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OZIGO (Dacryodes buettneri)

Trade Name

Ozigo

Scientific Name

Dacryodes buettneri H.J.Lam

Family

BURSERACEAE

Common Names

Ozigo (Gabon); Assia (Equatorial Guinea); Tchibudimbu; Samveien; Safunkala; Ossamvegna; Osogho; Osighou; Nkala; N`sikou; Musiku; Mouzighou; Massikou; Essassia; Assa-mingoug; Assia (Germany); Assia (Gabon); Ozigo

Scientific Name Synonyms

Pachylobus ezigo Pierre Msc.; Pachylobus buettneri (Engl.) Engl.; Pachylobus buettneri (Engler) Engl.; Canarium buettneri Engl.

Description Of The Tree

Botanical Description

The tree reaches a height of 26 to 40 m, with diameters from 130 to 170 cm, normally not buttressed. The bole is usually straight and cylindrical.

Natural Habitat

Dacryodes buettneri is prevalent in rain forests as a dominant or codominant species.

Natural Distribution

West Africa.

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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). Tyloses thin walled. Non-vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits coars Paratracheal axial parenchyma scanty and/or vasicentric. 4 to 10 rays per mm (medium). Rays non-storied. Rays commonly 2 seriate. Silica bodies in the ray cells. Occasionally prismatic crystals in the ray cells. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Septate fibers present. Fibers with simple to minutely bordered pits.

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

Availability

Cites Status

Unrestricted

General Wood Description

Color

The sapwood is greyish white. The heartwood is pink white to pinkish grey, it is not clearly demarcated.

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

6

Grain

The grain is highly and systematically interlocked.

Texture

This wood has a somewhat medium texture.

Natural Durability

Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. Heartwood is sensible to Lyctus attacks.

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

5

Internal Growth Stresses

No residual stresses are reported in this species.

Silica Content

Silica Content: Silica is present. Amounts over 0.05% may affect wood processing. Silica Value: 0.26

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)

0.54

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

0.59

Total shrinkage Tangential (Saturated to 0%MC) (%)

7.3

Total shrinkage Radial (Saturated to 0%MC) (%)

5.2

Recommended Dry Kiln Schedule

FR-9

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

1.4

Wood Chemical Properties

Wood Mechanical Properties

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

931

Stiffness (MOE) 12%MC (kgf/cm²)

140897

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

533

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

68

Shear strength radial 12%MC (kgf/cm²)

74

Janka hardness (side) 12%MC (kgf)

424

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

529

Workability

Sawing

It is easy to saw.

Rotary Veneer Cutting

Suitable for peeling if treated.

Sliced Veneer

Suitable for peeling if treated.

Blunting Effect

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

Machining

Possible difficulties caused by interlocked grain are reported.

Planing

Easy; no particular problems.

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

No particular problem.

Gluing

Glues well if basic gluing technical rules are followed.

Sanding

Difficult to obtain very good results because of interlocked grain.

Polishing

Can be polished without surface preparation.

Response To Hand Tools

No particular problems.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, boards, flooring, parquet, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, heavy packing, pallets

General Housing
  • 10 - Silica in Timbers
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
Steps
  • 17 - Tree Conservation Database
Paneling
  • 18 - W3TROPICOS Missouri Botanical Garden
Fittings
  • 19 - Silica in Timbers
Shutter Boards
  • 20 - Prospect: The wood database
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Common
  • 23 - Handbook of Hardwoods
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Faces
  • 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Cores
  • 27 - Embassy of Brazil in Japan
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Heavy Packing
  • 47 - Arvores Brasileiras
Pallets
  • 48 - The strength properties of timbers

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