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Ekebergia
Ekebergia (Ekebergia rueppelliana)

Family: Meliaceae

Common names: Aradwi, Arariet, Araruet, Bumet, Croyuet, Ekebergia, Ekerbgia, Keribut, Kipumetet, Kondilwa, Lol, Manuka-masi, Mbo, Mongk-ho, Mongko, Monko, Mpotowandovu-mkuu, Mrongoleh, Msisi, Mufumba, Mukongo, Mukongu, Mukuriaungu, Mununga, Musimba, Ol mokuna, Omonyamavi, Ororuet, Rararuet, Teldet, Tewiwa, Ul-subukiai

Distributed in: Ethiopia, Kenya, Tanzania, Uganda (Africa)

Distribution overview: Widely distributed in montane forests of East Africa (Tanzania and Uganda), also found in open grasslands and the coastal savanna belt.

Common uses: Boat building (general), Boxes and crates, Broom handles, Brush backs & handles, Brush backs & handles, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Food containers, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles: general, Hatracks, Joinery, Kitchen cabinets, Light construction, Living-room suites, Matches, Office furniture, Paneling, Plain veneer, Plywood, Pulp/Paper products, Radio - stereo - TV cabinets, Rustic furniture, Sporting Goods, Stools, Structural plywood, Tables , Toys, Turnery, Utility furniture, Utility plywood, Vats, Veneer, Veneer: decorative, Wardrobes

Environment profile: Generally secure within its natural habitat

Tree size: Boles are short, heavily fluted, crooked, and seldom more than 30 feet (9 m) in length.

Colors: the heart isWhite to cream, Whitishand the sapwoodColor not distinct from heartwood .The grain isWavy, the textureMedium to coarseand the lusterMedium

Natural durability: Susceptible to marine borer attack, Susceptible to pinhole borer

LightInduced Color Change: Darker

Kiln Schedules: Kiln Drying Rate (in days) is fairly rapid

Kiln Drying Rate: Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)

Drying Defects: Slight end splitting, Slight surface checking

Ease of Drying: Radial and tangential shrinkage from 4-7%

Tree Identification: Bole/stem form is misshapen

Comments: General finishing qualities are rated as good

Blunting Effect: Little

Boring: Easy

Cutting Resistance: Low resistance

Mortising: Finishes well

Moulding: Satisfactory moulding

Movement in Service: Satisfactory moulding

Nailing: Holds nails well, Tends to split during nailing

Planing: Planes well, to a good finish

Resistance to Impregnation: Sapwood is permeable

Resistance to Splitting: Satisfactory

Response to hand tools: Easy to machine

Sanding: Yields smooth, clean surfaces

Screwing: Screwing yields good results ; Turning: Yields smooth, clean surface.

Polishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,46
Density 624 kg/m3
Bending Strength 401 601 kg/cm2
Crushing Strength 150 281 kg/cm2
Hardness 451 kg
Impact Strength cm
Shearing Strength 85 kg/cm2
Stiffness 71 84 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 608 480 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 5711 8554 psi
Density 39 lbs/ft3
Hardness 995 lbs
Maximum Crushing Strength 2139 3998 psi
Shearing Strength 1221 psi
Stiffness 1017 1199 1000 psi
Specific Gravity 0.46
Weight 38 30 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 6 %

Density (dry weight) = 38-45 lbs/cu. ft. 0
Density (dry weight) = 31-37 lbs/cu. ft. 1
Max. crushing strength = low 0
Bending strength (MOR) = low
Shrinkage, Radial = very small
Hardness (side grain) = soft
Shrinkage, Tangential = moderate
Density (dry weight) = 53-60 lbs/cu. ft
Density (dry weight) = 46-52 lbs/cu. ft.
Shrinkage, Tangential = very small
Shrinkage, Tangential = small
Shrinkage, Radial = small
Modulus of Elasticity (stiffness) = very low
Density (dry weight) = 23-30 lbs/cu. ft.
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Bending strength (MOR) = very low

Bois, P.J.,1966,The Strength Properties of Tanzania Timbers,Tanzania Forest Div. Util. Sec. Moshi Tech. Note, No.35Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBryce, J.M., Norcross, H.,1961,The Resistance of Tanganyika Timbers to Impregnation,Tanzania Forest Dept. Util. Sec .Tech. Note,No.28Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Dale, 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.23Tack, C.H.,1958,The Strength Properties of some Uganda Timbers,Uganda Forest Department Bulletin No. 5Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Tanzania Forest Department,1960,The Natural Durability of Local Timbers,Tanzanian Forest Dept. Tech. Note,No.14Tanzania Forest Department,1961,The Movement of Timbers Technical Note No.29,Tanzania Forest Department, Utilisation Division Technical NoteTanzania Forest Division,1966,Kiln Drying Schedules for Tanzania Timbers Technical Note no.38,Tanzania Forest Div. Util. Sec. MoshiTanzania Forest Division,1967,The Weights and Shrinkage of some Local Timbers,Tanzania Forest Div. Util. Sect. Technical Note,No.25Tanzania Forestry Department,1962,Timbers of Tanganyika - Ekebergia rueppelliana,Tanzania Forestry Department, Utilisation Section, Moshi - Timbers of,TanganyikaWimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
*Come interpretare i dati (manleva su eventuali imprecisioni)