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MERAWAN (Hopea mengarawan)
Nome comercial
Merawan
Nome científico (autor)
Hopea mengarawan Miq.
Família
Dipterocarpaceae
Nomes comuns
Merawan (United States of America); Damar cermin (Indonesia); Damar mata kucing (Indonesia); Tengerawan (Indonesia); Tengerawan (Sumatra); Tekan lampung (Borneo); Wapei (West Irian); Manggachapui (Philippines); Mai takien (Thailand); Merawan (Malaysia); Merawan (United Kingdom); Merawan (Indonesia); Merawan (France); Merawan (Spain); Merawan (Italy); Merawan (Sweden); Merawan (Netherlands); Merawan (Germany); Sengal (Malaysia); Damar lilin (Indonesia); Mang (Sarawak); Light hopea (Papua New Guinea); Sengal (Indonesia); Gagil (Sabah); Selangan (Sabah); Selangan-kasha (Sarawak); Takhian (Thailand); Thingan (Myanmar); Sau (Vietnam)
DESCRIÇÃO DA ÁRVORE
Descrição botânica
It is a medium-sized to large tree of up to 40 m tall. The bole is branchless for up to 25 m, sometimes more, with a diameter of up to 90 cm and prominently buttressed. It produces a good quality dammar resin.
Habitat natural
Scattered throughout lowland mixed dipterocarp forest, this species is an important source of merawan timber.
IDENTIFICAÇÃO DA MADEIRA
Descrição anatômica da madeira (macro e micro)
Vessels per mm2 5 to 20. Wood diffuse porous. Tangential diameter of vessel lumina 100 to 200 micras. Vestured pits. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Inter Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. Ray width 1 to 3 cells. Prismatic crystals in the ray cells. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III).
DISPONIBILIDADE
Situação CITES sobre a proteção
Unrestricted
DESCRIÇÃO GERAL DA MADEIRA
Cor
The sapwood is slightly differentiated, pale yellow-brown. The heartwood is yellowish when fresh, light to chocolate reddish brown after exposure.
Indice de cor
5
Grã
It is straight to somewhat wavy.
Veios ou desenhos na superfície
The texture varies from moderately fine to medium
DURABILIDADE NATURAL
It is durable and fairly resistant to fungi and insect attack.
Indice de durabilidade natural
2
Conteúdo de sílica
Silica Content: It is reported containing 0.2% silica. Silica Value: 0.2
Tratamento preservativo
It is very difficult to treat with preservatives.
PROPRIEDADES FÍSICAS DA MADEIRA
Densidade básica (Peso seco/Volume saturado) (g/cm³)
0.75
Densidade seca ao ar 12% (g/cm³)
0.85
Contração Tangencial Total (Saturado até peso seco) (%)
6.1
Contração Radial Total (Saturado até peso seco) (%)
2.7
Programa de secagem recomendável
UK-C; US-T3-C2
Estabilidade dimensional (Contração Tangencial Total %/Contração Radial Total %)
2.3
PROPRIEDADES QUÍMICAS DA MADEIRA
PROPRIEDADES MECÂNICAS DA MADEIRA
Resistência a flexão a 12% (Módulo de ruptura) (kgf/cm²)
958
Flexão Estática a 12% (Módulo de elasticidade) (kgf/cm²)
141794
Resistência a compressão paralela as fibras a 12% (kgf/cm²)
520
Cisalhamento radial a 12% (kgf/cm²)
51
Dureza Janka a 12% (perpendicular) (kgf)
390
Dureza Janka a 12% (paralela) (kgf)
518
TRABALHABILIDADE
Serrar ou Cortar
Sawing of this species is easy.
Desdobro da tora em torno para lâminas
Veneer 1.5 mm thick can be made satisfactorily with a peeling angle of 91 degrees.
Desdobro da tora em faqueadeira para lâminas
Veneer 1.5 mm thick can be made satisfactorily with a peeling angle of 91 degrees.
Aspectos do processamento em máquinas
Machining of this species is reported to be easy.
Aplainamento
Planing is reported to be easy.
Furação
Boring of this species is reported to be easy.
Comportamento na aplicação de pregos
This species is reported to have a good nailing behavior.
Colagem
It is reported to be easy to glue.
Acabamento
It is easy to finish.
USOS FINAIS RELATADOS
USOS FINAIS (RESUMO)
EXTERIOR GENERAL, crossties, HOUSING GENERAL, flooring, frames, steps, CONTAINERS, chemical storage
EXTERIOR
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Dormentes
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
CASAS
- 10 - Silica in Timbers
Pisos
- 14 - Handbook of Hardwoods
Marcos de portas
- 16 - Woods of the World
Degraus de escada
- 17 - Tree Conservation Database
CAIXA GRANDE OU CONTAINER
- 50 - Properties of imported tropical woods
Chemical Storage
- 52 - Propiedades mecanicas y asociadas del pino insigne (Pinus radiata d.don)
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