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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.
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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