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Blunting Effect
Comments
Common Names
Common Uses
Countries of Distribution
Cutting Resistance
Family Name
Grain
Heartwood Color
Luster
Nailing
Natural Durability
Numerical Data
Planing
Polishing
References
Regions of Distribution
Resistance to Impregnation
Response to Hand Tools
Sapwood Color
Scientific Name
Screwing
Staining
Steam Bending
Strength Properties
Texture
Trade Name
Tree Identification
Tree Size
Veneering Qualities
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Common Names
Chebakwa, Dundu, Kibatwa, Kipsebuet, Mahuhu, Mubohu, Muhaa, Mutundu, Mutundu-tundo, Mutuntuki, Sabaitet, Shawa
Regions of Distribution
Africa
Countries of Distribution
[VIEW MAP]
Congo, Kenya, Mozambique
Common Uses
Boat building (general), Boxes and crates, Cabinetmaking, Carvings, Food containers, Fuelwood, Furniture, Joinery, Light construction, Particleboard, Plywood corestock, Plywood, Pulp/Paper products, Sporting Goods, Toys
Heartwood Color
| Yellow |
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| Red |
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| Brown |
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| Orange |
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| Pink |
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| White to cream |
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| Greenish to greyish |
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Sapwood Color
| Red |
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| Yellow |
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| Same as heartwood |
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Grain
Texture
Luster
Natural Durability
| Durable |
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| Perishable |
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| Susceptible to attack from powder post (Lyctid & Bostrychid) beetles |
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| Non durable |
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| Heartwood is susceptible to wood staining fungal attack |
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| Susceptible to marine borer attack |
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| Susceptible to attack from termites (Isoptera) |
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Tree Identification
| Bole/stem form is straight |
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| Bole/stem form is cylindrical |
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Tree Size
| Tree height is 10-20 m |
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| Tree height is 20-30 m |
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| Tree height is 30-40 m |
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Comments
General finishing qualities are rated as poor
Blunting Effect
| Blunting effect on machining is slight |
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Cutting Resistance
Nailing
| Nails hold poorly |
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| Easy to nail |
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Planing
| Fairly Difficult to Very Difficult |
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| Very Good to Excellent Results |
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| Fair to Good Results |
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| Planes to a poor finish |
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Resistance to Impregnation
| Sapwood is permeable |
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| Heartwood is moderately resistant |
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Response to Hand Tools
| Easy to Work |
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| Easy to machine |
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Screwing
| Poor results |
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| Easy to screw |
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Veneering Qualities
| Good gluing qualities |
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| There is slight to moderate drying degrade and the potential for buckles and splits |
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| Suitable for peeling |
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| No steaming needed during bolt preparation. |
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| Moderately easy to veneer |
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Steam Bending
Polishing
Staining
| Finish is generally satisfactory |
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Strength Properties
| Density (dry weight) = 23-30 lbs/cu. ft. |
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| Shrinkage, Tangential = very small |
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| Shrinkage, Radial = very small |
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| Modulus of Elasticity (stiffness) = very low |
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| Max. crushing strength = low |
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| Density (dry weight) = 15-22 lbs/cu. ft. |
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| Bending strength (MOR) = low |
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| Shrinkage, Tangential = small |
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| Shrinkage, Radial = small |
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| Shearing strength (parallel to grain) = very low |
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| Shearing strength (parallel to grain) = low |
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Numerical Data
| Item | Green | Dry | English |
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| Bending Strength | 6111 | 9589 | psi |
| Density | | 24 | lbs/ft3 |
| Maximum Crushing Strength | 2139 | 3916 | psi |
| Shearing Strength | | 1221 | psi |
| Stiffness | 1017 | 1199 | 1000 psi |
| Weight | 24 | 20 | lbs/ft3 |
| Radial Shrinkage | 2 | | % |
| Tangential Shrinkage | 5 | | % |
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| Item | Green | Dry | Metric |
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| Bending Strength | 429 | 674 | kg/cm2 |
| Density | | 384 | kg/m3 |
| Maximum Crushing Strength | 150 | 275 | kg/cm2 |
| Shearing Strength | | 85 | kg/cm2 |
| Stiffness | 71 | 84 | 1000 kg/cm2 |
| Weight | 384 | 320 | kg/m3 |
| Radial Shrinkage | 2 | | % |
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
Dale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards London
Eggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe Uganda
France - C.T.F.T./C.T.B.,1982,Guide pour le Choix des Essences Deroulables-pour la fabrication du,contreplaque,C.T.F.T./C.T.B. France
Murira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.
Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
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