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DIVIDA (Scorodophloeus zenkeri)
Nom commercial
Divida
Nom scientifique (avec auteur)
Scorodophloeus zenkeri Harms
Famille
LEGUMINOSAE
Noms communs (pays)
Nsingna (Gabon); Esun-ngang (Gabon); Divida (Congo); Olom (Cameroon); Olan (Cameroon); Ngo (Cameroon); mingégné (Cameroon); Divida (Cameroon)
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 15 to 40 m. The bole is not always cylindrical and straight, often fluted near the butt, may be up to 23 m in length, unbuttressed. The trunk diameter attains 120 cm.
Habitat naturel
Scorodophloeus zenkeri occurs in dense forests, in wet locations, often on sandy soil.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pits Axial parenchyma confluent. Axial parenchyma in discontinuous tangential lines. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. Rays non-storied. Rays commonly 2 seriate. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is white. The heartwood is yellow, it is clearly demarcated.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
The grain is highly and systematically interlocked; special care is needed when drying because of frequent risks of distortion.
Texture
This species is usually reported to have a fine texture.
Luster
The surface of the wood is naturally low in luster.
Durabilité naturelle
Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Sensible to termites attack. The heart
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Teneur en silice
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.01
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.80
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.92
Défauts dus au séchage
Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks. 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-13
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)
1432
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
209555
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
843
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
125
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
133
Dureté Janka (latérale) 12%TH (kgf)
1052
Dureté Janka (extrémités) 12%TH (kgf)
1088
OUVRABILITÉ
Sciage
Sawing of this species requires powerful equipment.
Coupe de placage de déroulage
Not suitable for veneering.
Placage tranche
Not suitable for veneering.
Effet d'émoussement
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Usinage
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported. It is recommended to use special tools for cutting.
Rabotage
Moderately easy; tools must be cautiously sharpened.
Moulurage
Easy; no particular problems.
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
Clouage
Pre-boring is necessary.
Collage
Difficult to glue because of high density.
Ponçage
Difficult to obtain very good results because of interlocked grain.
Polissage
Can be polished without surface preparation.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, paling, stakes posts, rails, crossarms, crossties, piers, HOUSING GENERAL, flooring, parquet, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, TOOLS, tool handles, agricultural tools, CONTAINERS, cooperage, NAVAL CONSTRUCTION, boats, boat hulls, boat deck, port pillar, OTHER AND MUSICAL INSTRUMENTS, handicrafts, cigar boxes
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Ponts
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Pieux de cloture
- 4 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas da bicuiba
Piquets
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Rampe
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
Crosses
- 7 - Maderas latinoamericanas. II, Quercus alata Q. costaricensis y Q. eugeniaefolia
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
Piliers
- 9 - Maderas latinoamericanas. IV, Nectandra sp. Ocotea austinii, Persea sp. aff. vesticula, Persea schiedeana
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
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
Volets
- 20 - Prospect: The wood database
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles ordinaire
- 23 - Handbook of Hardwoods
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Outils_agric
- 44 - Atlas of Peruvian Woods
Tonnellerie
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Navires_coques
- 57 - Estadísticas de Aprovechamiento, Exportación y comercialización Nacional de Productos Forestales
Navires_ponts
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Ports piliers
- 61 - Manual de Diseño para Maderas del Grupo Andino
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Cigares
- 68 - Contribucion al conocimiento de la resistencia mecanica de la madera de peumo
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