Turraeanthus Africanus (Avodire)


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Scientific Name
Turraeanthus africanus

Trade Name
Avodire

Family Name
Meliaceae

Synonyms
Turraeanthus malchiri, Turraeanthus vignei, Turraeanthus zenkeri, Bingeria africana

Common Names
Adoma, African furniture wood, African satinwood, Agbe, Agbouain, Agboue, Agboui, Aneadwen, Aniadwen, Anyadwe, Apapaye, Apata, Apaya, Apeya, Appayia, Assama, Avodere, Avodire, Blimah-pu, Blimahpu, Duabedom, Engan, Enyaadwene, Esu, Gakrada, Guaso, Gyakrada, Hadwe, Hague, Hakue, Kakne, Kisanda, Kwadwema, Lusamba, M’fube, Oduma, Olon, Songo, Sunkroasu, Wansenwa, White mahohany, Wogya, Wonzanwa

Regions of Distribution
Africa

Countries of Distribution  [VIEW MAP]
Angola, Benin, Cameroon, Congo, Equatorial Guinea, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Uganda, Zaire

Common Uses
Boat building (general), Boxes and crates, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Cooperages, Core Stock, Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Drum sticks, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Joinery, Kitchen cabinets, Light construction, Living-room suites, Millwork, Moldings, Musical instruments , Office furniture, Organ pipes, Paneling, Particleboard, Piano keys, Pianos , Plain veneer, Plywood, Pulp/Paper products, Radio – stereo – TV cabinets, Rustic furniture, Sounding boards, Stools, Tables , Utility furniture, Vats, Vehicle parts, Veneer, Veneer: decorative, Violin bows, Violin, Wardrobes, Xylophones

Environmental Profile

Abundant/Secure
Vulnerable in parts of its natural habitat
Status unknown in some areas due to inadequate information
Secure in many areas of its range
May be rare in parts of its range, especially at the periphery
Data source is World Conservation Monitoring Center

Vulnerable in the Ivory Coast. Rare in Uganda. Status unknown due to insufficient information in Angola, Benin, Equatorial Guinea, Ghana, Nigeria, Sierra Leone and Zaire

Distribution Overview
Avodire is distributed in tropical Africa, from Sierra Leone to the Congo region and Angola, and is most common in the eastern region of Ivory Coast. It is usually found in dense stands in rain forests, alongside lakes and streams.

Heartwood Color

Brown
Red
Yellow to golden-yellow to orange
White to cream
Pale yellow
Pale brown
Darkens after prolonged exposure

The wood is described as very attractive, with a golden yellow cast and a clear grain, and is similar in appearance to Primavera (Cybistax=Tabebuia donnell-smithii ).

Sapwood Color

Brown
Red
Same as heartwood
Color not distinct from heartwood

Though the sapwood is occasionally marked by staining fungi, there is little or no distinction between sapwood and heartwood.

Grain

Figure
Interlocked
Distinct (figure)
Wavy
Straight
Mottled (figure)
Closed
Even

 

Interlocked
Wavy
Straight
Distinct figure
Mottled figure
Distinct and very fine figure

Wavy or irregularly interlocked grain produces a highly attractive figures such as, striped, mottled, and curled. The wood is also reported to have what is described as a robe grain. Figured material is very popular for quarter cut decorative veneers, and plain, straight-grained wood is generally favored for plywood and high class joinery

Texture

Fine
Medium
Fine to medium

Texture has been compared to that of mahogany.

Luster

Lustrous
Pronounced
High

The wood has a high natural luster which has also been compared to that of the mahoganies.

Natural Growth Defects

Brittleheart is often frequent and extensive
Gum and mineral deposits

The wood may contain some brittleheart and interior gall pockets.

Natural Durability

Non durable
Heartwood is susceptible to wood staining fungal attack
Perishable
Susceptible to attack from termites (Isoptera)
Resistant to attack from powder post (Lyctid & Bostrychid) beetles
Susceptible to marine borer attack
Susceptible to attack from powder post (Lyctid & Bostrychid) beetles
Susceptible to attack by pinhole borers
Susceptible to attack by marine borers
Susceptible to attack by blue stain fungi and termites
Sapwood is susceptible to wood staining fungal attack
Pinworms (ambrosia beetles) are commonly present
Moderately resistant to termite (Isoptera) attack
Moderately resistant to attack by termites
Heartwood has low resistance to attack by fungi and other wood destroying insects

Odor

No specific smell or taste

Light-Induced Color Change

Darker

Toxicity

Dermatitic effects
Unspecified toxicity

Irritant substances in the wood have been associated with nose bleeding, dermatitis, and internal bleeding in some individuals.

