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SILVER ASH (Flindersia schottiana)

Trade Name

Silver ash

Scientific Name

Flindersia schottiana F. v. Mueller

Family

RUTACEAE

Common Names

Mejernana (West Irian); Northern silver ash; Mejernana (Indonesia); Iskumun (Indonesia); Iskumun (West Irian); Fenum (Indonesia); Silver ash; Fenum (West Irian)

Scientific Name Synonyms

Flindersia pubescens (F. v. Mueller) F. M. Bailey

Description Of The Tree

Botanical Description

Trees up to 45 m tall, with a straight and cylindrical bole up to 100 cm. It is branchless up to 21 m, no buttresses are reported.

Natural Habitat

This species is widespread in monsoon, hill and lower montane forest.

Natural Distribution

It occurs from coastal New South Wales scrub to rainforests of north-eastern Queensland; also found in Papua New Guinea and Irian Jaya.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Tangential diameter of vessel lumina 100 micras or less (very small). Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 5 to 8 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. 4 to 10 rays per mm (medium). Ray height more than 1 mm. 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). Fibers very thin walled. Fibers with simple to minutely bordered pits.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Odor

It has no taste or odor.

Color

Timber varies in color from white to pale brown or slightly tawny. Sapwood and heartwood are not distinct.

Grain

The grain is mainly straight, occasionally wavy or shallowly interlocked.

Texture

The wood is reported to be frequently medium textured.

Natural Durability

It is very durable for uses above the ground.

Natural durability index (1= Very high durability, 7=Vey low durability)

2

Resistance To Impregnation

The heartwood is extremely difficult to impregnate.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.62

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.69

Total shrinkage Tangential (Saturated to 0%MC) (%)

9.6

Total shrinkage Radial (Saturated to 0%MC) (%)

6.0

Drying Defects

Drying Defects: There is a low risk of checking upon seasoning.

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

1.6

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1050

Stiffness (MOE) 12%MC (kgf/cm²)

132878

Compression parallel to fiber 12%MC (kgf/cm²)

571

Compression perpendicular to fiber 12%MC (kgf/cm²)

122

Shear strength radial 12%MC (kgf/cm²)

132

Janka hardness (side) 12%MC (kgf)

545

Workability

Rotary Veneer Cutting

This species can be used for lamination.

Sliced Veneer

This species can be used for lamination.

Machining

It is easy to machine.

Planing

Interlocked grain may pick up in planing.

Turning

30

Gluing

This species is easy to glue.

Response To Hand Tools

This species is easy to work with hand tools.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, flooring, frames, panelling, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, BENDING, SPORTS, TOOLS, tool handles, agricultural tools, PACKING, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, boat oars, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings

General Housing
  • 10 - Silica in Timbers
Flooring
  • 14 - Handbook of Hardwoods
Frames
  • 16 - Woods of the World
Paneling
  • 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
  • 24 - Empire Timbers
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Turning
  • 30 - Embassy of Honduras in Japan
Bending
  • 35 - Embassy of Myanmar in Japan
Sports
  • 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Tools
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
  • 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Agricultural Tools
  • 44 - Atlas of Peruvian Woods
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Containers
  • 50 - Properties of imported tropical woods
Cooperage
  • 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Truck Body
  • 53 - Timbers of the New World
Truck Flooring
  • 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
Boats
  • 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Boat Oars
  • 60 - Amazonian Timbers, Characteristics and Utilization Volume II; Curuá-Una Experimental Forest Station
Other & Musical Instruments
  • 63 - Madeiras do Brazil II
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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