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CRAB APPLE/PINK BIRCH (Schizomeria serrata)

Trade Name

Crab apple/Pink birch

Scientific Name

Schizomeria serrata

Family

CUNONIACEAE

Common Names

Ukir (Indonesia); Obat rede (Indonesia)

Scientific Name Synonyms

Schizomeria floribunda Schlechter; Schizomeria brassii Mattf.

Description Of The Tree

Botanical Description

It can reach a height of 25 m. with girths of over 60 cm above the buttresses. The bole is straight and cylindrical.

Natural Habitat

Schizomeria species are reported in primary evergreen or deciduous forests up to 1,300 m of altitude.

Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Tangential diameter of vessel lumina 100 micras or less (very small). Occasionally tyloses common. Occasionally vessels per mm2 more than 20. Vessels per mm2 more than 20 (very abundant). Vessel-ray pits reticulate and/or foraminate. Simple Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. Axial parench 4 to 10 rays per mm (medium). Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Body ray cells procumbent with o Fibers with distinctly bordered pits.

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

Availability

Cites Status

Unrestricted

General Wood Description

Color

The sapwood is pink to pale brown. The heartwood is pink, pink-brown or red-brown.

Grain

The grain varies from shallowly to moderately interlocked.

Texture

Fine texture is reported in this species.

Luster

This wood is lustrous.

Natural Durability

It has very little or no natural resistance to decay or insect attack.

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

5

Resistance To Impregnation

The heartwood is reported to be extremely resistant to impregnation but the sapwood is treatable.

Wood Physical Properties

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

0.53

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

0.58

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

5.0

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

4.0

Drying Defects

Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of checks. Kiln Schedules: The kiln schedule has been tested.

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

1.3

Wood Chemical Properties

Wood Mechanical Properties

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

996

Stiffness (MOE) 12%MC (kgf/cm²)

140215

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

568

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

73

Shear strength radial 12%MC (kgf/cm²)

122

Janka hardness (side) 12%MC (kgf)

452

Janka hardness (end grain) 12%MC (kgf)

658

Workability

Sawing

Cutting resistance is generally low.

Rotary Veneer Cutting

The peeling properties are fairly good, but thermal treatments are advisable.

Sliced Veneer

The peeling properties are fairly good, but thermal treatments are advisable.

Machining

It is easy to machine.

Planing

Planing operations are rather easy.

Turning

30

Nailing

Nailing is reported as easy.

Gluing

This species is easy to glue.

Finishing

It gives a smooth finish.

Coatings

This species is reported to be easy to paint or varnish.

Polishing

Polishing of this wood is easy.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, flooring, frames, panelling, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, CONTAINERS, cooperage, NAVAL CONSTRUCTION, boat deck, 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
Containers
  • 50 - Properties of imported tropical woods
Cooperage
  • 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
Boat Decking
  • 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
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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