Cumaru technical informations

CUMARU - Dypterix spp - Family : Fabaceae

ORIGIN
Central and South America


COMMERCIAL NAME
Brasil : Cumaru,Cumaru ferro, Champanha, Cumarurana
Bolivia : Almendrillo
French Guyana : Gaiac de Cayenne, Tonka


WOOD DESCRIPTION
Aubier : Yellow, white
Wood : perfect
Color : Yellow to brown to red brown
Cross-grain : Present
Grain : average
Maillure : Shelf structure


TECHNOLOGY
Volumetric mass in the green state ( kg / m3) : 1200
Volumetric mass at 12% ( kg/ m3 ) ( très lourd ) : 1070
Complete linear tenganciel collection ( T % ) : 7.9
Pressure of break in axial compression12 % ( N / mm2 ) : 105
Pressure of break in the static inflection 12 % ( N / mm2 ) : 199
Module of stretch 12 % ( N/ mm2 ) : 22000


MANUFACTURING AND TRANSFORMATION
Power sawing : Need of high power
Drying : Carefully - risk of distortion
Machining : With special tool because of cross-grain
Pasting : With care
Nailing : Necessary pre-hole
Finised product : Good


NATURAL DURABILITY
Natural durability to mushrooms : Very good
Natural durability to white ants : Very good
Natural durability to dry wood insects : Good
Impregnability : Bad


WHERE TO USE IT
Hydrolical construction
Port
Very heavy construction
Very heavy framework
Filming Plating
Gears
 
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