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DOI (Alphitonia zizyphoides)
Trade Name
Doi
Scientific Name
Alphitonia zizyphoides (Spreng)A.Gray
Family
Rhamnaceae
Common Names
Doi (Fiji)
Description Of The Tree
Botanical Description
Average bole length of 10 m,up to an 18 m maximum.
Natural Habitat
A common constituent of the low land rainforest ,secondary vegitation and riverine formation. Occupies marginal position in tall rainforest. Native to the Pacific region.
Non Timber Uses
Doi is a medium density hardwood, it has yet to be commercially recognized but has potential uses which include building timber, flooring, moulding, furniture, paneling, and so on.
Wood Identification
Anatomic Description Of Wood
Vessels per mm2 6 to 10 (medium). Tangential diameter of vessel lumina 150 to 200 micras (medium). Vessels in radial multiples of 2 to 4. Occasionally vessels in radial multiples of 4 or more common. Axial parenchyma in discontinuous tangential lines. Paratracheal axial parenchyma scanty and/or vasicentric.
Availability
Cites Status
Unrestricted
General Wood Description
Color
Doi has a pale pinkish-brown sapwood ,up to 100 mm wide. The heartwood is orange-brown to red-brown in color, somewhat lustrous on radial faces. Dark resinous exudates and sometimes whitish deposits are a feature of a few of the vessels.
COLOR INDEX (1=Black, 7=Light yellow,white)
3
Grain
Grain straight.
Texture
Texture is intermediate.
Natural Durability
Sapwood is immune or rarely susceptible to Lyctus attack. Heartwood is not durable, being rated adequate only for hazard 1 end uses. Timber out of ground contact, continuously protected from the weather. Stock liable to blue-stain an yellow fungal stain.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.50
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.61
Total shrinkage Tangential (Saturated to 0%MC) (%)
5.1
Total shrinkage Radial (Saturated to 0%MC) (%)
2.6
Recommended Dry Kiln Schedule
Fiji-5
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
650
Stiffness (MOE) 12%MC (kgf/cm²)
105000
Workability
Sawing
Doi is easy to saw and machine either in the green or dry condition and results are generally very satisfactory. Some sawn and turned surfaces may be slightly fibrous, but not to any significant degree.
Rotary Veneer Cutting
Very limited testing suggests that peeling and drying properties are satisfactory, but overall suitability appears to be limited by various discolourations and defects. In addition, gum exudations may affect finishing properties.
Sliced Veneer
Very limited testing suggests that peeling and drying properties are satisfactory, but overall suitability appears to be limited by various discolourations and defects. In addition, gum exudations may affect finishing properties.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, cabinets, OTHER AND MUSICAL INSTRUMENTS, moldings
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.
Cabinet
- 24 - Empire Timbers
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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