::Doussie Lingue::

France

Common name:

DOUSSIE

Family:

CAESALPINIACEAE

Scientific name(s): Afzelia africana

Afzelia bella

Afzelia bipindensis

Afzelia pachyloba

 
 
 
LOG DESCRIPTION WOOD DESCRIPTION
Diameter:

from to cm

60  90

Colour:

Red brown

Thickness of sapwood:

from to cm

2
Sapwood:

Clearly demarcated

Floats:

no

Texture:

Coarse

Durability in forest :

Good

Grain:

Straight or interlocked

 

Interlocked grain:

Slight

Note:

Wood golden brown to light red brown, sometimes with darker veins. Afzelia bipidensis can

often be identified by the presence of yellow powder at the heart.

PHYSICAL PROPERTIES

MECHANICAL PROPERTIES

Physical and mechanical properties are based on mature heartwood specimens. These properties can vary greatly depending on

origin and growth conditions
  mean standard deviation  mean standard deviation    mean standard deviation  mean standard deviation 

Density *:

0.80

0.06

Crushing strength *:

74

MPa

10

Monnin hardness*:

7.7

1.6

Static bending strength *:

124

MPa

23

Coef of volumetric shrinkage:

0.44

%

0.10

Modulus of elasticity *:

17020

MPa

2889

Total tangential shrinkage:

4.4

%

0.7

Fibre saturation point: 19 %  
Total radial shrinkage:

3.0

%

0.5

Stability:

stable

( * : at 12 % moisture content ; 1 MPa = 1 N/mm2 )

NATURAL DURABILITY AND TREATABILITY

Fungi and termite resistance refers to end-uses under temperate climate.

Except for special comments on sapwood, natural durability is based on mature heartwood.

Sapwood must always be considered as non-durable against wood degrading agents.

Fungi: Class 1 - very durable

* ensured by natural

durability (according

EN standards).

Dry wood borers:

Durable; sapwood demarcated (risk limited to sapwood)

Termites:

Class D - Durable

Treatability:

4 - not permeable

Use class*: 4 - in ground or fresh water contact

This species is listed in the European standard NF EN 350-2.

Note:

According to the European standard NF EN 335, performance length might be modified by the

intensity of end-use exposition.

MAIN LOCAL NAMES

Countries
Local names
Angola N'KOKONGO
Tanzania MKORA
Angola UVALA
Germany AFZELIA
Benin KPAKPATIN
Portugal CHANFUTA
Benin PAKPAJIDE
United Kingdom AFZELIA
Cameroon DOUSSIE
Cameroon M'BANGA
Côte d'Ivoire AZODAU
Côte d'Ivoire LINGUE
Dem Rep of Congo BOLENGU
Ghana PAPAO
Guinea-Bissau PAU CONTA
Mozambique CHANFUTA
Mozambique MUSSACOSSA
Nigeria APA IGBO
Senegal LINGUE
Sierra Leone KPENDEI
Tanzania MBEMBAKOFI

DOUSSIE

REQUIREMENT OF A PRESERVATIVE TREATMENT

Against dry wood borer attacks:

Does not require any preservative treatment

In case of temporary humidification risk :

Does not require any preservative treatment

In case of permanent humidification risk

Does not require any preservative treatment

DRYING

Possible drying schedule

30 42 41 94

25 42 39 82

20 48 43 74

15 48 43 74

Drying rate:

Slow

Temperature (°C)

dry-bulb

Risk of distortion:

Slight risk

Air

humidity (%)

wet-bulb
Risk of casehardening:

No

M.C.  (%)

 

Risk of checking:

Slight risk

 

Risk of collapse:

No

This schedule is given for information only and is applicable to thickness < 38 mm.

It must be used in compliance with the code of practice.

For thickness from 38 to 75 mm , the air relative humidity should be increased by 5 % at each step.

For thickness over 75 mm , a 10 % increase should be considered.

Note:

Difficulties in extracting moisture from the heart of pieces. Slow drying necessary (3 to 5

months).

SAWING AND MACHINING

Blunting effect:

Fairly high

Sawteeth recommended:

Stellite-tipped

Cutting tools:

Tungsten carbide

Peeling:

Not recommended or without interest

Slicing:

Good

Note:

Peeling recommended only for decorative veneer. Sawdust may cause irritations. Some

difficulties due to interlocked grain (tearing).

ASSEMBLING

Nailing / Screwing:

Good but pre-boring necessary

Gluing:

Correct (for interior only)

Note:

Tends to split when nailing. Gluing may be difficult due to the presence of wood extractives

END-USES

Main known end-uses; they must to be implemented according to the code of practice.

Important remark: some end-uses are mentionned for information (traditional, regional or ancient end-uses).

Note:

Yellow powder often visible in areas near the heart contain substances that might hinder varnish

drying.

Filling is recommended to obtain a good finish

Ship building (ribs)

Bridges (parts in contact with water or ground)

Ship building (planking and deck)

Sliced veneer

Exterior joinery

Interior joinery

Stairs (inside)

Flooring

Bridges (parts not in contact with water or ground)

Interior panelling

Exterior panelling

Cabinetwork (high class furniture)

Current furniture or furniture components

Cooperage

Industrial or heavy flooring

Heavy carpentry

Wood frame house

Shingles

Resistant to one or several acids



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