Log Description

Family Leguminosae (Caesalpiniaceae)
Botanical Names Dicorynia guianensis Amshoff
Dicorynia paraensis Benth.
Continent Latin America
CITES (Washington convention of 2017)
No trade Restrictions
Diameter 50 to 90 cm
Thickness of Sapwood 2 – 10 cm
Buoyancy Does not float
Log Conservation Moderate (treatment recommended)

Wood Description

Reference colour Sapwood Texture Grain Interlocked grain Notes
Brown Clearly demarcated Medium Straight Absent Colour turns bronze brown or purplish brown with air. Sometimes, presence of internal stresses.

Flat Sawn

Quarter Sawn

Physical and Mechanical properties

Property Mean Value
Density* 0.79
Monnin hardness* 5.7
Coefficient of volumetric shrinkage 0.55 % per %
Total tangential shrinkage (Ts) 8.2 %
Total Radial shrinkage (Rs) 5.1 %
T/R anisotropy ratio 1.6
Fibre Saturation point 29 %
Thermal conductivity 0.26 W/(m.K)
Lower heating value 19,200 kJ/kg
Crushing strength* 70 MPa
Static bending strength* 121 MPa
Longitudinal modulus elasticity* 18,350 MPa
* At 12% moisture content, with 1Mpa = 1N/mm2

Natural durability & Treatability

Resistance to decay Class 2 - durable
Resistance to dry wood borers Class D - durable (sapwood demarcated, risk limited to sapwood)
Resistance to termites Class M - non-treatable
Treatability Class 4 – non-treatable
Use class covered by natural durability Class 3 - not in ground contact, outside


This species is listed in the NF EN 350 standard. Resistance to decay: moderate to good depending on decay. This species does not cover the use class 4, but it naturally covers the use class 5 (wood permanently or regularly submerged in salt water, sea water or brackish water) owing to its high silica content and its high specific gravity. Resistance to termites ranges from moderately good to good. According to the European standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used.

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 Use of this wood is not recommended

Sawing and Machining

Blunting effect High
Tooth for sawing Stellite-tipped
Machining tools Tungsten carbide
Suitability for peeling Good
Suitability for slicing Good
Notes Sawdust may cause allergies


Drying rate Normal to slow
Risk of distortion Slight risk
Risk of case hardening Yes
Risk of checking Slight risk
Risk of collapse No known specific risk
Notes Slow drying recommended in order to reduce risks of checking and distorsion. Risks of casehardening with thick material.
Suggested drying schedule Schedule #6


Nailing/ Screwing Good but pre – boring necessary.
Notes Must be sawn green in order to reduce blunting effect. Sawing requires power and a cutting angle of 20° is recommended.

Cross sections of Buchenavia fanshawei

Commercial Grading

Sawn timber appearance grading

According to NHLA grading rules (2015) Possible grading: FAS, Select, Common 1, Common 2, Common 3 Grading is done according to local rules «Bois guyanais classés” (1990). Possible grading: Choice 1, choice 2, choice 3, choice 4

Fire Safety

Conventional French grading Thickness > 14 mm: M3 (moderately flammable)
Thickness < 14 mm: M4 (readily flammable)
Euroclass grading 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 a minimal thickness of 22 mm. Assigned according to procedures of the European standard NF EN 13501-1. Relevant European grading report N°RA05-0238D prepared by CSTB.

Visual structure grading

According to European standard EN 1912 (2012) and associated national standards (see explanatory note), strength class D24 can be provided by visual grading. For Guyana Teak from French Guiana, strength class D50 can also be provided by visual grading according to French standard NF B 52-001-1 (2011).

Main End uses

  • Turned goods
  • Heavy carpentary
  • Ship building (planking and deck)
  • Industrial or heavy flooring
  • Decking
  • Bridges (parts in contact with water or ground)
  • Cooperage
  • Exterior joinery
  • Interior joinery
  • Hydraulic works (fresh water)
  • Hydraulic works (seawater)
  • Sleepers