Tauari

Scientific name: Couratari guianensis

 

Other common names:

Caçador, Cachimbeiro, Maou, Tauari, Tauari-branco, Tauari-claro.

 

Tree:

Commercial height (m): min. 8.0 - mean 14.5 - max. 25.0; Diameter (DAB) (cm): min. 50 - mean 60 - max. 74; Trunk: straight, cylindrical; Bark: thickness (cm) 1.0 - 1.5 (fissured); Buttresses: up to 6 m.

 

General characteristics:

Heartwood/Sapwood: indistinct;

Color: yellowish white;

Growth rings: not sharply demarcated;

Grain: straight;

Texture: medium;

Figure: lacking;

Luster: faint;

Green weight (kg/m3): 1110;

Basic specific gravity (g/cm3): 0.52.

 

Preservation:

Ease: group I; Retention (kg/m3): min. 320 - mean 400 - max. 497; Penetration: total uniform.

 

Kiln drying:

Rate: very fast (days) 3; Defects: slight tendency to check, twist and caseharden; Shrinkage (%): vol. 10.4 - tang. 6.1 - rad. 3.6.

 

Workability/end-uses:

Sawing: easy; Planing: easy, finishes to smooth surfaces.

 

Phisical Properties:

 

Density(g/cm3)				Shrinkage (%)			Shrinkage Tangential/ Shrinkage Radial
Dry	Green	Basic	12%	Tangential	Radial	Volumetric
	1.11	0.52		6.10	3.60	10.40	1.69

 

Images

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Mechanical Properties:

 

State	Static Bending		Compression		Janka Hardness
	Modulus of rupture (kgf/cm2)	Modulus of elasticity (1.000kgf/cm2)	Parallel to the grain	Perpendicular to the grain	Parallel to the grain (kgf)	End to the grain (kgf)
			Maximum compression (kgf/cm2)	Stress at proportional limit (kgf/cm2)
Green	685	94	324	58	481	429
Dry	1061	117	550	79	665	516

 

State	Tension	Cleavage strenght	Shear	Nail extration
	Perpendicular to the grain	Maximum compression (kgf/cm)	Maximum compression (kgf/cm)	Parallel to the grain (kgf)	End to the grain (kgf)
	Maximum compression (kgf/cm2)
Green	52		83
Dry	42		104

 

Source: Laboratory of Forest Products - IBAMA-Brasília-Brazil