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GueleGuele
Guele (Prosopis africana)

Family: Leguminosae

Common names: Abusurung, Akaka, Akiye, Akwiye, Buse-segne, Dwadata, Guele, Her, Ir, Ironwood, Kaki, Kiriya, Kirya, Kohi, Kokara, Kpanena, Kpaye, Kyembo, Langbina, Langbung, Langjina, Nanzili, Nazari, Pangi, Pato, Pau carvao, Prekese, Pung-un-nung, Sanchi lati, Sanga, Ubwa, Yan, Yoruba charcoal wood, Zamturi, Zingili

Distributed in: Cameroon, Central African Republic, Gambia, Ghana, Guinea, Ivory Coast, Nigeria, Senegal, Sierra Leone, Sudan, Togo, Uganda, Zaire (Africa)

Distribution overview: The genus Prosopis consists of about 40 species with a growth range in the tropical regions of America and Asia. It is represented by only one species, P. africana in tropical Africa. reported to grow in the savannah regions from West to East Africa, and is found from Senegal to Sudan and Uganda.

Common uses: Agricultural implements, Barge fenders, Bedroom suites, Boat building (general), Boat building: framing, Cabinetmaking, Charcoal, Cooperages, Crossties, Docks, Dockwork, Drawer sides, Excelsior, Flooring, Flooring: commercial heavy traffic, Food containers, Fuelwood, Furniture , Handles: woodworking tools, Harbor work, Heavy construction, Joinery, Kitchen cabinets, Living-room suites, Marine construction, Mine timbers, Musical instruments, Naval architecture, Office furniture, Posts, Precision instruments, Radio - stereo - TV cabinets, Raft floats, Rafts, Railroad ties, Shipbuilding, Sporting Goods, Tables, Tool handles, Turnery, Vats, Vehicle parts, Wharf construction, Wheel spokes, Wheels

Environment profile: Status unknown in many of its growth areas

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isReddish dark brown , Yellow to golden-yellow to orangeand the sapwoodWhitish brown , Yellow.The grain isWavy, the textureMedium

Natural durability: Very durable, Very good weathering properties

Odor: Fragrant odor

Silica Content: Slight

Drying Defects: Slight surface checking

Ease of Drying: Fiber saturation point is very high

Tree Identification: Bole/stem form is misshapen

Comments: General finishing qualities are rated as good

Blunting Effect: Medium effect

Boring: Generally good

Cutting Resistance: Difficult to saw

Gluing: Good gluing properties

Mortising: Easy to mortise

Moulding: There is a moderate blunting effect

Movement in Service: There is a moderate blunting effect

Nailing: Possible if prebored, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Highly resistant

Response to hand tools: Easy to machine

Routing recessing: Medium blunting effect on cuttin tools

Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Fairly Easy to Very Easy

Polishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 849 kg/m3
Bending Strength 859 1331 kg/cm2
Crushing Strength 433 673 kg/cm2
Hardness 1333 kg
Impact Strength cm
Shearing Strength 150 kg/cm2
Stiffness 124 141 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 833 785 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 12226 18942 psi
Density 53 lbs/ft3
Hardness 2940 lbs
Maximum Crushing Strength 6170 9574 psi
Shearing Strength 2136 psi
Stiffness 1764 2019 1000 psi
Weight 52 49 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

Density (dry weight) = 61-67 lbs/cu. ft.
Density (dry weight) = 67-75 lbs/cu. ft.
Density (dry weight) = 53-60 lbs/cu. ft.
Shrinkage, Tangential = large
Shrinkage, Radial = large
Max. crushing strength = high
Bending strength (MOR) = high
Shrinkage, Volumetric = fairly large
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Shrinkage, Radial = fairly large
Hardness (side grain) = very hard
Compression strength (parallel to grain) = very high
Bending strength (MOR) = very high

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaGottwald, H., Noack, D.,1966,Anatomische und Physik-Technol. Untersuchungen an Holzarten de Sudan,Mitt. Bundforschanst.Forst-u Holzw,Vol.64Gotz, E.,1983,Timber trees of the Gambia,Stiftung Walderhaltung in Afrika and Bundesforschungsanstalt fur Forst-,und HolzwirtschaftIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J.1989. Trees of Nigeria.Revised Version of Nigerian Trees. Clarendon Press, Oxford.Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSavill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. London
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