Kidongadwa (Rapanea rhododendroides)
Family: Myrsinaceae
Common names: Kidongadwa, Kirjasi, Kititet, Kwarabariet, Mraso, Mshinwizo, Mugaita, Mugeta, Mumangombe, Mungala, Musongonyonye, Muthitha, Mwaja, Ol angabova, Sitoto, Sitotuet
Distributed in: Kenya, Tanzania, Uganda (Africa)
Distribution overview: The genus Rapanea consists of a large number of species, and is distributed in tropical America, Africa, and Asia. R. melanophloeos occurs in Cameroon and in the mountains of central, eastern and southern Africa. In South Africa, the species occurs from the Cape through all the forest districts of the Transvaal
Common uses: Agricultural implements, Cabinetmaking, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Paneling, Plywood, Railroad ties, Tool handles, Toys, Turnery, Veneer
Tree size: Tree height is 10-20 m
Colors: the heart isWhite to cream, Yellowand the sapwoodColor not distinct from heartwood, White.The grain isStraight, the textureFineand the lusterPronounced
Natural durability: Perishable, Susceptible to attack from powder post (Lyctid & Bostrychid) beetles
Drying Defects: Moderate end spitting, Moderate twist/warp
Ease of Drying: Reconditioning Treatement
Tree Identification: Bole/stem form is straight
Blunting Effect: Little
Boring: Poor to very poor results
Carving: Poor to Very Poor Results
Cutting Resistance: Easy to saw
Gluing: Easy to glue
Mortising: Poor to Very Poor
Moulding: Poor to Very Poor
Movement in Service: Poor to Very Poor
Nailing: Difficult to nail
Planing: Poor to Very Poor
Routing recessing: Poor to Very Poor Results
Sanding: Fairly Difficult to Very Difficult
Turning: Poor to Very Poor Results
Polishing: Good;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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Density |
|
849 |
kg/m3 |
Bending Strength |
654 |
1024 |
kg/cm2 |
Crushing Strength |
380 |
574 |
kg/cm2 |
Hardness |
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kg |
Impact Strength |
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cm |
Shearing Strength |
|
139 |
kg/cm2 |
Stiffness |
117 |
135 |
1000 kg/cm2 |
Tangential Shrinkage |
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% |
Radial Shrinkage |
5 |
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% |
Weight |
833 |
673 |
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 | 9310 | 14566 | psi | Density | | 53 | lbs/ft3 | Maximum Crushing Strength | 5408 | 8171 | psi | Shearing Strength | | 1989 | psi | Stiffness | 1665 | 1923 | 1000 psi | Weight | 52 | 42 | lbs/ft3 | Radial Shrinkage | 5 | | % | Tangential Shrinkage | 8 | | % | |
Density (dry weight) = 53-60 lbs/cu. ft Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = medium Max. crushing strength = medium Max. crushing strength = high Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = medium Shrinkage, Tangential = moderate Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = moderate Shrinkage, Radial = large Shrinkage, Radial = fairly large Shearing strength (parallel to grain) = low
Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchDale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards LondonEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaMurira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.Patterson, D.N.,1963,The strength of Kenya timbers, their derivation and application,Kenya Forestry Department Research Bulletin,No.23Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
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