Koto

Scientific name: Pterygota bequaertii De Wild

Geographic origin: West Africa and Central Africa

Description

  • Sapwood and Heartwood: white or cream-colour to yellowish white
  • Fiber: Straight, Slightly intertwined fibers are very frequent.
  • Grain: medium size to rough

Capacity of being impregnated

  • Capable of being impregnated

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

Koto

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

Koto

Observations

Koto