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IGAGANGA (Dacryodes igaganga)
Trade Name
Igaganga
Scientific Name
Dacryodes igaganga Aubrev. et Pellegr.
Family
BURSERACEAE
Common Names
Igaganga (Gabon); Igaganga
Description Of The Tree
Botanical Description
The tree reaches a height of 40 to 46 m, with diameters of 100 cm. The bole is cylindrical, clear and straight with no buttresses.
Natural Habitat
Dacryodes igaganga is a timber species found in the lowland rain forests, generally in small groups.
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. Silica bodies in fibers. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is lighter in shade than the heartwood, it has a thickness of 2.5 to 4 cm. The heartwood is pink-buff, it is clearly demarcated.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
It has highly interlocked grain; special care is needed when drying because of frequent risks of distortion.
Texture
Texture is reported to be fine to medium.
Luster
This wood is commonly of low luster.
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 growth stresses are found.
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)
0.56
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.61
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.8
Total shrinkage Radial (Saturated to 0%MC) (%)
5.0
Drying Defects
Ease of Drying: Air seasoning is easy and very good with no appreciable degrade. Drying Defects: A slight tendency to check and warp and some liability to collapse have been reported. Fine surface checks may develop when drying thick boards. Kiln Schedules: Kiln drying proceeds without trouble.
Recommended Dry Kiln Schedule
FR-4
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.6
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
964
Stiffness (MOE) 12%MC (kgf/cm²)
133145
Compression parallel to fiber 12%MC (kgf/cm²)
580
Compression perpendicular to fiber 12%MC (kgf/cm²)
76
Shear strength radial 12%MC (kgf/cm²)
91
Janka hardness (side) 12%MC (kgf)
457
Janka hardness (end grain) 12%MC (kgf)
561
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
Moderately easy; tools must be cautiously sharpened.
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
No particular problem.
Gluing
Glues well if basic gluing technical rules are followed.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
No particular problems.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, TURNING, ornaments, turned furniture, cutlery, lasts, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings
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
Steps
- 17 - Tree Conservation Database
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Fittings
- 19 - Silica in Timbers
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
Turning
- 30 - Embassy of Honduras in Japan
Ornaments
- 31 - Embassy of Colombia in Japan
Turned Articles
- 32 - Embassy of Cote d`Ivoire in Japan
Knife Handles
- 33 - Embassy of Gabon in Japan
Lasts
- 34 - Embassy of Indonesia 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
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Door Cores
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Coffin
- 78 - Amazonian Timbers for the International Market
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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