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Blunting Effect Boring Carving Comments Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Drying Rate Kiln Schedules Luster Mortising Moulding Movement in Service Nailing Natural Durability Natural Growth Defects Numerical Data Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sanding Sapwood Color Scientific Name Screwing Strength Properties Synonyms Texture Toxicity Trade Name Tree Identification Tree Size Turning Veneering Qualities		Scientific Name Schizolobium parahybum Trade Name Bacurubu Family Name Leguminosae Synonyms Schizolobium excelsum, Schizolobium parahyba, Cassia parahyba Common Names Bacurubu, Bacuruvu, Bandarra, Batsoari, Chapulaltapa, Cuchillal, Faveira, Gambombo, Gavilan, Guanacaste, Guaporuva, Guapuruvu, Judio, Melon, Pachaco, Palo de judio, Palo de picho, Parica, Pashaco, Pau de vintem, Plumajillo, Quam, Quamwood, Quon, Sora, Tambor, Tzementi, Zorra Regions of Distribution Central America, Latin America Countries of Distribution  [VIEW MAP] Belize, Bolivia, Brazil, Colombia, Ecuador, Guyana, Mexico, Peru Common Uses Boat building (general), Boxes and crates, Cabinetmaking, Canoes, Concrete formwork, Food containers, Furniture, Heavy construction, Joinery (external): ground contact, Joinery, Matches, Plywood, Pulp/Paper products, Toys, Turnery, Veneer Heartwood Color Brown Yellow Orange Green/grey Pink Green Pale brown Yellow to golden-yellow to orange White to cream Pale red to pink Sapwood Color Brown White Pink Yellow White to yellow Grain Figure Other (figure) Straight Interlocked Growth rings (figure) Even Distinct (figure) Other figure Straight Interlocked Clear growth rings (figure) Irregular color Distinct figure Broad stripe on quartersawn surfaces Texture Coarse Medium to coarse Medium Luster Medium Slightly lustrous Lustrous Natural Growth Defects Brittleheart is often frequent and extensive Natural Durability Susceptible to insect attack Non-resistant to powder post beetles Non-durable Perishable Perishable Non durable Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Sapwood is susceptible to wood staining fungal attack Heartwood susceptible to attack by decay fungi Toxicity Some toxic effects Kiln Schedules Drying (speed) is fast Drying Defects Checking Distortion No twisting or warping No surface checking Slight collapse and honeycomb No end splitting No cupping, generally Generally free from spring and bow Ease of Drying Variable Fairly Easy Easy Kiln Drying Rate Drying rate is fairly rapid to fast Drying rate is slow Tree Identification Bole/stem form is buttressed Bole/stem form is straight Bole/stem form is cylindrical Tree Size Sapwood width is 5-10 cm Sapwood width is 0-5 cm Bole length is 10-20 m Trunk diameter is 100-150 cm Tree height is 30-40 m Comments General finishing qualities are rated as good Blunting Effect Blunting effect on sawing dry wood is mild Boring Fairly easy to very easy Fair to good results Easy Carving Fair to Good Results Fairly Easy to Very Easy Cutting Resistance Easy to saw Cutting Resistance with green wood is easy Cutting Resistance with dry wood is easy Gluing Easy to glue Mortising Fairly Easy to Very Easy Finishes well Easy to mortise Moulding Fairly Easy to Very Easy Fair to Good Results Good finishing results Easy to mould Movement in Service Excellent Stability - Small Movement Nailing Fair to Good Results Very Good to Excellent Results Fairly Difficult to Very Difficult Poor to Very Poor Results Nails hold poorly Holds nails well Easy to nail Planing Fair to Good Results Fairly Easy to Very Easy Planes well, to a good finish Easy to plane Resistance to Impregnation Permeable sapwood Sapwood is permeable Heartwood is permeable Heartwood is moderately resistant Response to