Gabarro

Jatoba

Scientific name: Hymenaea spp

Geographic origin: South America, the Caribbean and the West Indies

Jatoba
Description

Sapwood: Pink white.
Heartwood: Pink grey to reddish grey.
Fiber: Straight, occasionally slightly intertwined.
Grain: Thin to medium size
Characteristic defects: Growth tensions and petrean inlays

Capacity of being impregnated

  • Sapwood: Medium capacity of being impregnated
  • Heartwood: Low capacity of being impregnated

Mechanization

  • Sawing process: ordinary difficulties arise from hardness and low abrasability
  • Drying process: Medium to high speed. Low risk of deformation and crack formation.
  • Planing process: Difficulties due to hardness, abrasability and risk of repelling on pieces of intertwined fibers. Slow mechanisation is recommended
  • Gluing process: Tannins hamper proper adherence
  • Nailing and screwing process: pre-drilling is recommended due to hardness
  • Finish: no particular problems arise

Physical properties

  • Apparent density at 12% humidity
  • 950 kg/m3 very heavy wood
  • Dimensional stability
  • - Volumetric contraction coefficient
  • 0.43 % variation from stable wood to nervous wood
  • - Relation between contractions
  • 1.9% tendency to deformity
  • Hardness (Chaláis-Meudon) 8.5 very hard wood

Jatoba
Mechanical properties

  • Resistance to static flexion 1,338 kg/cm2 &;8226; Elasticity module 180,000 kg/cm2
  • Resistance to compression 750 kg/cm2

Jatoba
Observations

Jatoba