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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. Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Family Name Gluing Grain Heartwood Color Luster Nailing Natural Durability Numerical Data Planing Polishing References Regions of Distribution Response to Hand Tools Sapwood Color Scientific Name Strength Properties Synonyms Texture Trade Name Tree Size Turning Scientific Name Ochna holstii Trade Name Common forest ochna Family Name Ochnaceae Synonyms Ochna acutifolia, Ochna chirindica, Ochna longpipes Common Names Common forest ochna, Lagatanet, Logontomwa, Lokotono, Mugimbi, Mungarima, Mutandi, Ol-daradach, Piriribayet, Red ironwood, Rooiysterhout, Tonso Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Kenya, South Africa, Zimbabwe Common Uses Agricultural implements, Boat building (general), Cabinetmaking, Carvings, Flooring: industrial heavy traffic, Fuelwood, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Mathematical instruments, Musical instruments, Piling, Plywood, Tool handles, Toys, Turnery, Veneer, Walking sticks, Wheel spokes Heartwood Color Red Brown Reddish brown Sapwood Color Red White to yellow Grain Straight Even Straight Texture Coarse Medium Fine Luster Lustrous Natural Durability Durable Moderately durable Susceptible to insect attack Resistant to powder post beetles Resistant to attack from termites (Isoptera) Resistant to attack from powder post (Lyctid & Bostrychid) beetles Moderately durable Drying Defects Moderate twist/warp Moderate surface checking Tree Size Tree height is 30-40 m Tree height is 0-10 m Tree height is 10-20 m Tree height is 20-30 m Bark width is 15-20 mm Cutting Resistance Cutting Resistance with green wood is easy Gluing Fairly Easy to Very Easy Easy to glue Nailing Possible if prebored Planing Planes well, to a good finish Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Easy to machine Turning Fairly Easy to Very Easy Polishing Good results Strength Properties Density (dry weight) = 53-60 lbs/cu. ft Shrinkage, Tangential = very small Shrinkage, Radial = very small Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = high Max. crushing strength = high Density (dry weight) = 61-67 lbs/cu. ft Bending strength (MOR) = high Shrinkage, Tangential = small Shrinkage, Radial = small Numerical Data Item Green Dry English Bending Strength 13576 20956 psi Density 56 lbs/ft3 Maximum Crushing Strength 6899 9945 psi Shearing Strength 2205 psi Stiffness 2167 2494 1000 psi Weight 55 45 lbs/ft3 Radial Shrinkage 2 % Tangential Shrinkage 5 % Item Green Dry Metric Bending Strength 954 1473 kg/cm2 Density 897 kg/m3 Maximum Crushing Strength 485 699 kg/cm2 Shearing Strength 155 kg/cm2 Stiffness 152 175 1000 kg/cm2 Weight 881 721 kg/m3 Radial Shrinkage 2 % References 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 Dale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards London Palgrave, K.C.,1977,Trees of Southern Africa,Cape Town South Africa Scott, 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.1 Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya