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DABEMA (Piptadeniastrum africanum)
Nome comercial
Dabema
Nome científico (autor)
Piptadeniastrum africanum Brenan
Família
LEGUMINOSAE
Nomes comuns
Mbele (Sierra Leone); Guli (Sierra Leone); Beyae (Guinea); Odan (Ghana); Elae (Ghana); Dabema (Côte d`Ivoire); Odan (United Kingdom); Elae (United Kingdom); Ekhimi (United Kingdom); Agboin (United Kingdom); N'singa (Congo); Koungou (Central African Republic); N'singa (Angola); Wunga; To; Singa; Sanga; Redwood; Odanwoma; Odannan; Odane; Odan; Nga; N-go; Mussasae; Musese; Mugeye; Mbele-guli; Koungou; Ka-bari; K-kuperb; Jondo; Itoumb?; Gau; Erundu; Eran; Elany; Elae; Ekhivi; Dubima; Dane; Dandad; Chen; Bokungo; Bokundu; Bi-eh; Banzu; Akasanumu; Agbion; African greenheart; Bokungu (Zaire); N`inga (Angola); N`singa (Congo); Toum (Gabon); Tom (Equatorial Guinea); Atui (Cameroon); Mbeli (Liberia); Ekhimi (Nigeria); Agboin (Nigeria); Dahoma (Ghana); Debema (Côte d`Ivoire); Bukundu (Netherlands); Ekhim (United Kingdom); Dahoma (United Kingdom); Mpewere (Uganda); Likundu (Zaire); Dabema
Nome científico sinônimo (autor
Piptadenia africana Hook. f.
DESCRIÇÃO DA ÁRVORE
Descrição botânica
The tree reaches a height of 26 to 32 m, with trunk diameters up to 130 cm. The bole is cylindrical, straight, and slightly buttressed.
Habitat natural
Piptadeniastrum africanum is found in rain forest and transitional formations, often as a solitary emergent tree in farmland and secondary bush.
Distribuição natural
West, Central and East Africa, from Senegal to Angola and Uganda.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Odor ou Cheiro
Unpleasant odor of ammoniac.
Cor
The sapwood is light color, it has a thickness of 5 or more cm. The heartwood is light brown to yellow-brown, it is clearly demarcated. The silver figure is fine (barely visible).
Indice de cor
5
Grã
The grain is highly and systematically interlocked; special care is needed when drying because of frequent risks of distortion.
Veios ou desenhos na superfície
This wood has a somewhat coarse texture.
Brilho
This wood is frequently low in luster.
DURABILIDADE NATURAL
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. Resistant to termites attack. The hear
Indice de durabilidade natural
3
Tensões internas do crescimento
This species is reported to have growth stresses.
Conteúdo de sílica
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0
Tratamento preservativo
Difficult to treat with only a low penetration of the preservative products.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.63
Densidade seca ao ar 12% (g/cm³)
0.70
Contração Tangencial Total (Saturado até peso seco) (%)
8.5
Contração Radial Total (Saturado até peso seco) (%)
3.8
Defeitos causados pela secagem
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of casehardening and 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.
Programa de secagem recomendável
FR-13
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
2.2
Programa de secagem detalhado
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
994
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
154862
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
583
Resistência a compressão perpendicular as fibras a 12% (kgf/cm²)
76
Cisalhamento radial a 12% (kgf/cm²)
106
Dureza Janka a 12% (perpendicular) (kgf)
611
Dureza Janka a 12% (paralela) (kgf)
707
TRABALHABILIDADE
Serrar ou Cortar
It is moderately easy to saw.
Desdobro da tora em torno para lâminas
Not suitable for veneering.
Desdobro da tora em faqueadeira para lâminas
Not suitable for veneering.
Desgaste de ferramentas
Slight blunting effect; ordinary tools can be used for sawing and machining.
Aspectos do processamento em máquinas
Possible difficulties caused by interlocked grain are reported.
Aplainamento
Moderately easy; tools must be cautiously sharpened.
Aplicação para molduras
Moderately easy; tools must be cautiously sharpened.
Furação
Moderately easy; tools must be cautiously sharpened.
Fresagem_ranhura_canais
Moderately easy; tools must be cautiously sharpened.
Comportamento na aplicação de pregos
Pre-boring is necessary.
Colagem
Glues well if basic gluing technical rules are followed.
Lixamento
Difficult to obtain very good results because of interlocked grain.
Operação de lustre da superfície (brilho)
Needs pre-coating.
Steam Bending
This species can be used for steam bending.
Trabalhabilidade com ferramentas manuais
No particular problems.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
EXTERIOR GENERAL, rails, HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, FURNITURE AND CABINETS, common furniture, CONTAINERS, truck bodies, truck flooring
EXTERIOR
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Varão de cerca
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
CASAS
- 10 - Silica in Timbers
Vigas
- 11 - Prospect: The wood database
Vigotas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tábuas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
Marcos de portas
- 16 - Woods of the World
Degraus de escada
- 17 - Tree Conservation Database
MÓVEIS GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Móveis comuns
- 23 - Handbook of Hardwoods
Carroceria de caminhão
- 53 - Timbers of the New World
Pisos para assoalho de trem
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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