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BURCKELLA (Burckella macropoda)

Trade Name

Burckella

Scientific Name

Burckella macropoda (Krause) H.J. Lam

Family

SAPOTACEAE

Common Names

Rang rang (Papua New Guinea)

Scientific Name Synonyms

Illipe macropoda Krause; Croixia macropoda (Krause) Baehni

Description Of The Tree

Botanical Description

It is a medium-sized to fairly large tree, up to 40 m tall. The bole is branchless for up to 24 m and up to 65 cm in diameter. The buttresses are up to 2 m high.

Natural Habitat

This species usually grows in the primary forests, on the lowlands. In Papua New Guinea it is reported up to 1,000 of altitude.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Tyloses common. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Axial parenchyma reticulate. Occasionally siliceous bodies in the axial parenchyma. Rays more than 10 per mm (abundant). Silica bodies in the ray cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-I Fibers with simple to minutely bordered pits.

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood is pinkish-brown to red-brown, and not distinctly demarcated from the paler sapwood.

Grain

The grain is usually interlocked, sometimes straight.

Texture

The texture is moderately fine to coarse.

Natural Durability

The wood is moderately durable. Logs may be attacked by pinhole borers and termites.

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

3

Silica Content

Silica Content: It is reported to have silica. Contents over 0.05% may affect wood processing. Silica Value: 0

Resistance To Impregnation

The heartwood is resistant to preservative treatment, but the sapwood is permeable.

Wood Physical Properties

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

0.70

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

0.79

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

9.3

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

5.0

Drying Defects

Ease of Drying: Shrinkage of the wood during seasoning is low. It seasons well. Drying Defects: Risk of little degrade and slight end-splitting.

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

1.9

Wood Chemical Properties

Wood Mechanical Properties

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

1223

Stiffness (MOE) 12%MC (kgf/cm²)

143781

Workability

Sawing

The behavior of this species in sawing is considered to be fair to difficult.

Rotary Veneer Cutting

The peeling properties are usually poor, even when pre-heated.

Sliced Veneer

The peeling properties are usually poor, even when pre-heated.

Blunting Effect

This wood is reported to contain silica which might affect sawing.

Planing

Planing is reported to be easy.

Moulding

Molding is reported to be easy.

Boring

Boring operations are rather easy.

Mortising

Mortising of this species is reported to be easy.

Sanding

This species is reported to be easy to sand.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings

General Housing
  • 10 - Silica in Timbers
Flooring
  • 14 - Handbook of Hardwoods
Paneling
  • 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
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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