Cumaru

Scientific name: Dipteryx odorata

 

Other common names:

Baru, Cambaru, Cambaru-ferro, Catinga-de-boi, Champagne, Champanha, Combari, Coração-de-negro, Cumari, Cumaru, Cumaru-amarelo, Cumaru-da-folha-grande, Cumaru-de-cheiro, Cumaru-do-amazonas, Cumaru-escuro, Cumaru-ferro, Cumarurana, Cumaru-rosa, Cumaru-roxo, Cumaru-verdadeiro, Cumaruzeiro, Cumaruzinho, Cumbari, Cumbaru, Cumbaru-ferro, Cumbaru-roxo, Emburama-brava, Fava-tonca, Faveira-tonca, Ipê-cumaru, Kumbaru, Muimapajé, Muirapapé, Muirapayé, Paru, Sacupembinha, Sapucaia, Sucupira, Sucupiramirim.

 

Tree:

Commercial height: 8.80m; Diameter: (DBH) 49.8cm; (DAB) 60.2cm; Trunk: straight/tortuous; Buttress: from low to 2,40cm.

 

General characteristics:

Heartwood/sapwood: distinct;

Thickness of sapwood: 2.0cm to 6.0cm;

Heartwood color: brown (7.5YR 5/4);

Sapwood color: very pale brown (10YR 7/4);

Growth rings: distinct;

Grain: interlocked;

Texture: medium to fine;

Tangential figure: caused by prominent vascular lines;

Radial figure: in narrow longitudinal bands, caused by growth rings;

Luster: lacking; Odor: indistinct;

Resistance to manual cross-cutting: hard.

 

Preservation:

The heartwood is untreatable with creosote (oil-borne) or CCA (water borne).

 

Kiln drying:

Rapid (6.0 days) with medium warping Schedule used: SEVERE.

 

Workability/end-uses:

End-Uses: Heavy construction, light construction, boats, turnery, and paneling.

 

Images

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Phisical Properties:

 

Density(g/cm3)				Shrinkage (%)			Shrinkage Tangential/ Shrinkage Radial
Dry	Green	Basic	12%	Tangential	Radial	Volumetric
1.06	1.28	0.91		8.40	5.40	13.50	1.56

 

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	1364	162	693	160	1292	1393
Dry	1764	183	987	210	1339	1601

 

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	64	93	169
Dry	49	87	224

 

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