Log Description

Family Moraceae
Botanical Names Eperua rubiginosa
Continent Latin America
CITES (Washington convention of 2017)
No trade Restrictions
Diameter 40 to 70 cm
Thickness of Sapwood 4 – 6 cm
Buoyancy Does not float
Log Conservation Good

Wood Description

Reference colour Sapwood Texture Grain Interlocked grain Notes
Red brown Clearly demarcated Medium Straight Absent Wood red brown to dark brown with lighter veins. Very pronounced internal stresses. Presence of resin veins Unpleasant odour when green.

Flat Sawn

Quarter Sawn

Physical and Mechanical properties

Property Mean Value
Density* 0.88
Monnin hardness* 7.0
Coefficient of volumetric shrinkage 0.42 % per %
Total tangential shrinkage (Ts) 6.5 %
Total Radial shrinkage (Rs) 2.3 %
T/R anisotropy ratio 2.8
Fibre Saturation point 29 %
Thermal conductivity 0.29 W/(m.K.)
Lower heating value 19, 720 kJ/kg
Crushing strength* 72 MPa
Static bending strength* 120 MPa
Longitudinal modulus elasticity* 18, 450 MPa
* At 12% moisture content, with 1Mpa = 1N/mm2

Natural durability & Treatability

Resistance to decay Class 1 – very durable
Resistance to dry wood borers Class D – durable (sapwood demarcated, risk limited sapwood)
Resistance to termites Class D – Durable
Treatability Class 4 – non-treatable
Use class covered by natural durability Class 4 –in ground or fresh water contact


This species is listed in the NF EN 350 standard. Natural durability classes and use class mentioned are those of Eperua falcata. Eperua grandiflora and Eperua rubiginosa have a poorer durability. According to the European standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used. This species naturally covers the use class 5 (wood permanently or regularly submerged in salt water, sea water or brackish water) due to its high density.

Preservation Treatment

Against dry wood borer attacks. This wood does not require any preservation treatment.
In case of temporary humidification This wood does not require any preservation treatment
In case of permanent humidification This wood does not require any preservation treatment

Sawing and Machining

Blunting effect Fairly high
Tooth for sawing Stellite tipped
Machining tools Tungsten carbide
Suitability for peeling Not recommended or without interest
Suitability for slicing Not recommended or without interest
Notes Sawing and machining requires powerful equipment. Resin may clog saw teeth of saws and cutters. Resin exudations are no more problematic on dry wood. Internal stresses released limits yield with sawing.


Drying rate Slow
Risk of distortion No specific risk
Risk of case hardening High risk
Risk of checking Slight risk
Risk of collapse No known specific risk
Suggested drying schedule Schedule # 6


Nailing/ Screwing Good but pre – boring necessary.
Notes Tends to split with nailing. High specific gravity: important that gluing be performed in compliance with the code of practice and instructions for the glue used.

Cross sections of Eperua rubiginosa

Commercial Grading

Sawn timber appearance grading

According to NHLA grading rules (2015) Possible grading: FAS, Select, Common 1, Common 2, Common 3. In French Guiana, the local name of this species is "Wapa". Grading is done according to local rules "Bois guyanais classés". Possible grading: Choice 1, choice2, choice 3, choice 4

Fire Safety

Conventional French grading Thickness > 14 mm: M3 (moderately inflammable)
Thickness < 14 mm: M4 (easily inflammable)
Euroclass grading D-s2, d0
Default grading for solid wood that meets requirements of European standard NF EN 14081-1 (April 2016): structural graded timber in vertical uses and ceilings with minimal mean density of 0.35 and minimal thickness of 22 mm.

Visual structure grading

According to French standard NF B 52- 001-1 (2011) and associated national standards, strengths classes D40 can be provided by visual grading.

Main End uses

  • Shingles
  • Heavy carpentary
  • Exterior joinery
  • Cooperage
  • Sleepers
  • Stakes
  • Decking
  • House framing
  • Poles


Careful sanding and filling are recommended