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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. Boring Common Names Common Uses Countries of Distribution Drying Defects Family Name Grain Heartwood Color Kiln Schedules Luster Natural Durability Numerical Data Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Sapwood Color Scientific Name Strength Properties Texture Trade Name Tree Identification Tree Size Scientific Name Mildbraediodendron excelsum Trade Name Bombo Family Name Leguminosae Common Names Bombo, Muyati, Nkoba, Nnabulere Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Cameroon, Congo, Ghana, Uganda Common Uses Bridge construction, Flooring, Flooring: commercial heavy traffic, Heavy construction, Lock gates, Marine construction, Railroad ties, Veneer: decorative Heartwood Color Yellow Orange Brown Yellow to golden-yellow to orange Sapwood Color Yellow Grain Figure Interlocked Distinct (figure) Stripe (figure) Interlocked Striped figure Distinct figure Distinct and very fine figure Texture Fine Coarse Luster Medium Natural Durability Very durable Susceptible to marine borer attack Resistant to attack from termites (Isoptera) Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Durable Kiln Schedules Dry at a slow speed Drying Defects Moderate end spitting Tree Identification Bole/stem form is straight Bole/stem form is buttressed Tree Size Tree height is 10-20 m Boring Moderately easy Resistance to Impregnation Heartwood is extremely resistant Response to Hand Tools Easy to Work Difficult to machine Polishing Fair to Good Results Very Good to Excellent Results Strength Properties Shrinkage, Tangential = fairly large Shrinkage, Radial = large Density (dry weight) = 53-60 lbs/cu. ft Density (dry weight) = 46-52 lbs/cu. ft. Toughness-Hammer drop (Impact Strength) = medium Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = medium Max. crushing strength = high Hardness (side grain) = very soft Bending strength (MOR) = medium Numerical Data Item Green Dry English Bending Strength 9310 14566 psi Density 51 lbs/ft3 Hardness 319 lbs Impact Strength 40 inches Maximum Crushing Strength 6899 9945 psi Shearing Strength 2205 psi Stiffness 1665 1923 1000 psi Weight 50 40 lbs/ft3 Radial Shrinkage 6 % Tangential Shrinkage 9 % Item Green Dry Metric Bending Strength 654 1024 kg/cm2 Density 817 kg/m3 Hardness 144 kg Impact Strength 101 cm Maximum Crushing Strength 485 699 kg/cm2 Shearing Strength 155 kg/cm2 Stiffness 117 135 1000 kg/cm2 Weight 801 641 kg/m3 Radial Shrinkage 6 % References Eggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe Uganda Irvine, F.R.,1961,Woody Plants of Ghana,O.U.P. London Tack, C.H.,1969,Uganda Timbers,Govt. Printer Uganda Uganda Forest Department,1969,The Shrinkage of Some Ugandan Timbers,Uganda Forestry Department Timber Leaflet,No.47 Uganda Forest Department,1972,Muyati (Mildbraediodendron excelsum,Uganda Forestry Department Timber Leaflet, No.50