
|
|
|
|
|
|
|
|
Response to Hand Tools
| Easy to Work |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Difficult to Difficult to Work |
|
|
|
|
|
|
|
|
|
|
|
|
Routing & Recessing
Sanding
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Good sanding finish |
|
|
|
|
|
|
|
|
|
|
|
|
Screwing
Turning
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Requires specially tipped cutters |
|
|
|
|
|
|
|
|
|
|
|
|
| Easy to turn |
|
|
|
|
|
|
|
|
|
|
|
|
Veneering Qualities
| Suitable for slicing |
|
|
|
|
|
|
|
|
|
|
|
|
| Suitable for peeling |
|
|
|
|
|
|
|
|
|
|
|
|
Steam Bending
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
Painting
Polishing
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| | | | | | | | | | | | |
| Good results |
|
|
|
|
|
|
|
|
|
|
|
|
Staining
| Fair to Good Results |
|
|
|
|
|
|
|
|
|
|
|
|
| Fairly Easy to Very Easy |
|
|
|
|
|
|
|
|
|
|
|
|
Varnishing
Strength Properties
| Max. crushing strength = high |
|
|
|
|
|
|
|
|
|
|
|
|
| Density = high |
|
|
|
|
|
|
|
|
|
|
|
|
| Compression strength (parallel to grain) = high |
|
|
|
|
|
|
|
|
|
|
|
|
| Bending strength (MOR) = high |
|
|
|
|
|
|
|
|
|
|
|
|
Wood is much stronger than Teak in the air-dry condition (about 12 percent moisture content)
Numerical Data
| Item | Green | Dry | English |
| | | |
| Bending Strength | | 18522 | psi |
| Density | | 43 | lbs/ft3 |
| Maximum Crushing Strength | | 7272 | psi |
| Stiffness | | 1509 | 1000 psi |
| Weight | | 59 | lbs/ft3 |
| Radial Shrinkage | 4 | | % |
| Tangential Shrinkage | 8 | | % |
| | | |
| Item | Green | Dry | Metric |
| | | |
| Bending Strength | | 1302 | kg/cm2 |
| Density | | 689 | kg/m3 |
| Maximum Crushing Strength | | 511 | kg/cm2 |
| Stiffness | | 106 | 1000 kg/cm2 |
| Weight | | 945 | kg/m3 |
| Radial Shrinkage | 4 | | % |
References
Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research
ITTO. 1986. Tropical Timber Atlas, Volume 1 - Africa. International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.
WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.
|
|