Wood inspector

Item	Green	Dry	Metric
Specific Gravity		0,66
Density		801	kg/m3
Bending Strength	765	1028	kg/cm2
Crushing Strength		143	kg/cm2
Hardness		948	kg
Impact Strength			cm
Shearing Strength		154	kg/cm2
Stiffness	77	93	1000 kg/cm2
Tangential Shrinkage			%
Radial Shrinkage	3		%
Weight	785	608	kg/m3
Maximum Load			cm-kg/cm3
Toughness		237	cm-kg
Static Bending		502	kg/cm2

Density (dry weight) = 46-52 lbs/cu. ft.
Max. crushing strength = medium
Bending strength (MOR) = medium
Shrinkage, Radial = small
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = very low
Shrinkage, Tangential = small
Shrinkage, Tangential = moderate
Hardness (side grain) = hard
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = low
Max. crushing strength = high
Hardness (side grain) = medium
Density (dry weight) = 53-60 lbs/cu. ft
Bending strength (MOR) = very high
Bending strength (MOR) = low
Bending strength (MOR) = high
The bending strength of air-dried wood of the species is similar to that of Teak, which is considered to be strong. Compression strength parallel to grain in the air-dry condition is high. Teak, White oak, and Hard maple have high crushing strength. It is hard - harder than Teak, and does not marr or dent easily. It is a very heavy wood. The density of the wood is very high.

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 ResearchChalk, L., et al,1932,Some East African Coniferae and Leguminosae,Forest Trees and Timbers of the British Empire,Part 1Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFanshawe, D.B.,1962,Fifty Common Trees of Northern Rhodesia,Natural Resources Board and Forestry Department, NdolaFarmer, R.H.,1972,Handbook of Hardwoods,HMSOGoldsmith, B., Carter, D.T.,1981,The Indigenous Timbers of Zimbabwe,Forestry Commission, Zimbabwe Research Bulletin No.9Hartwig, G.L.F.,1966,Flooring Timber in South Africa - Guiboutia coleosperma,South African Builder,44(12, pp33-5HMSO. 1981. Handbook of Hardwoods, 2nd Edition. Revised by R.H. Farmer. Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.Palgrave, K.C.,1977,Trees of Southern Africa,Cape Town South AfricaPardy, A.A.,1952,Notes on Indigenous Trees and Shrubs of S. Rhodesia - Guibourtia,coleosperma,Ministry of Agriculture and Lands S.Rhodesia Bulletin,No.1652Rio Rivuma. 1995. Guibourtia coleosperma. On Rivuma Species List, Mozambique, October, 1994. Rio Rivuma, 229 A Street, Boston, MA.Scott, 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]South African Lumber Millers Assoc.,1969,Notes on some Commercially Available Hardwoods,S.A.L.M.A. Timber Info. Centre Timber Technical Guide,No.1Storrs, A.E.G.,1979,Know your Trees - Some of the Common Trees found in Zambia,Zambia Forestry Department, NdolaTakahashi, 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 Information Assoc. Ltd.,1947,Notes on East African Timbers,TRADA, Timber Information, No.28WCMC. 1992. Conservation Status Listing: Trees and Timbers of the World. World Conservation Monitoring Center (WCMC, Plants Program, 219 Huntingdon Road, Cambridge, CB3 ODL, United Kingdom.White, F.,1962,Forest Flora of Northern Rhodesia,O.U.P. London