Log Description

Family Leguminosae (Fabaceae)
Botanical Names Hymenolobium excelsum
Continent Latin America
CITES (Washington convention of 2017)
No trade Restrictions
Diameter 70 – 120 cm
Thickness of Sapwood 3 – 5 cm
Buoyancy Does not float
Log Conservation Moderate (Treatment recommended)

Wood Description

Reference colour Sapwood Texture Grain Interlocked grain Notes
orange yellow Not clearly demarcated Coarse Interlocked grain slight yellow brown becoming pinkish Brown on exposure. Fairly important waxen patches frequent.

Flat Sawn

Quarter Sawn

Physical and Mechanical properties

Property Mean Value
Density* 0.80
Monnin hardness* 6.3
Coefficient of volumetric shrinkage 0.67% per %
Total tangential shrinkage (Ts) 8.3%
Total Radial shrinkage (Rs) 4.9%
T/R anisotropy ratio 1.7
Fibre Saturation point 25%
Thermal conductivity 0.26 W/(m.K.)
Lower heating value 19,050 kJ/kg
Crushing strength* 67 MPa
Static bending strength* 119 MPa
Longitudinal modulus elasticity* 20,870 MPa
* At 12% moisture content, with 1Mpa = 1N/mm2

Natural durability & Treatability

Resistance to decay Class 3 - moderately durable
Resistance to dry wood borers Class S – Susceptible (risk in all the wood)
Resistance to termites Class S – Susceptible
Treatability Class 2 – Moderately permeable
Use class covered by natural durability Class 2 - inside or under cover (dampness possible)


Resistance to decay moderate to good according to the species

Preservation Treatment

Against dry wood borer attacks. This wood requires appropriate preservative treatment.
In case of temporary humidification This wood requires appropriate preservative treatment.
In case of permanent humidification Use of this wood is not recommended.

Sawing and Machining

Blunting effect Normal
Tooth for sawing ordinary or alloy steel
Machining tools Ordinary
Suitability for peeling Bad
Suitability for slicing good
Notes Possible sawing and machining difficulties if the waxen patches are numerous. These patches remain visible after machining.


Drying rate rapid to norma
Risk of distortion Slight risk
Risk of case hardening No known specific 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 end checks when 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 Buchenavia fanshawei

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 "Saint Martin Jaune". Grading is done according to local rules "Bois guyanais classes (1990)". Possible grading: Choice 1, choice 2, 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), strength class D40 can be provided by visual grading.

Main End uses

  • Interior joinery
  • Exterior joinery
  • Current furniture or furniture components
  • Stairs (inside)
  • Industrial or heavy flooring
  • Sliced veneer
  • Interior panelling
  • Exterior panelling
  • Moulding
  • Heavy carpentry
  • Flooring


Extensive sanding is needed to obtain a good finish.