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RENGAS (Gluta renghas)
Nome comercial
Rengas
Nome científico (autor)
Gluta renghas L.
Família
ANACARDIACEAE
Nomes comuns
Kayu rengas (Indonesia); Rangai (Indonesia); Inghas (Indonesia); Rengas tembaga (Indonesia); Rengas hutan (Indonesia); Rengas ayer (Malaysia); Rengas burung (Indonesia); Thayet-thitsi (Myanmar); Rak baan (Thailand); Rengas jitong (Malaysia); Rak khao (Thailand); Rengas merah (Indonesia); Rengas (Italy); Rengas (Spain); Rengas (France); Rengas (United Kingdom); Thitsi (Myanmar); Rengas (Sarawak); Rengas betul (Indonesia); Rengas perau (Indonesia); Rengas (Indonesia); Rengas (Sweden); Borneo rosewood (United Kingdom); Rak (Thailand); Rengas (Germany); Rengas (Malaysia); Son (Vietnam); Rengas (United States of America); Rengas (Netherlands); Gluta (India)
DESCRIÇÃO DA ÁRVORE
Descrição botânica
It is a medium-sized to large tree up to 50 m tall, with boles up to 115 cm in diameter, often multiple-stemmed and conically thickened at base. Buttresses are often present. This species yields a latex which is made into black lacquer, it is also poisono
Habitat natural
Gluta renghas occurs gregariously along river banks in freshwater tidal beaches and in swamp forests without peat formation.
Usos não madeiravéis
The sap of Rengas contains poisonous compounds which disappear gradually with drying. It might produce an adverse reaction on sensible individuals.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Tyloses common. Vessels per mm2 less than 6 (rare). Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits large, 10 micras or more. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma in narrow bands on lines up to 3 cells wide. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with distinctly bordered pits.
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Odor ou Cheiro
Odor and taste are indistinct.
Cor
The sapwood is clearly differentiated, white to pale yellow. The heartwood is dark reddish brown or deep blood red, streaked with darker colored zones.
Indice de cor
4
Grã
It is partly straight, partly wavy, interlocked.
Veios ou desenhos na superfície
The texture varies from medium to coarse.
Brilho
Timber of this species is moderate in luster.
DURABILIDADE NATURAL
The sapwood rapidly discolors and infested by insects if unprotected.
Indice de durabilidade natural
6
Tratamento preservativo
It is easy to treat with preservatives.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.66
Densidade seca ao ar 12% (g/cm³)
0.73
Contração Tangencial Total (Saturado até peso seco) (%)
6.0
Contração Radial Total (Saturado até peso seco) (%)
3.2
Defeitos causados pela secagem
Ease of Drying: Boards of 13 mm and 38 mm thick can be dried in 2 months and 4 months, respectively. Drying Defects: There is a tendency to check, split and warp.
Programa de secagem recomendável
UK-E
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
1.9
Programa de secagem detalhado
http://www.tropicaltimber.info/wp-content/uploads/2015/08/KD_British_ENG.pdf
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
925
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
123384
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
520
Cisalhamento radial a 12% (kgf/cm²)
48
Dureza Janka a 12% (perpendicular) (kgf)
303
Dureza Janka a 12% (paralela) (kgf)
319
TRABALHABILIDADE
Serrar ou Cortar
The behavior of this species in sawing is considered to be easy to slightly difficult.
Desdobro da tora em torno para lâminas
For good results in slicing, steaming is required.
Desdobro da tora em faqueadeira para lâminas
For good results in slicing, steaming is required.
Aspectos do processamento em máquinas
Machining operations are rather easy, but slightly difficult when dry.
Aplainamento
Planing of dry wood is reported to be easy to fair.
Torneamento
30
Furação
Boring operations are fair to difficult.
Comportamento na aplicação de pregos
It is easy to nail.
Colagem
Gluing behavior is reportedly good.
Acabamento
Wood of this species gives a good finish.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
HOUSING GENERAL, beams, flooring, panelling, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, TOOLS, tool handles, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts
CASAS
- 10 - Silica in Timbers
Vigas
- 11 - Prospect: The wood database
Pisos
- 14 - Handbook of Hardwoods
Painéis
- 18 - W3TROPICOS Missouri Botanical Garden
MÓVEIS GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Móveis finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
CHAPAS
- 25 - Directory of Timber Trade Malaysia
Lâminas de superfície das chapas
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Lâminas decorativas
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneamento
- 30 - Embassy of Honduras in Japan
FERRAMENTAS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Mangos herramientas
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
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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