Cumaru

  • Dipterix spp
  • English: Cumaru
  • Central America and north of the Amazone.

Description

&;8226; Sapwood: white yellowish.
&;8226; Heartwood: brown yellowish to brown redish.
&;8226; Fiber: straight, usually quite cross.
&;8226; Grain: medium size.

Applications

&;8226; Interior carpentry, doors, stairs, paneling, molding, baseboad, friezes and specially parquet flooring.
&;8226; Exterior carpentry, doors and windows.
&;8226; Interior and exterior carpentry.
&;8226; Decorative panels.
&;8226; Cooperage.

Capacity of being impregnated

&;8226; Sapwood: medium capacity of being impregnated.
&;8226; Heartwood: low capacity of being impregnated.

Mechanization

&;8226; Sawing process: difficult due to its hardness and its silica content, high power saws are required.
&;8226; Drying process: very slow. Little risk of cimentation. High risk of crack formation and lower risk of deformations.
&;8226; Planing process: difficult due to its hardness, risk of generalized risk of repelling due to its intertwined fibers pieces. Slow mechanisation is highly recommended.
&;8226; Gluing process: difficulties can arise due to its tannin contents.
&;8226; Nailing and screwing process: difficulties due to its hardness. Pre-drilling is required.
&;8226; Finish: a thorough sanding is required due to the risk of repelling.

Physical properties

&;8226; Apparent density at 12% humidity 1,020 kg/m3 very heavy wood.
&;8226; Dimensional stability
- Volumetric contraction coefficient 0.49 % nervous wood.
- Relation between contractions 1.4% no tendency to deformity.
&;8226; Hardness (Chaláis-Meudon) 11.0 very hard wood .

Mechanical properties

&;8226; Resistance to static flexion 1.780 kg/cm2.
&;8226; Elasticity module 220,000 kg/cm2.
&;8226; Resistance to parallel compression 680 kg/cm2.

Observations

It is the South American wood that is more similar to the African Talí-Elondo. This wood is highly recommened for exterior deck and it is a good substitute to Ipe wood.


Aviso

Aviso