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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.
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.
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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