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BABI KURUS (Crudia curtisii)
Trade Name
Babi kurus
Scientific Name
Crudia curtisii Prain ex King
Family
Lequminosae
Common Names
Babi kurus (Indonesia); Jering tupai (Malaysia); Merbau kera (Malaysia); Kempas rimau (Malaysia)
Scientific Name Synonyms
Crudia glauca Ridley
Description Of The Tree
Botanical Description
It is an evergreen, small to medium-sized tree up to 25 m tall. The bole is up to 60 cm in diameter, with buttresses up to 2 m high.
Natural Habitat
This species is found in primary, occasionally in secondary lowland rainforests, up to 550 m of altitude. It prefers well drained sites, although it is also reported on temporarily inundated areas.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels exclusively solitary (over 90%). Colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Axial parenchyma in marginal or in seemingly marginal bands. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Axial parenchyma in narrow bands on lines up to 3 cells wide. Rays more than 10 per mm (abundant). 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 thick walled.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is dark chocolate-brown to purplish, sharply differentiated from the red-brown, yellow-brown or straw-colored sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
2
Grain
The grain is reported to be wavy and interlocked.
Texture
The texture moderately fine and rather uneven.
Natural Durability
It is reported as very durable.
Natural durability index (1= Very high durability, 7=Vey low durability)
2
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.96
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
1.13
Drying Defects
Ease of Drying: Seasoning is reported to be slow. Boards of 13 mm thick take 5 months and of 38 mm thick take about 7 months. Drying Defects: It stains moderately during drying.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1419
Stiffness (MOE) 12%MC (kgf/cm²)
172237
Compression parallel to fiber 12%MC (kgf/cm²)
729
Janka hardness (side) 12%MC (kgf)
1407
Janka hardness (end grain) 12%MC (kgf)
1407
Workability
Sawing
Wood of this species is difficult to cut.
Blunting Effect
The wood has a clear dulling effect on tools.
Planing
Planing of this species is reported to be difficult.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, HOUSING GENERAL, flooring, frames, TOOLS, tool handles
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Frames
- 16 - Woods of the World
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
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