MOABI (Baillonella toxisperma)

Nom commercial

Moabi

Nom scientifique (avec auteur)

Baillonella toxisperma Pierre

Famille

SAPOTACEAE

Noms communs (pays)

M'foi (Gabon); Adjap (Equatorial Guinea); Moabi (Congo); Adjap (Cameroon); Moabi (Angola); Ulumba; Orere; Nyabi; Ngulube; Nduku wa dijondo; Mwabi; Muyabi; Mudia; Muabi; Kungulu; Djave; Cungulo; Adjap; African pearwood (United Kingdom); Muamba jaune (Zaire); M`foi (Gabon); Dimpampi (Congo); Ayap (Equatorial Guinea); Ayap (Cameroon); Adza (Gabon); Njabi (Cameroon); Njabi (Nigeria); Moabi

Synonymes du nom scientifique (avec auteurs)

Mimusops obovata Pierre ex Engl.; Mimusops djave (Laness.) Engl.; Bassia djave Laness.; Baillonella djave Pierre

DESCRIPTION DE L'ARBRE

Description botanique

The tree reaches a height of more than 50 m with straight cylindrical boles to 32 m in length. The trunk diameter attains up to 200 cm, sometimes even reaching more than 300 cm. Butt swelling is reported in older trees. Log is banned for international tra

Habitat naturel

Baillonella toxisperma is found in primary evergreen and old secondary rainforest, often in small patches on dry or moist soils.

Répartition naturelle

Found in the dense equatorial forests of Africa.

IDENTIFICATION DU BOIS

Description anatomique du bois

Wood diffuse porous. Vessels in dendritic pattern. Vessels in diagonal and/or radial pattern. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Tyloses common. Non-vestured pits. Vessels per mm2 Axial parenchyma in continuous tangential lines or fine bands. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. Axial parenchyma bands more than 3 cells wide. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Silica bodies in upright and/or square ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.

Vue macroscopique du bois (plan tangentiel)
Vue microscopique d'une section transversale du bois

Disponibilité

Statut CITES

Unrestricted

DESCRIPTION GÉNÉRALE DU BOIS

Teinte

The sapwood is dark grey to pinkish grey, it has a thickness of 4 to 6 cm. The heartwood is pink brown to red brown, it is clearly demarcated. The silver figure is fine (hardly visible).

Index de Teinte (1 = Noir, 7 = Jaune clair)

Grain

Straight or slightly interlocked, sometimes with an influence on further processing operations.

Texture

This wood has a somewhat fine texture.

Luster

It is reported to be low in luster.

Durabilité naturelle

Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.

Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)

Tensions internes de croissance

Residual growth stresses are absent.

Teneur en silice

Silica Content: Silica is present. Amounts over 0.05% may affect wood processing. Silica Value: 0.19

Résistance à l'imprégnation

Difficult to treat with only a low penetration of the preservative products.

PROPRIÉTÉS PHYSIQUES DU BOIS

Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)

0.77

Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)

0.87

Retrait tangentiel total (saturé à 0%TH) (%)

8.7

Retrait radial total (saturé à 0%TH) (%)

6.5

Défauts dus au séchage

Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. Drying Defects: Risks of distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.

Calendrier de séchage en séchoir recommandé

FR-4

Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)

1.3

Calendrier de séchage en séchoir

http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf

PROPRIÉTÉS CHIMIQUES DU BOIS

PROPRIÉTÉS MÉCANIQUES DU BOIS

Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)

1453

Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)

214516

Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)

750

Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)

107

Résistance au cisaillement (radial) 12%TH (kgf/cm²)

124

Dureté Janka (latérale) 12%TH (kgf)

949

Dureté Janka (extrémités) 12%TH (kgf)

1003

OUVRABILITÉ

Sciage

Sawing of this species requires powerful equipment.

Coupe de placage de déroulage

Suitable for slicing, also suitable for peeling if treated.

Placage tranche

Suitable for slicing, also suitable for peeling if treated.

Effet d'émoussement

Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.

Usinage

It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.

Rabotage

Moderately easy; tools must be cautiously sharpened.

Moulurage

Moderately easy; tools must be cautiously sharpened.

Tournage

Perçage

Moderately easy; tools must be cautiously sharpened.

Mortaisage

Moderately easy; tools must be cautiously sharpened.

Clouage

Pre-boring is necessary.

Collage

Difficult to glue because of high density.

Ponçage

Easy to perform; it gives good results.

Polissage

Can be polished without surface preparation.

Cintrage à la vapeur

It is well suited for wood bending uses.

Compatibilité avec outils manuels

Working with hand tools is difficult.

UTILISATIONS

UTILISATIONS FINALES (RÉSUMÉ)

HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, BENDING, chairs, OTHER AND MUSICAL INSTRUMENTS, handicrafts

MEUBLES ET M. DE RANGEMENT

10 - Silica in Timbers

Pouters

11 - Prospect: The wood database

Solives

12 - Tropical timbers of the world. Part I-Tropical American Species

Planches

13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures

Planchers

14 - Handbook of Hardwoods

Parquets

15 - Empire Timbers

Cadres

16 - Woods of the World

Marches

17 - Tree Conservation Database

Panneaux

18 - W3TROPICOS Missouri Botanical Garden

Accessoires en bois

19 - Silica in Timbers

MEUBLES ET M. DE RANGEMENT

21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.

Meubles luxe

22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods

Armoires

24 - Empire Timbers

PANNEAUX ET PLACAGE

25 - Directory of Timber Trade Malaysia

Faces (de placage)

26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO

Placage tranché

28 - Ministry of Agriculture, Fisheries & Forest of Fiji

Tournage

30 - Embassy of Honduras in Japan

Ornements

31 - Embassy of Colombia in Japan

Ornements

32 - Embassy of Cote d`Ivoire in Japan

Manches de couverts

33 - Embassy of Gabon in Japan

Formes à chaussures

34 - Embassy of Indonesia in Japan

Résistance à la flexion

35 - Embassy of Myanmar in Japan

Chaises

36 - Autoridad Nacional del Ambiente, Panama

Artisanat

66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)

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