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TANI (Cryptosepalum staudtii)
Trade Name
Tani
Scientific Name
Cryptosepalum staudtii Harms
Family
LEGUMINOSAE
Common Names
Ekop-tani (Cameroon)
Scientific Name Synonyms
Cryptosepalum exfoliatum De Wild.
Description Of The Tree
Botanical Description
The tree reaches a height of 26 m. The bole is slender, straight, cylindrical and unbuttressed. The trunk diameter attains 100 to 140 cm.
Natural Habitat
Cryptosepalum staudtii occurs in rain forests and along riverbanks.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Prismatic crystals in short chains in chambered axial parenchyma cells. Rays more than 10 per mm (abundant). Rays non-storied. Rays 1 to 4 seriate. 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.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is greyish white. The heartwood is light brown with an occasional sheen, it is not clearly demarcated.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
Wavy or slightly interlocked; special care is needed when machining in order to obtain satisfying quality surface.
Texture
The wood is reported to be frequently medium textured.
Luster
The wood surface 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
No residual growth stresses are found.
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)
0.80
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.92
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.9
Total shrinkage Radial (Saturated to 0%MC) (%)
5.5
Drying Defects
Ease of Drying: Dries fairly rapidly with little degrade. Drying Defects: Slight end-splitting and distortion may occur.
Recommended Dry Kiln Schedule
FR-12
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.8
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1451
Stiffness (MOE) 12%MC (kgf/cm²)
202736
Compression parallel to fiber 12%MC (kgf/cm²)
793
Compression perpendicular to fiber 12%MC (kgf/cm²)
115
Shear strength radial 12%MC (kgf/cm²)
120
Janka hardness (side) 12%MC (kgf)
1063
Janka hardness (end grain) 12%MC (kgf)
1098
Workability
Sawing
Sawing of this species requires powerful equipment.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Machining
It needs powerful tools for processing. 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
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, HOUSING GENERAL, beams, joists, steps, FURNITURE AND CABINETS, common furniture, TURNING, turned furniture, TOOLS, agricultural tools, CONTAINERS, truck bodies, truck flooring, OTHER AND MUSICAL INSTRUMENTS, handicrafts, axle, yoke
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
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Joists
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Steps
- 17 - Tree Conservation Database
Furniture, Common
- 23 - Handbook of Hardwoods
Turning
- 30 - Embassy of Honduras in Japan
Turned Articles
- 32 - Embassy of Cote d`Ivoire in Japan
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Agricultural Tools
- 44 - Atlas of Peruvian Woods
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Axles
- 73 - Handbook of Hardwoods
Yokes
- 74 - World Timbers, Vol.2, North and South America
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