Angelique
| 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 |
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 |
Notes
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
| 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 |
Assembling
| 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