ASSAS (Bridelia grandis)
Trade Name
Assas
Scientific Name
Bridelia grandis Pierre
Family
EUPHORBIACEAE
Common Names
Tekbe (Côte d`Ivoire); Tchikuibi (Côte d`Ivoire); Tchikouebi (Côte d`Ivoire); Assas (Côte d`Ivoire); Assas (Gabon); Assas
Scientific Name Synonyms
Bridelia aubrevillei Pellegr.
Description Of The Tree
Botanical Description
The tree reaches a height of 32 m. The bole is sometimes 20 m long, nearly cylindrical, but not always straight. It presents small buttresses and short stilt roots or aerial roots at base. The trunk diameter attains 70 cm.
Natural Habitat
Bridelia grandis occurs in high closed forests, and secondary formations.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels in radial multiples of 2 to 4. Tangential diameter of vessel lumina 100 to 150 micras (small). Tyloses thin walled. Vestured pits. Vessels per mm2 6 to 10 (medium). Reticulate, foraminate and/or other types of multiple perforation p Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Heterogeneous rays and/or multiseriate heterogeneous rays. Septate fibers present. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is grey-brown or brown, it is not clearly demarcated.
Grain
It has highly interlocked grain; special care is needed when drying because of frequent risks of distortion.
Texture
Fine texture is reported in this species.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
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
Drying Defects
Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks and distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
951
Stiffness (MOE) 12%MC (kgf/cm²)
133923
Compression parallel to fiber 12%MC (kgf/cm²)
587
Compression perpendicular to fiber 12%MC (kgf/cm²)
77
Janka hardness (side) 12%MC (kgf)
429
Janka hardness (end grain) 12%MC (kgf)
533
Workability
Sawing
It is easy to saw.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Slight blunting effect; ordinary tools can be used for sawing and machining.
Machining
Machining of this species is reportedly easy.
Planing
Easy; no particular problems.
Moulding
Easy; no particular problems.
Turning
30
Boring
Easy; no particular problems.
Mortising
Easy; no particular problems.
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, flooring, fittings, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, cores, TURNING, TOOLS, tool handles, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts, scale model
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Fittings
- 19 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Cores
- 27 - Embassy of Brazil in Japan
Turning
- 30 - Embassy of Honduras in Japan
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Scale Models
- 83 - Algunas caracteristicas fisicomecanicas de la madera de tres especies de la cordillera NeoVolcanica
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