Doussie

Scientific name: Afzelia spp

Geographic origin: Africa

Description

  • Sapwood: yellowish white colour.
  • Heartwood: reddish brown.
  • Fiber: straight, occasionally slightly wavy.
  • Grain: medium size.

Capacity of being impregnated

  • Sapwood: medium capacity of being impregnated.
  • Heartwood: no capable of being impregnated.

Mechanization

  • Sawing process: ordinary difficulties due to hardness.
  • Drying process: quite slow. Low risk of deformation and crack formation.
  • Planing process: easy. Risk of repelling on intertwined fibers.
  • Gluing process: no difficulties.
  • Nailing and screwing process: pre-drilling is required due to hardness.
  • Finish: rubber deposits can locally hamper varnish adherence.

Physical properties

  • Apparent density at 12% humidity 790 kg/m3 heavy wood.
  • Dimensional stability
  • - Volumetric contraction coefficient 0.34% highly stable wood.
  • - Relation between contractions 1.4% no tendency to deformity.
  • Hardness (Chaláis-Meudon) 7.4 hardwood.

Doussie

Mechanical properties

  • Resistance to static flexion 1,730 kg/cm2 .
  • Elasticity module 137,000 kg/cm2.
  • Resistance to compression 740 kg/cm2.
  • Resistance to parallel traction 1,200 kg/cm2.

Doussie

Observations

It is recommened not to use the Sapwood.