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TIGA (Tristaniopsis micrantha)
Trade Name
Tiga
Scientific Name
Tristaniopsis micrantha (Merr.) Peter G. Wilson & J.T. Waterh.
Family
Myrtaceae
Common Names
Tiga (Philippines)
Scientific Name Synonyms
Tristania micrantha Merr.
Description Of The Tree
Botanical Description
It is a small to medium-sized tree up to 10 m tall, 40-60 cm in diameter. The buttresses are absent.
Natural Habitat
Tristaniopsis trees are reported in many types of lowland to lower montane forests, up to 1,300 m of altitude. Often found scattered along rivers or near the coast.
Wood Identification
Anatomic Description Of Wood
Vessels per mm2 5 to 20. Vessels in diagonal and/or radial pattern. Vessels exclusively solitary (over 90%). Tyloses common. Tangential diameter of vessel lumina 100 to 200 micras. Vestured pits. Vessel-ray pits reticulate and/or foraminate. Vascular/vasicentric Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma confluent unilateral paratracheal. Occasionally axial parenchyma in narrow bands on lines up to 3 cells wide. 4 to 10 rays per mm (medium). Rays exclusively uniseriate. Silica bodies in the ray cells. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). All ray cells upright and/or square. Fibers with simple to minutely bordered pits. Fibers very thick walled.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is red brown, clearly demarcated from the pale color sapwood.
Grain
The grain is mostly interlocked.
Texture
The texture is fine to medium.
Natural Durability
The wood is durable to extremely durable.
Natural durability index (1= Very high durability, 7=Vey low durability)
2
Silica Content
Silica Content: Silica content is high. Amounts over 0.05% may affect wood processing. Silica Value: 0
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.94
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
1.11
Total shrinkage Tangential (Saturated to 0%MC) (%)
11.0
Total shrinkage Radial (Saturated to 0%MC) (%)
7.3
Drying Defects
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of distortions.
Recommended Dry Kiln Schedule
JP-30
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.5
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
2450
Compression parallel to fiber 12%MC (kgf/cm²)
951
Compression perpendicular to fiber 12%MC (kgf/cm²)
75
Shear strength radial 12%MC (kgf/cm²)
255
Workability
Sawing
Sawmilling of this species is reportedly difficult.
Blunting Effect
It is considered to have a severe blunting effect on the cutting elements.
Machining
Machining of this species is fair to difficult.
Nailing
This wood is difficult to nail. Pre-boring is recommended.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, bridges, poles, stakes posts, crossties, piers, HOUSING GENERAL, beams, flooring, SPORTS, bowling polo balls, TOOLS, tool handles, NAVAL CONSTRUCTION, boat deck, port pillar, port storage, OTHER AND MUSICAL INSTRUMENTS, axle, wheel
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poles
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Stake Posts
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Crossties
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
Piers
- 9 - Maderas latinoamericanas. IV, Nectandra sp. Ocotea austinii, Persea sp. aff. vesticula, Persea schiedeana
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Flooring
- 14 - Handbook of Hardwoods
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Balls Bowling Polo
- 40 - Internet
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boat Decking
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Port Pillar
- 61 - Manual de Diseño para Maderas del Grupo Andino
Port Storage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Axles
- 73 - Handbook of Hardwoods
Wheels
- 75 - Tropenholzer
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