Scientific Name
Erisma uncinatum
Trade Name
Jaboty
Family Name
Vochysiaceae
Common Names
Cambara, Cedrinho, Couaie, Feli kouali, Felli kouali, Jaboti, Jaboty, Jaboty da terra firma, Kokopaie, Leteballibelero, Manonti kaouali, Manonti kouali, Mureillo, Quariuba, Quaruba vermelha, Quarubarana, Quarubatinga, Singri-kwari, Singrie kwarie
Regions of Distribution
Central America, Latin America
Countries of Distribution [VIEW MAP]
Brazil, French Guiana, Guyana, Suriname, Venezuela
Common Uses
Bedroom suites, Boat building, Boxes and crates, Cabinetmaking, Chairs, Chests, Concrete formwork, Decorative plywood, Desks, Fine furniture, Fuelwood, Furniture , Furniture, Joinery, Living-room suites, Moldings, Office furniture, Packing cases, Plywood, Rustic furniture, Shipbuilding, Tables , Utility furniture, Wardrobes
Environmental Profile
| Status has not been officially assessed |
Distribution Overview
Humid, sub-tropical and tropical forests of Santa Cruz, Beni and Pando in Bolivia. May also be present in the Guianas, Surinam and Venezuela.
Heartwood Color
| Brown | ||||||||||||
| Yellow | ||||||||||||
| Green/grey | ||||||||||||
| Orange | ||||||||||||
| Pale red to pink | ||||||||||||
| Reddish brown | ||||||||||||
| Purplish brown | ||||||||||||
| Pale pink brown | ||||||||||||
| Pale brown | ||||||||||||
| Brown |
Sapwood Color
| White | ||||||||||||
| Yellow | ||||||||||||
| White to yellow | ||||||||||||
| Grey | ||||||||||||
| Different than heartwood | ||||||||||||
| Clearly differentiated from the heartwood |
Grain
| Straight | ||||||||||||
| Even |
| Straight |
Texture
| Fine | ||||||||||||
| Medium | ||||||||||||
| Medium to coarse | ||||||||||||
| Coarse |
Luster
| Low |
Natural Durability
| Durable | ||||||||||||
| Very durable | ||||||||||||
| Resistant to marine borers | ||||||||||||
| Susceptible to insect attack | ||||||||||||
| Resistant to termites | ||||||||||||
| Resistant to powder post beetles | ||||||||||||
| Susceptible to attack from termites (Isoptera) | ||||||||||||
| Susceptible to termite attack | ||||||||||||
| Susceptible to attack from powder post (Lyctid & Bostrychid) beetles | ||||||||||||
| Sapwood is susceptible to wood staining fungal attack | ||||||||||||
| Resistant to attack from powder post (Lyctid & Bostrychid) beetles | ||||||||||||
| Moderately durable | ||||||||||||
| Durable |
Good resistance to attack by decay-causing fungi and dry-wood insects
Odor
| No specific smell or taste |
Silica Content
| High | ||||||||||||
| Slight |
Kiln Schedules
| Kiln Drying Rate (in days) is fairly rapid | ||||||||||||
| Drying (speed) is fast |
Drying Defects
| Checking | ||||||||||||
| Distortion | ||||||||||||
| Splitting | ||||||||||||
| Moderate surface checking | ||||||||||||
| Distortion (twist/warp) is likely | ||||||||||||
| Checking |
Ease of Drying
| Moderately Difficult to Difficult | ||||||||||||
| Fairly Easy | ||||||||||||
| Slowly | ||||||||||||
| Little degrade if dried properly | ||||||||||||
| Dries at a fairly rapid rate |
Kiln Drying Rate
| Naturally dries at a moderate speed | ||||||||||||
| Naturally dries slowly | ||||||||||||
| Fairly rapid (11-17 days for boards under 32 mm, to 31-51 days for boards greater than 63 mm) |
Tree Identification
| Bole/stem form is buttressed |
Tree Size
| Tree height is 30-40 m | ||||||||||||
| Sapwood width is 5-10 cm | ||||||||||||
| Sapwood width is 0-5 cm | ||||||||||||
| Sapwood width is 10-15 cm | ||||||||||||
| Bole length is 20-30 m | ||||||||||||
| Tree height is 20-30 m | ||||||||||||
| Bole length is 10-20 m | ||||||||||||
| Tree height is 40-50 m |
Product Sources
The ITTO reports that the species is an important source of timber. The timber is exported regularly, and is imported from Brazil into China.
Blunting Effect
| High to severe | ||||||||||||
| Slight effect | ||||||||||||
| Blunting effect on machining is fairly severe |
Boring
| Easy |
Cutting Resistance
| Fairly Difficult to Very Difficult to saw | ||||||||||||
| Easy to saw | ||||||||||||
| Cutting Resistance with green wood is easy |
Internal growth stresses may be present.
