Select Language:  

logo

< Back EYOUM (Dialium bipindense) Print Friendly View

< Back Print Friendly View

EYOUM (Dialium bipindense)

Trade Name

Eyoum

Scientific Name

Dialium bipindense Harms

Family

LEGUMINOSAE

Common Names

Pau veludo (Guinea-Bissau); Kofina (Côte d`Ivoire); Afambéou (Côte d`Ivoire); Kasudu (Zaire); Bongola (Zaire); Omvong (Gabon); Eyoum (Gabon); Penzi (Congo); Mfang (Cameroon); M'fan (Cameroon); Ziba (Mozambique)

Scientific Name Synonyms

Dialium fleuryi Pellegr.; Dialium connaroides Harms ex De Wild.

Description Of The Tree

Botanical Description

The tree reaches a height of 20 to 40 m, with trunk diameters up to 100 cm. The bole attains 26 m long.

Natural Habitat

Dialium bipindense is a large canopy timber tree found in abundance in lowland rain forest, in primitive forests near rivers or in periodically swampy areas.

View More Information

Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). Brown-colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. V Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma in continuous tangential lines or fine bands. Axial parenchyma storied. Siliceous bodies in the axial parenchyma cells. 3 to 4 cells per parenchyma strand. Axial parenchyma bands mor 4 to 10 rays per mm (medium). Rays 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.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Color

The sapwood is whitish, it has a thickness of 3 to 5 cm. The heartwood is dark pink-brown, dark red or almost black, with occasional small markings, it is clearly demarcated.

COLOR INDEX (1=Black, 7=Light yellow,white)

3

Grain

Straight or slightly interlocked; grain has no particular influence on drying, machining and finishing qualities.

Texture

The texture of the wood is medium.

Luster

Timber of this species is 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. Heartwood is resistant to Lyctus attacks.

Natural durability index (1= Very high durability, 7=Vey low durability)

1

Internal Growth Stresses

Residual stresses are reported to be absent.

Resistance To Impregnation

Nearly impossible to treat with a too much low penetration of the preservative substances.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.92

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

1.08

Drying Defects

Ease of Drying: The wood is easy to dry without significant defects. Drying Defects: Face checking and twist are common problems in un-weighted boards. Kiln Schedules: The recommended kiln drying schedule specifies a temperature of 54 to 82 degrees with corresponding relative humidity of 76% to 30%. Boards 25 mm thick can be dried to 15% moisture content within 8 days.

Recommended Dry Kiln Schedule

FR-12

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1255

Compression parallel to fiber 12%MC (kgf/cm²)

986

Compression perpendicular to fiber 12%MC (kgf/cm²)

154

Janka hardness (side) 12%MC (kgf)

1476

Janka hardness (end grain) 12%MC (kgf)

1425

Workability

Sawing

Sawing of this species requires powerful equipment.

Rotary Veneer Cutting

Suitable for slicing.

Sliced Veneer

Suitable for slicing.

Blunting Effect

Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.

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.

Turning

30

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, paling, stakes posts, rails, crossarms, crossties, piers, HOUSING GENERAL, beams, flooring, parquet, frames, steps, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, PACKING, heavy packing, CONTAINERS, cooperage, 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)
Paling Fence Pickets
  • 4 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas da bicuiba
Stake Posts
  • 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
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
Flooring
  • 14 - Handbook of Hardwoods
Parquet
  • 15 - Empire Timbers
Frames
  • 16 - Woods of the World
Steps
  • 17 - Tree Conservation Database
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Decorative veneer
  • 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Turning
  • 30 - Embassy of Honduras in Japan
Ornaments
  • 31 - Embassy of Colombia in Japan
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Heavy Packing
  • 47 - Arvores Brasileiras
Cooperage
  • 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Truck Body
  • 53 - Timbers of the New World
Truck Flooring
  • 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods

Please Provide Information To View Producer Information

* Or, continue as guest