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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 Cutting Resistance Drying Defects Ease of Drying Family Name Grain Heartwood Color Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Painting Planing References Regions of Distribution Resistance to Impregnation Resistance to Splitting Response to Hand Tools Sapwood Color Scientific Name Screwing Strength Properties Texture Trade Name Tree Identification Tree Size Turning Varnishing Veneering Qualities Scientific Name Markhamia hildebrandtii Trade Name Chyoo Family Name Bignoniaceae Common Names Chyoo, Mho, Mogu, Muho, Mungwani, Muu Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Kenya Common Uses Agricultural implements, Boat building (general), Boxes and crates, Cabinetmaking, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Matches, Piling, Plywood corestock, Plywood, Pulp/Paper products, Sporting Goods, Toys, Turnery, Vehicle parts, Veneer Heartwood Color Brown Red Purple Pink Pale brown Yellow to golden-yellow to orange Sapwood Color Brown Same as heartwood Grain Straight Even Straight Texture Medium Fine Medium Luster Medium Natural Durability Resistant to powder post beetles Susceptible to insect attack Non-durable Resistant to termites Perishable Moderately durable Non durable Susceptible to marine borer attack Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Pinworms (ambrosia beetles) may be present in the felled log Moderately resistant to termite (Isoptera) attack Moderately durable Drying Defects Distortion Checking Moderate twist/warp Moderate surface checking Ease of Drying Moderately Difficult to Difficult Tree Identification Bole/stem form is not buttressed Bole/stem form is fluted Tree Size Bole length is 10-20 m Tree height is 10-20 m Tree height is 30-40 m Trunk diameter is 100-150 cm Boring Fairly easy to very easy Fair to good results Cutting Resistance Fairly Difficult to Very Difficult to saw Moderate to saw Mortising Fair to Good Results Fairly Easy to Very Easy Moulding Fairly Easy to Very Easy Movement in Service Unstable with Poor Stability - Large Movement Nailing Pre-Boring Recommended Very Good to Excellent Results Fair to Good Results Possible if prebored Planing Poor to Very Poor Results Fairly Difficult to Very Difficult Fairly Easy to Very Easy Planes to a satisfactory finish Resistance to Impregnation Resistant heartwood Resistant sapwood Permeable sapwood Resistance to Splitting Poor Response to Hand Tools Easy to Work Moderate working qualities Screwing Pre-boring recommended Very Good to Excellent Results Fair to Good Results Turning Poor to Very Poor Results Fairly Difficult to Very Difficult Fairly Easy to Very Easy Veneering Qualities Easy to cut Suitable for slicing Suitable for peeling Painting Good results Varnishing Good results Strength Properties Density (dry weight) = 38-45 lbs/cu. ft. Density (dry weight) = 31-37 lbs/cu. ft. Shrinkage, Radial = fairly large Modulus of Elasticity (stiffness) = medium Max. crushing strength = medium Bending strength (MOR) = medium Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = moderate Shrinkage, Radial = large Shearing strength (parallel to grain) = medium Shearing strength (parallel to grain) = low Numerical Data Item Green Dry English Bending Strength 9310 14566 psi Density 36 lbs/ft3 Maximum Crushing Strength 3916 6397 psi Shearing Strength 1883 psi Stiffness 1665 1923 1000 psi Weight 35 28 lbs/ft3 Radial Shrinkage 5 % Tangential Shrinkage 9 % Item Green Dry Metric Bending Strength 654 1024 kg/cm2 Density 576 kg/m3 Maximum Crushing Strength 275 449 kg/cm2 Shearing Strength 132 kg/cm2 Stiffness 117 135 1000 kg/cm2 Weight 560 448 kg/m3 Radial Shrinkage 5 % 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 Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya