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EVEUSS (Klainedoxa gabonensis)
Trade Name
Eveuss
Scientific Name
Klainedoxa gabonensis Pierre
Family
IRVINGIACEAE
Common Names
Kroma (Côte d`Ivoire); Kuma-kuma (Zaire); Ikele (Zaire); Eveuss (Gabon); Eves (Gabon); Eveuss (Equatorial Guinea); Eves (Equatorial Guinea); Kuma-kuma (Congo); Ngon (Cameroon); Usen; Oban ngon; Ngon; Kuma-kuma; Kroma; Kododebu; Eveuss; Bisiabo; Astratoanini; Akoankyere; Mututtu (Uganda); Odudu (Nigeria)
Scientific Name Synonyms
Klainedoxa zenkeri van Tiegh.; Klainedoxa oblongifolia (Engl.) Stapf
Description Of The Tree
Botanical Description
The tree reaches a height of 50 m, with trunk diameters from 100 to 150 cm. The bole is usually straight, clear and cylindrical, up to to 30 m in length. It presents high buttresses.
Natural Habitat
Klainedoxa gabonensis occurs in evergreen forest on sandy soils.
Natural Distribution
West Africa, from Guinea to Sudan and Uganda.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Tyloses thin walled. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits coa Axial parenchyma in continuous tangential lines or fine bands. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Over 9 cells per parenchyma strand. Axial parenchyma bands more than 3 cells wide. Axial parenchyma bands under 4 per mm. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Non-septate fibers. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is orange-yellow or golden-brown, darkening on exposure to a dark brown with black veining, it is not clearly demarcated.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
Straight or sometimes interlocked. Usually interlocked grain is absent or very slight, without any effect on further processing operations.
Texture
This wood has a somewhat medium texture.
Luster
The surface of the wood is naturally low in luster.
Natural Durability
Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. The heartwood is sensible to Lyctus attacks.
Natural durability index (1= Very high durability, 7=Vey low durability)
1
Internal Growth Stresses
For this species no growth stresses are reported.
Silica Content
Silica Content: Silica content is negligible. Amounts over 0.05% may affect wood processing. Silica Value: 0.02
Resistance To Impregnation
Difficult to treat with only a low penetration of the preservative products.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.89
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
1.04
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.5
Total shrinkage Radial (Saturated to 0%MC) (%)
7.6
Drying Defects
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of distortions when interlocked grain is present. Kiln Schedules: The kiln schedule has been tested.
Recommended Dry Kiln Schedule
FR-7
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.3
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1589
Stiffness (MOE) 12%MC (kgf/cm²)
260400
Compression parallel to fiber 12%MC (kgf/cm²)
899
Compression perpendicular to fiber 12%MC (kgf/cm²)
136
Shear strength radial 12%MC (kgf/cm²)
164
Janka hardness (side) 12%MC (kgf)
1367
Janka hardness (end grain) 12%MC (kgf)
1341
Workability
Sawing
Sawing of this species requires powerful equipment.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Machining
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Planing
Rather difficult; special tools are needed.
Moulding
Moderately easy; tools must be cautiously sharpened.
Boring
Moderately easy; tools must be cautiously sharpened.
Mortising
Moderately easy; tools must be cautiously sharpened.
Nailing
Pre-boring is necessary.
Gluing
Difficult to glue because of high density.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
Working with hand tools is difficult.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, bridges, poles, rails, crossarms, crossties, piers, HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, CONTAINERS, truck bodies, truck flooring
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poles
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Rails
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
Crossheads Crossarms
- 7 - Maderas latinoamericanas. II, Quercus alata Q. costaricensis y Q. eugeniaefolia
Crossties
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
Piers
- 9 - Maderas latinoamericanas. IV, Nectandra sp. Ocotea austinii, Persea sp. aff. vesticula, Persea schiedeana
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Joists
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Frames
- 16 - Woods of the World
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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