Koto
Scientific name:
Pterygota bequaertii De Wild
Geographic origin:
West Africa and Central Africa
- Sapwood and Heartwood: white or cream-colour to yellowish white
- Fiber: Straight, Slightly intertwined fibers are very frequent.
- Grain: medium size to rough
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Capacity of being impregnated
- Capable of being impregnated
Mechanical properties
- Resistance to static flexion 1,000 kg/cm2 &;8226; Elasticity module 100,000 kg/cm2
- Resistance to compression 525 kg/cm2
- Resistance to parallel traction 900 kg/cm2
Mechanization
- Sawing process: No difficulties.
- Drying process: Medium speed. High risk of deformation and crack formation
- Planing process: No difficulties excepting risk of repelling on pieces of intertwined fibers
- Gluing process: No difficulties
- Nailing and screwing process: No difficulties.
- Finish: No difficulties
Physical properties
- Apparent density at 12% humidity
- 600 kg/m3 madera de semiligera a Heavy
- Dimensional stability
- - Volumetric contraction coefficient
- 0.52 % variation from nervous wood to very nervous wood
- - Relation between contractions
- 2.2% much tendency to deformity
- Hardness (Chaláis-Meudon) 2.3 Semi-softwood
Observations
