Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Boring Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Family Name Grain Heartwood Color Kiln Drying Rate Kiln Schedules Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Planing Polishing References Regions of Distribution Resistance to Impregnation Resistance to Splitting Response to Hand Tools Sapwood Color Scientific Name Strength Properties Texture Toxicity Trade Name Tree Identification		Scientific Name Allanblackia stuhlmannii Trade Name Allanblackia Family Name Guttiferae Common Names Allanblackia, Mkange, Mkanya, Mkanye, Msambu, Mwaka Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Tanzania Common Uses Agricultural implements, Boxes and crates, Cabinetmaking, Flooring: industrial heavy traffic, Furniture, Joinery, Light construction, Particleboard, Piling, Plywood, Toys, Turnery, Veneer Heartwood Color Purple Dark brown Sapwood Color Different than heartwood Grain Even Straight Straight Texture Fine Medium Luster Medium Natural Durability Perishable Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Non durable Toxicity Some toxic effects Kiln Schedules UK=A US=T2D4/T2D3 Fr=1 Kiln Drying Rate (in days) is fairly rapid Dry at a slow speed Drying Defects Slight end splitting Severe cupping Slight surface checking Kiln Drying Rate Fairly rapid (11-17 days for boards under 32 mm, to 31-51 days for boards greater than 63 mm) Tree Identification Bole/stem form is buttressed Bole/stem form is straight Boring Easy Cutting Resistance Cutting Resistance with dry wood is moderate Mortising Moderately easy to mortise Finishes satisfactorily Moulding Satisfactory moulding results Moulding ease is moderate Good finishing results Movement in Service Not stable/prone to move Large Nailing Holds nails well Planing Planes to a satisfactory finish Ease of planing is moderate Resistance to Impregnation Sapwood is permeable Heartwood is extremely resistant Resistance to Splitting Satisfactory Response to Hand Tools Easy to Work Easy to machine Polishing Very Good to Excellent Results Fair to Good Results Good results Strength Properties Density (dry weight) = 46-52 lbs/cu. ft. Max. crushing strength = medium Bending strength (MOR) = medium Density (dry weight) = 38-45 lbs/cu. ft. Shearing strength (parallel to grain) = low Modulus of Elasticity (stiffness) = medium Shrinkage, Tangential = fairly large Shrinkage, Radial = very small Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = low Hardness (side grain) = soft Bending strength (MOR) = low Toughness (total work) = low Shrinkage, Tangential = large Shrinkage, Radial = small Shearing strength (parallel to grain) = very low Max. crushing strength = high Numerical Data Item Green Dry English Bending Strength 8397 13144 psi Density 45 lbs/ft3 Hardness 995 lbs Maximum Crushing Strength 4413 6988 psi Shearing Strength 1662 psi Stiffness 1543 1781 1000 psi Toughness 167 inch-lbs Weight 44 35 lbs/ft3 Radial Shrinkage 2 % Tangential Shrinkage 9 % Item Green Dry Metric Bending Strength 590 924 kg/cm2 Density 721 kg/m3 Hardness 451 kg Maximum Crushing Strength 310 491 kg/cm2 Shearing Strength 116 kg/cm2 Stiffness 108 125 1000 kg/cm2 Toughness 192 cm-kg Weight 705 560 kg/m3 Radial Shrinkage 2 % References 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.48 Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research Murira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi. Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7 Tanzania Forest Department,1960,The Natural Durability of Local Timbers,Tanzanian Forest Dept. Tech. Note,No.14 Tanzania Forest Division,1966,Kiln Drying Schedules for Tanzania Timbers Technical Note no.38,Tanzania Forest Div. Util. Sec. Moshi Tanzania Forestry Department,1961,Timbers of Tanganyika - Allanblackia stuhlmannii (mkanya, msambu,Tanzania Forestry Department, Utilisation Section, Moshi - Timbers of,Tanganyika