Gluing
| Fairly Difficult to Very Difficult | ||||||||||||
| Good properties | ||||||||||||
| Easy to glue |
Movement in Service
| Unstable with Poor Stability – Large Movement | ||||||||||||
| Fair to Good Stability – Medium Movement |
Nailing
| Holds nails well | ||||||||||||
| Easy to nail |
Planing
| Good planing properties | ||||||||||||
| Easy to plane |
Worked surfaces tend to be fuzzy.
Resistance to Impregnation
| Response to treatment varies from moderate to poor |
Response to Hand Tools
| Fairly Difficult to Difficult to Work | ||||||||||||
| Easy to machine |
Sanding
| Very good characteristics | ||||||||||||
| Good sanding finish | ||||||||||||
| Easy to sand |
Screwing
| Easy to screw |
Veneering Qualities
| Suitable for slicing | ||||||||||||
| Suitable for peeling | ||||||||||||
| No steaming needed during bolt preparation. | ||||||||||||
| Easy to cut | ||||||||||||
| Bolt preparation requires steaming |
Painting
| Good results |
Polishing
| Good results |
Staining
| Finish is generally good |
Varnishing
| Good results |
Strength Properties
| Density (dry weight) = 38-45 lbs/cu. ft. | ||||||||||||
| Density (dry weight) = 31-37 lbs/cu. ft. | ||||||||||||
| Bending strength (MOR) = low | ||||||||||||
| Shrinkage, Tangential = large | ||||||||||||
| Shrinkage, Radial = fairly large | ||||||||||||
| Modulus of Elasticity (stiffness) = medium | ||||||||||||
| Max. crushing strength = medium | ||||||||||||
| Max. crushing strength = high | ||||||||||||
| Bending strength (MOR) = medium | ||||||||||||
| Bending strength (MOR) = high | ||||||||||||
| Shrinkage, Tangential = moderate | ||||||||||||
| Shrinkage, Tangential = fairly large | ||||||||||||
| Shrinkage, Radial = small | ||||||||||||
| Shrinkage, Radial = moderate | ||||||||||||
| Shrinkage, Radial = large | ||||||||||||
| Shearing strength (parallel to grain) = very low | ||||||||||||
| Modulus of Elasticity (stiffness) = very low | ||||||||||||
| Modulus of Elasticity (stiffness) = low | ||||||||||||
| Modulus of Elasticity (stiffness) = high | ||||||||||||
| Hardness (side grain) = soft | ||||||||||||
| Bending strength (MOR) = very high |
Numerical Data
| Item | Green | Dry | English |
| Bending Strength | 9638 | 14575 | psi |
| Crushing Strength | 432 | 795 | psi |
| Density | 37 | lbs/ft3 | |
| Hardness | 941 | lbs | |
| Maximum Crushing Strength | 4714 | 7774 | psi |
| Shearing Strength | 1019 | psi | |
| Stiffness | 1457 | 1711 | 1000 psi |
| Specific Gravity | 0.42 | 0.51 | |
| Weight | 36 | 31 | lbs/ft3 |
| Radial Shrinkage | 4 | % | |
| Tangential Shrinkage | 9 | % | |
| Volumetric Shrinkage | 13 | % | |
| Item | Green | Dry | Metric |
| Bending Strength | 677 | 1024 | kg/cm2 |
| Crushing Strength | 30 | 55 | kg/cm2 |
| Density | 592 | kg/m3 | |
| Hardness | 426 | kg | |
| Maximum Crushing Strength | 331 | 546 | kg/cm2 |
| Shearing Strength | 71 | kg/cm2 | |
| Stiffness | 102 | 120 | 1000 kg/cm2 |
| Specific Gravity | 0.42 | 0.51 | |
| Weight | 576 | 496 | kg/m3 |
| Radial Shrinkage | 4 | % | |
| Tangential Shrinkage | 9 | % |
References
Bois et Forets des Tropiques,1984,Jaboty – Erisma uncinatum,Bois et Forets des Tropiques Vol. 204 p.57-60
Boone, R.S., C.J. Kozlik, P.J. Bois, E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Hardwoods – Temperate and Tropical. USDA, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.
Chichignoud, M., G. Deon, P. Detienne, B. Parant, and P. Vantomme. 1990. Tropical Timber Atlas of Latin America. International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.
Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood B. Wood Species from S. American Tropical,Moist Forests,F.A.O. Forestry Department
I.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer Cutting
Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l’Union Francaise,C.T.F.T
Takahashi, A.,1975,Compilation of data on the Mechanical Properties of Foreign Woods (Part 2,Central and South America,Shimane University, Japan, Research Report on Foreign Wood No.4
Teixeira, D. E., M. A. E. Santana and M. Rabelo de Souza. 1988. Amazonian Timbers for the International Market. ITTO Technical Series 1. Brazilian Institute for Forestry Development, Brazil.