Mbessi (Trema sp.)
Family: Ulmaceae
Common names: Mbessi, Menarong, Mengkirai
Distributed in: Comoros (Africa)
Distribution overview: The genus Trema consists of about 20 species, which are widely distributed in the tropical regions of the world.
Common uses: Balusters, Baskets, Bedroom suites, Boat building, Boxes and crates, Building construction, Building materials, Cabinetmaking, Canoes, Casks, Chairs, Charcoal, Chests, Concealed parts (Furniture), Construction, Core Stock, Decorative plywood, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Fine furniture, Floor lamps, Food containers, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Hatracks, Interior construction, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Moldings, Office furniture, Packing cases, Particleboard, Plywood, Radio - stereo - TV cabinets, Rustic furniture
Environment profile: Status has not been officially assessed
Tree size: Trunk diameter is 200-250 cm
Colors: the heart isWhite to cream, Yellowand the sapwoodWhite, Yellow.The grain isStraight, the textureMedium coarse to coarseand the lusterMedium
Natural durability: Susceptible to insect attack, Susceptible to termite attack
Odor: Has an odor
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Ring Shakes, Uneven Moisture Content
Ease of Drying: Very good seasoning properties
Comments: Species in the genus are more valuable in their role of soil conservation and reclamation than as a source for timber
Blunting Effect: Medium dulling effect on cutting edges
Boring: Very good to excellent results
Carving: Good results
Cutting Resistance: Fairly easy to saw
Gluing: Very Good to Excellent Results
Mortising: Very Good to Excellent
Moulding: Works fairly well with machine tools
Movement in Service: Works fairly well with machine tools
Nailing: Pre-Boring Recommended, Very Good to Excellent
Planing: Very Good to Excellent
Resistance to Impregnation: Sapwood is permeable
Response to hand tools: Fairly Difficult to Difficult to Work
Routing recessing: Routing is easy
Sanding: Very Good to Excellent Results
Veneering qualities: Veneers easily, Veneers moderately easy
Steam bending: Fair to Good Results
Screwing: Pre-boring recommended, Very Good to Excellent Results; Turning: Very Good to Excellent Results
Painting: Very Good to Excellent; Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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Density |
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kg/m3 |
Bending Strength |
434 |
671 |
kg/cm2 |
Crushing Strength |
217 |
399 |
kg/cm2 |
Hardness |
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kg |
Impact Strength |
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cm |
Shearing Strength |
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103 |
kg/cm2 |
Stiffness |
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|
1000 kg/cm2 |
Tangential Shrinkage |
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% |
Radial Shrinkage |
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% |
Weight |
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kg/m3 |
Maximum Load |
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cm-kg/cm3 |
Toughness |
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cm-kg |
Static Bending |
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kg/cm2 |
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 |  |  |  | Item | Green | Dry | English | Bending Strength | 6174 | 9555 | psi | Maximum Crushing Strength | 3087 | 5684 | psi | Shearing Strength | | 1470 | psi | Stiffness | 1127 | 1294 | 1000 psi | |
Compression strength (parallel to grain) = medium Bending strength (MOR) = medium
It is closer in strength to Mahogany than either Teak or White oak, which have higher bending strength
Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchDesch, H. E. 1954. Manual of Malayan Timbers - Volume II. Malayan Forest Records, No. 15. Malaysia Publishing House Ltd., Singapore.Schneider, E.E. 1916. Commercial Woods of the Philippines: Their Preparation and Uses. Bulletin No. 14. Department of the Interior, Bureau of Forestry, Manila, Philippines.
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