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Mchenga (Julbernardia globiflora)
Family: Leguminosae Common names: Mchenga, Mgombo, Mpanate, Msima, Muba, Muimbi, Munondo, Musima, Muwa Distributed in: Mozambique, Tanzania, Zambia, Zimbabwe (Africa) Common uses: Agricultural implements, Boat building (general), Cabinetmaking, Canoes, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Mathematical instruments, Mine timbers, Piling, Plywood, Railroad ties, Toys, Turnery, Veneer, Wheel spokes, Wheels Environment profile: Vulnerable Tree size: Trunk diameter is 150-200 cm
Colors: the heart isRed, Reddish brownand the sapwoodWhite to yellow, Yellow.The grain isWeak figure, the textureMedium coarse to coarseand the lusterMedium
Natural durability: Susceptible to insect attack, Very durable Odor: Has an odor
Kiln Schedules: Kiln Drying Rate (in days) is slow Kiln Drying Rate: Very slow (>28 days for boards < 32 mm, to >84 days for boards >= 63 mm) Drying Defects: Slight surface checking, Splitting Ease of Drying: Slowly Tree Identification: Bole/stem form is straight Blunting Effect: Moderate Boring: Fairly easy to very easy Carving: Fairly Easy to Very Easy Cutting Resistance: Fairly Difficult to Very Difficult to saw Gluing: Surface Preparation Mortising: Fairly Easy to Very Easy Moulding: Fairly Easy to Very Easy Movement in Service: Fairly Easy to Very Easy Nailing: Possible if prebored, Very Good to Excellent Planing: Fairly Easy to Very Easy Resistance to Impregnation: Sapwood is permeable Resistance to Splitting: Poor
Response to hand tools: Responds Readily Routing recessing: Fairly Easy to Very Easy Sanding: Fairly Easy to Very Easy Steam bending: Moderate
Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Very Good to Excellent Results
Polishing: Satisfactory; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;
Max. crushing strength = high Density (dry weight) = 61 - 67 lbs/cu. ft. Shrinkage, Tangential = small Shrinkage, Radial = moderate Density (dry weight) = 46-52 lbs/cu. ft. Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = high Bending strength (MOR) = medium Bending strength (MOR) = high Modulus of Elasticity (stiffness) = medium Density (dry weight) = 53 - 60 lbs/cu. ft. Work to Maximum Load = low Shrinkage, Tangential = very small Shrinkage, Radial = very small Shrinkage, Radial = small Shearing strength (parallel to grain) = high Max. crushing strength = medium Toughness (total work) = medium Shrinkage, Tangential = moderate Shrinkage, Tangential = fairly large Shearing strength (parallel to grain) = low Hardness (side grain) = very hard Hardness (side grain) = medium Hardness (side grain) = hard Banks, C.H. and J.P. Schoeman. 1963. Railway Sleeper and Crossing Timbers. Bulletin No. 41, Republic of South Africa. The Government Printer, Pretoria, South Africa.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.48Bolza, 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. and Kitambi, G.,1960,The Air-drying Properties of some Tanganyika Timbers Technical Note No 23,Tanganyika Forest Department Utilisation Division Technical NoteBryce, J.M.,1967,Commercial Timbers of Tanzania,Tanzanian Forestry Division Util. Sec. MoshiChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Forests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research EstablishmentLavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)Murira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.Palgrave, K.C.,1977,Trees of Southern Africa,Cape Town South AfricaTakahashi, 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 Division,1966,Kiln Drying Schedules for Tanzania Timbers Technical Note no.38,Tanzania Forest Div. Util. Sec. MoshiTanzania Forestry Department,1966,Timbers of Tanganyika - Julbernardia globiflora,Tanzania Forestry Department, Utilisation Section, Moshi - Timbers of,Tanganyika |
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