SILKY OAK, LACEWOOD (Grevillea robusta)
Nome comercial
Silky oak, Lacewood
Nome científico (autor)
Grevillea robusta A. Cunn. ex R. Br.
Família
PROTEACEAE
Nomes comuns
Traxibafn (Vietnam); Ngaan hoa (Vietnam); Son india (Thailand); Khadaw hmi (Myanmar); Salamandar (Indonesia); Silky oak; Grevillea; Lacewood (United States of America)
DESCRIÇÃO DA ÁRVORE
Descrição botânica
It is a small to medium-sized tree up to 25 m tall. The bole is straight, branchless for up to 15 m, up to 80 cm in diameter, usually without buttresses.
Habitat natural
Grevillea robusta generally occurs in dry savanna forests up to 1,800 m of altitude.
Distribuição natural
It is native to eastern Australia.
Existência de plantações?
This species is widely planted in tropical and subtropical regions throughout the world. Extensively planted as a shade tree for coffee and tea plantations and as an ornamental.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Tyloses common. Vessels per mm2 5 to 20. Intervessel pits scalariform. Vessel-ray pits reticulate and/or foraminate. Multiple perforation plates. Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Over 9 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. 4 to 10 rays per mm (medium). Oil and/or mucilage cells associated with the axial and/or ray parenchyma (idioblasts). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with simple to minutely bordered pits.
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Foto de madeira macroscópica (radial)
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Foto da secção transversal microscopica
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Cor
The sapwood is cream. The heartwood is pink or light red when freshly cut, turning yellow-brown to red-brown on drying.
Indice de cor
5
Grã
The grain is straight or wavy.
Veios ou desenhos na superfície
Texture is usually medium to coarse.
Brilho
The wood surface is lustrous.
DURABILIDADE NATURAL
Timber of this species is liable to marine borers, pinhole borers and termite attack.
Indice de durabilidade natural
6
Tratamento preservativo
The sapwood is permeable, but the heartwood is moderately resistant to impregnation.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.56
Densidade seca ao ar 12% (g/cm³)
0.61
Contração Tangencial Total (Saturado até peso seco) (%)
9.6
Contração Radial Total (Saturado até peso seco) (%)
3.2
Defeitos causados pela secagem
Ease of Drying: Seasoning is reported to be good. Drying Defects: Risk of little checking and warping.
Programa de secagem recomendável
UK-C; US-T3-C2
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
3.0
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
790
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
107000
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
460
Cisalhamento radial a 12% (kgf/cm²)
117
Dureza Janka a 12% (perpendicular) (kgf)
378
TRABALHABILIDADE
Serrar ou Cortar
The response of this wood in sawing is easy to fair. Green wood saws easily but it may gum up the saw-blades.
Desdobro da tora em torno para lâminas
This timber is reported to be suitable for lamination.
Desdobro da tora em faqueadeira para lâminas
This timber is reported to be suitable for lamination.
Aspectos do processamento em máquinas
It is easy to machine.
Aplainamento
A cutting angle of 10 degrees is required to obtain a good finish on quarter-sawn faces.
Torneamento
30
Trabalhabilidade com ferramentas manuais
The wood responds well to hand tools.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
HOUSING GENERAL, boards, flooring, parquet, panelling, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, BENDING, TOOLS, agricultural tools, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts
CASAS
- 10 - Silica in Timbers
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
Painéis
- 18 - W3TROPICOS Missouri Botanical Garden
MÓVEIS GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Gabinetes
- 24 - Empire Timbers
CHAPAS
- 25 - Directory of Timber Trade Malaysia
Lâminas decorativas
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneamento
- 30 - Embassy of Honduras in Japan
Resistência a flexão
- 35 - Embassy of Myanmar in Japan
FERRAMENTAS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Cabos de instrumentos agrícolas
- 44 - Atlas of Peruvian Woods
PALETES PARA EMBALAGENS
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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
CONSTRUÇÃO NAVAL
- 55 - Tropical Timber Atlas of Latin America
Artesanato
- 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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