Kiln Schedules

Drying (speed) is fast
UK=E US=T6D2/T3D1 Fr=5
T6 – D2 (4/4); T3 – D1 (8/4) US
Schedule E (4/4) United Kingdom
Kiln Drying Rate (in days) is fairly rapid

Drying Defects

Slight twist/warp
Slight cupping
Moderate twist/warp
Moderate end spitting
May warp, cup and split if not dried carefully
Existing shakes may open up

Slight end splitting
Existing shakes or end-checks are liable to extend, and splits may also occur in and around knots

Ease of Drying

Easy
Use care to avoid degrade
Dries easily and rapidly
Difficult

Kiln Drying Rate

Fairly rapid (11-17 days for boards under 32 mm, to 31-51 days for boards greater than 63 mm)

Tree Identification

Bole/stem form is misshapen
Bole/stem form is fluted
Bole/stem form is not buttressed
Bole/stem form is buttressed

Tree Size

Tree height is 20-30 m

Product Sources
The ITTO reports that timber from this species is produced regularly but in low quantities and is exported regularly.

The material is exported from the Ivory Coast to the world market in log form. Quantities are low and price is usually in the moderate range. The price of Avodire varies with grade and type of grain in the veneer. Avodire veneer of architectural grade is in the moderate price range.

Comments
General finishing qualities are rated as good

Blunting Effect

Blunting effect on machining is slight
Slight dulling effect on cutting tools
Blunting effect on machining is moderate

Boring

Moderately easy

Interlocked and wavy grain may interfere with boring, but the material works fairly well with ordinary machine tools

Carving

Easy to carve

Slight dulling effect on cutting edges

Cutting Resistance

Saws well
Low resistance to cutting

Gluing

Easy to glue
Good gluing properties

Mortising

Responds well to machine tools in mortising operations

Sight blunting effect on cutting edges

Moulding
A French head is recommended for better results in moulding operations

Movement in Service

Small
Very stable after seasoning

Nailing

Difficult to nail
Easy to nail
Possible if prebored
Pre-boring recommended
Holds nails well

Planing

Special attention required
Responds well to most ordinary tools in machining operations
Planes to a poor finish
Difficult to plane

A reduced cutting angle of 20 degrees or less is recommended to prevent interlocked grain from picking up in planing operations

Resistance to Impregnation

Heartwood is extremely resistant
Sapwood is permeable
Heartwood is resistant
Heartwood is permeable
Heartwood is moderately resistant

Response to Hand Tools

Easy to machine
Variable qualities
Slight dulling effect on cutting edges
Responds well to hand tools
Moderate working qualities

The timber usually has interlocked or wavy grain

Routing & Recessing

Good in both routing and recessing.

Sanding

Good sanding properties

Screwing

Screwing yields good results
Good screwing properties
Easy to screw

Turning

Special attention required

Material containing interlocked or wavy grain may require a reduced cutting angle of 15 degrees for smooth, finished surfaces

Veneering Qualities

Easy to cut

Steam Bending

Very poor
Variable steam bending qualities
Poor

Painting

Good results

Painting qualities are good, but quartersawn surfaces may be uneven.

Polishing

Satisfactory results
Good results
Yields a shiny surface

Staining

Poor results
Finish is generally satisfactory
Stains well
Finish is generally good

There may be some unevenness on quartersawn surfaces.

Strength Properties

Max. crushing strength = medium
Shrinkage, Tangential = small
Density (dry weight) = 31-37 lbs/cu. ft.
Modulus of Elasticity (stiffness) = very low
Bending strength (MOR) = low
Shrinkage, Radial = very small
Bending strength (MOR) = medium
Shrinkage, Radial = small
Hardness (side grain) = medium
Bending strength (MOR) = high
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = moderate
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very high
Shearing strength (parallel to grain) = high
Hardness (side grain) = soft
Modulus of Elasticity (stiffness) = low
Max. crushing strength = high
Work to Maximum Load = very low
Shrinkage, Tangential = fairly large
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = medium
Density (dry weight) = 38-45 lbs/cu. ft.
Density (dry weight) = 23-30 lbs/cu. ft.
Bending strength (MOR) = very high

Avodire exhibits similar machining characteristics to those of the mahoganies since they are in the same botanical family. It is also reported to have almost the same strength properties as English oak (Quercus ), although it is about 15 percent lighter. The wood is slightly better to work with than Primavera. It is rated as medium in crushing and bending strengths, and low in shock resistance and stiffness. Hardness is rated as medium, weight is about average, and it has high density. Timber produced by the species is often mixed and marketed with that ofTurreanthus vignei .

Numerical Data

Item Green Dry English
Bending Strength 9351 13712 psi
Density 34 lbs/ft3
Hardness 1250 lbs
Impact Strength 26 inches
Maximum Crushing Strength 4289 7065 psi
Shearing Strength 2403 psi
Stiffness 1119 1413 1000 psi
Work to Maximum Load 5 8 inch-lbs/in3
Specific Gravity 0.47 0.53
Weight 36 32 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 6 %
Volumetric Shrinkage 12 %
Item Green Dry Metric
Bending Strength 657 964 kg/cm2
Density 544 kg/m3
Hardness 567 kg
Impact Strength 65 cm
Maximum Crushing Strength 301 496 kg/cm2
Shearing Strength 168 kg/cm2
Stiffness 78 99 1000 kg/cm2
Work to Maximum Load 0.35 0.56 cm-kg/cm3
Specific Gravity 0.47 0.53
Weight 576 512 kg/m3
Radial Shrinkage 4 %
Tangential Shrinkage 6 %

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