Hand Tools Responds Readily Easy to Work Easy to machine Variable qualities Routing & Recessing Fairly Easy to Very Easy Fair to Good Results Routing yields good results Routing is easy Sanding Fair to Good Results Fairly Easy to Very Easy Good sanding finish Easy to sand Screwing Poor results Easy to screw Turning Fairly Easy to Very Easy Fair to Good Results Poor results Easy to turn Veneering Qualities Suitable for peeling Veneers easily Veneers moderately easy Suitable for peeling Easy to cut Polishing Fair to Good Results Strength Properties Bending strength (MOR) = very low Max. crushing strength (stiffness) = very low Shearing strength (parallel to grain) = very low Modulus of Elasticity (stiffness) = very low Hardness (side grain) = very soft Density (dry weight) = 23-30 lbs/cu. ft. Density (dry weight) = 15-22 lbs/cu. ft. Shrinkage, Volumetric = moderate Shrinkage, Tangential = moderate Shrinkage, Radial = moderate Modulus of Elasticity (stiffness) = medium Max. crushing strength = low Hardness (side grain) = soft Bending strength (MOR) = low Numerical Data Item Green Dry English Bending Strength 2959 4369 psi Density 23 lbs/ft3 Hardness 454 lbs Maximum Crushing Strength 926 1789 psi Shearing Strength 882 psi Stiffness 1147 1343 1000 psi Weight 23 19 lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 7 % Volumetric Shrinkage 11 % Item Green Dry Metric Bending Strength 208 307 kg/cm2 Density 368 kg/m3 Hardness 205 kg Maximum Crushing Strength 65 125 kg/cm2 Shearing Strength 62 kg/cm2 Stiffness 80 94 1000 kg/cm2 Weight 368 304 kg/m3 Radial Shrinkage 4 % Tangential Shrinkage 7 % References Almeida, D.G. de, Costa, J.R. da,1956,Madeiras do Brasil. (Timbers of Brazil.,Min. Ag. Servico de Economia Rural, Rio de Janeiro, Brazil,pp56 Belize,1946,42 Secondary Hardwood Timbers of British Honduras,British Honduras Forest Department Bulletin,No.1 Berni, C.A., Bolza, E., Christensen, F.J.,1979,South American Timbers - The Characteristics, Properties and Uses of 190,Species,C.S.I.R.O Div. Building Research Mainieri, C., Pereira, J.A.,1965,Madeiras do Brasil,Anuario Brasileiro de Economia Florestal,17(17,PP135-416 Mainieri, C.,1970,Madeiras Brasilieras,Sao Paulo Secretaria da Agricultra, Institulo Florestral Mainieri, C.,1973,Madeiras do litoral sul Sao Paulo, Parana e sta.catarina,Sao Paulo Secretaria da Agricultura, Ins. Flor. Bol. Tec no.3 Mainieri, C.,1978,Fichas de Caracteristicas das Madeiras Brasileiras,Inst. Pesquisas Technologicas Pennington, T.D., Sarukhan, J.,1968,Manual para la Identificacion de campo de los Principales Arboles,Tropicales de Mexico,Inst. Nac. Inv. For. Mexico Peru - P.A.D.T.,1981,Descripcion general y anatomica de 105 Maderas del Grupo Andino,Junta del Acuerdo de Cartagena, P.A.D.T. Report, Junac, Lima, Peru. Peru - P.A.D.T.,1981,Tablas de propiedades fisicas y mecariicas de la Madera de 24 especies de,Colombia,Junta del Acuerdo de Cartagena, P.A.D.T. Report, Lima, Peru. Record, S.J., Hess, R.W.,1943,Timbers of the New World,Yale University Press Record, S.J.,1925,Schizolobium: A Promising Source of Pulpwood,Tropical Woods 1(2) pp2-5 Record, S.J.,1927,Trees of Honduras,Tropical Woods,10, pp10-47 Richter, et al, H.G.,1974,Estudo Technological Guapuruvu (Schizolobium parahybum,Floresta V(1) pp26-30 Richter, et al, H.G.,1975,Technological Study of Schizolobium parahybum II Plywood Manufacture,Revista Floresta VI (1) pp14-23 Rizzini, C.T.,1978,Arvores e Madeiras Uteis do Brasil: Manual de Dendrologia Brasileira,Editora Edgard Blucher LTDA Brazil Sao Paulo - Instituto de Pesquisas Tecnologicas,1956,Tabelas de Resultados obtidos para Madeiras Nacionais,Inst. Pesq. Tec. Sao Paulo, Brazil Bol., No.31(2nd Ed.) Vink, A.T.,1965,Surinam Timbers,Surinam Forest Service Paramaribo,3rd rev. ed.