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Vaivai-ni-veikau
Vaivai-ni-veikau (Serianthes myriadenia)

Family: Mimosaceae

Common names: Vaivai, Vaivai-ni-veikau

Distributed in: Fiji [Polynesia], Fiji (Oceania and S.E. Asia)

Common uses: Balusters, Bedroom suites, Boat building (general), Boat building, Boat building: decking, Boat building: planking, Building construction, Building materials, Cabinetmaking, Canoes, Carvings, Chairs, Chests, Concealed parts (Furniture), Construction, Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Interior construction, Interior trim, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Millwork, Moldings, Office furniture, Plain veneer, Plywood, Pulp/Paper products, Roofing, Shipbuilding, Structural work, Turnery, Vehicle parts, Veneer

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isYellow to golden-yellow to orange, Yellow-Brown to bright yellow, often with a greenish tinge and the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureCoarse and the lusterLustrous

Natural durability: Satisfactory resistance to decay above ground , Susceptible to attack from powder post (Lyctid & Bostrychid) beetles

Odor: No distinct odor or taste

Kiln Schedules: Kiln Drying Rate (in days) is rather slow

Kiln Drying Rate: Kiln drying rate (green to 12% mc) is rather slow, typically from 18-28 days for a board under 32 mm, to 52-84 days for a board 63 mm and thicker.

Drying Defects: Slight surface checking, Splitting

Ease of Drying: Variable, but good seasoning properties

Comments: Abnormal Wood Tissue Orange-Red deposits are reported to often be present Small compression failure and ingrown bark are some common defects in logs Tension wood is present in some logs

Blunting Effect: Moderate

Boring: Good boring properties

Carving: Poor to Very Poor Results

Cutting Resistance: Saws well in both green and seasoned conditions

Gluing: Fairly Difficult to Very Difficult

Mortising: Fairly good mortising properties, except in material with tension wood

Moulding: Good moulding properties

Movement in Service: Good moulding properties

Nailing: Pre-Boring Recommended, Tends to split during nailing

Planing: Responds well to ordinary tools in mortising

Resistance to Impregnation: Resistant sapwood

Resistance to Splitting: Poor

Response to hand tools: Responds well to hand tools

Routing recessing: Routs well

Sanding: Good sanding properties

Veneering qualities: Easy to cut, Suitable for peeling

Steam bending: Fairly Difficult to Very Difficult

Screwing: Poor to Very Poor Results ; Turning: Yields fairly smooth surfaces

Polishing: Good polishing properties after filling ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,42 0,43
Density 480 kg/m3
Bending Strength 506 772 kg/cm2
Crushing Strength 35 56 kg/cm2
Hardness 393 kg
Impact Strength cm
Shearing Strength 95 kg/cm2
Stiffness 93 113 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 496 400 kg/m3
Maximum Load cm-kg/cm3
Toughness 132 cm-kg
Static Bending 326 502 kg/cm2
Item Green Dry English
Bending Strength 7208 10985 psi
Crushing Strength 505 804 psi
Density 30 lbs/ft3
Hardness 867 lbs
Maximum Crushing Strength 3652 6318 psi
Shearing Strength 1365 psi
Static Bending 4645 7154 psi
Stiffness 1324 1608 1000 psi
Toughness 115 inch-lbs
Specific Gravity 0.42 0.43
Weight 31 25 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 5 %

Density (dry weight) = 31-37 lbs/cu. ft. 1
Bending strength (MOR) = low
Shrinkage, Radial = very small
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Shrinkage, Tangential = small
Shrinkage, Tangential = very small
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Hardness (side grain) = soft
Resists wearing and marring
Modulus of Elasticity (stiffness) = very low
Max. crushing strength = low
Hardness = medium
Density=Average/Medium
Crushing strength = high
Compression strength (parallel to grain) = high
Bending strength in the air-dry condition (about 12%moisture content)is high-comparable to Teak

Alston, A.S.,1966,Natural Heartwood Durability,Fiji Forestry Department, Suva. Fiji timbers and their uses No. 2Alston, A.S.,1966,Powder Post Beetle Lyctus Species,Fiji Forestry Department, Suva. Fiji timbers and their uses No.6Alston, A.S.,1982,Timbers of Fiji: Properties and potential uses,Fiji Forestry Department, SuvaBolza, E., Kloot, N.H.,1972,The Mechanical Properties of 56 Fijian Timbers,Australia C.S.I.R.O. Division of Forest Products Technological Paper,No.,62Fiji Department of Forestry,1968,The properties and potential uses of Vaivai-ni-Veikau (Serianthes,myriadenia,Fiji Forestry Department, Suva. Summary of the C.S.I.R.O. investigations,,Fiji timbers and their uses No.34Fiji Department of Forestry,1969,A Summary of the Properties of 34 Indigenous Timbers,Fiji Forestry Department, Suva. Fiji timbers and their uses No.38Fiji Department of Forestry,1972,Guide to the use of local timbers,Fiji Forestry Department, Suva. Fiji timbers and their uses No.55Fiji Forestry Department,1981,The Properties and Uses of 43 Indigenous and Exotic Timbers,Fiji Forestry Department, Fiji Timbers and their Uses No.71Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1Trotter, H.,1940,Manual of Indian Forest Utilization,O.U.P. Indian Branch, Calcutta
*Come interpretare i dati (manleva su eventuali imprecisioni)