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Akasinsa
Akasinsa (Celtis africana)

Family: Ulmaceae

Common names: Akasinsa, Akasisa, Camdeboo, Camdeboo stinkwood, Celtis, Chekeleliliet, Chepkelelet, Gusotono, Huguru, Kamutuna, Kerrua, Kirundu, Lusa, Maset, Mastet, Mastitet, Mosididet, Mrinde, Mrunde, Msussu, Mugara, Muguru, Mukonachando, Mukyemogola, Murima, Murundu, Musvutaderere, Muzhunzhu, Mwessu, Mweye, Mweyu, Nyabinuka, Nyamunuka, Omusisa, South African stinkwood, Stinkwood, Tandimu, Tandimwa, Umdlautu, Umvumvu, White stinkwood, Witgatboom, Yisa

Distributed in: Angola, Benin, Central African Republic, Chad, Congo, Ethiopia, Ghana, Kenya, Lesotho, Nigeria, South Africa, Sudan, Tanzania, Togo, Uganda, Zaire, Zimbabwe (Africa)

Common uses: Agricultural implements, Boat building (general), Boxes and crates, Cabinetmaking, Chairs, Flooring, Furniture, Handles: general, Heavy construction, Joinery, Light construction, Mine timbers, Moldings, Particleboard, Plywood, Posts, Railroad ties, Sporting Goods, Tool handles, Toys, Vehicle parts, Veneer, Wheel spokes, Wheels

Tree size: Tree height is 20-30 m

Colors: the heart isWhite to cream, Yellow to golden-yellow to orangeand the sapwoodSame as heartwood .The grain isWavy, the textureMedium to coarseand the lusterMedium

Natural durability: The sapwood is susceptible to wood staining fungal attack, Very durable

Kiln Schedules: Drying (speed) is fast

Drying Defects: Slight surface checking, Splitting

Ease of Drying: Easy

Tree Identification: Bole/stem form is straight

Blunting Effect: Blunting effect on sawing green wood is severe

Boring: Easy

Cutting Resistance: Cutting Resistance with green wood is easy

Gluing: Easy to glue

Nailing: Difficult to nail, Easy to nail

Planing: Planes well, to a good finish

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to machine

Sanding: Good sanding finish

Steam bending: Very good

Screwing: Easy to screw, Pre-Boring is recommended in screwing ; Turning: Poor results

Polishing: Satisfactory; Staining: Finish is generally satisfactory ; Varnishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 705 kg/m3
Bending Strength 890 1377 kg/cm2
Crushing Strength 380 574 kg/cm2
Hardness 900 kg
Impact Strength 137 cm
Shearing Strength 200 kg/cm2
Stiffness 103 119 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight 689 560 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 12662 19586 psi
Density 44 lbs/ft3
Hardness 1986 lbs
Impact Strength 54 inches
Maximum Crushing Strength 5408 8171 psi
Shearing Strength 2852 psi
Stiffness 1473 1701 1000 psi
Weight 43 35 lbs/ft3
Radial Shrinkage 4 %

Density (dry weight) = 46-52 lbs/cu. ft. 0
Bending strength (MOR) = high 0
Density (dry weight) = 38-45 lbs/cu. ft. 1
Hard
Max. crushing strength = medium
Max. crushing strength = high
Modulus of Elasticity (stiffness) = low
Shrinkage, Radial = small
Shearing strength (parallel to grain) = high
Modulus of Elasticity (stiffness) = mediun
Bending strength (MOR) = medium
Toughness-Hammer drop (Impact Strength) = high
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very high
Hardness (side grain) = soft
Shrinkage, Radial = very small
Shrinkage, Radial = large
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = medium
Hardness (side grain) = medium

Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]Banks, C.H.,1970,The Durability of South African Wood and Wood Base Building Materials,South African Forestry Journal,No.75Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBrehme, K., et al,1967,Timbers of Ethiopia No.8 African Celtis (Celtis kraussiana,Ethiopia Forest Research Institute, Haile Sellassie University, Addis,AbabaBryce, J.M.,1967,Commercial Timbers of Tanzania,Tanzanian Forestry Division Util. Sec. MoshiChile Maderero,1953,El Olivillo,Chile Madero 3(2) p4Eggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaForest Products Research Laboratory, U.K.,1952,General Tests carried out on 3 Timber Species - Brachystegia - boehmii,,isoberlinia, spiciformis,Forest Products Research Laboratory, Department of Scientific and,Industrial ResearchGoldsmith, B., Carter, D.T.,1981,The Indigenous Timbers of Zimbabwe,Forestry Commission, Zimbabwe Research Bulletin No.9Hartwig, G.L.F.,1967,Flooring Timbers in South Africa,South African Builder,45(1,pp35-6Irvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanLoureiro, A.A., Freitas da Silva, M.,1968,Catalogo das Madeiras da Amazonia (2 vols,Min. do Ultramar Belem BrasilMurira, 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.23Scott, M.H.,1935,Weights of South African Growth Timbers,South African Department of Agriculture and Forestry Bulletin,No.145,Forest Products Institute, Forestry Series No.1Scott, M.H.,1948,Timber Seasoning in South Africa,South African Forestry Department South Africa Bulletin No.32Scott, M.H.,1950,Notes on the more Important African Timbers Imported into the Union with,Special Ref. to Port. E.A. Species,Journal of the South African Forestry Association,No.19,pp18-62,[South,African Forestry Journal]Scott, M.H.,1953,Utilisation Notes on South African Timbers,South African Forestry Department Bulletin No.36Tack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Timber Development Association Ltd.,1955,World Timbers (3 Vols.,Timber Development Association Ltd.Uganda Forest Department,1954,The Mechanical Properties of some Ugandan Timbers,Uganda Forest Department Timber Leaflet,No.1Uganda Forest Department,1957,Akasinsa (Celtis africana,Uganda Forestry Department Timber Leaflet,No.32Uganda Forest Department,1969,The Shrinkage of Some Ugandan Timbers,Uganda Forestry Department Timber Leaflet,No.47White, F.,1962,Forest Flora of Northern Rhodesia,O.U.P. LondonWimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
*Come interpretare i dati (manleva su eventuali imprecisioni)