Choboch (Heritiera ornithocephala)
Family: Sterculiaceae
Common names: Choboch, Chopwoch, Chumprak, Huynh, Kanze, Lumbayau, Mengkulang, Rosarosa
Distributed in: Fiji [Polynesia], Fiji, Myanmar (Oceania and S.E. Asia)
Distribution overview: Indo-Malayan region
Common uses: Bedroom suites, Boat building (general), Boat building: framing, Boxes and crates, Building construction, Building materials, Cabin construction, Cabinetmaking, Carvings, Casks, Chairs, Chests, Concealed parts (Furniture), Construction, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory construction, Factory flooring, Fine furniture, Floor lamps, Flooring, Flooring: commercial heavy traffic, Flooring: industrial heavy traffic, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles: general, Hatracks, Heavy construction, Joinery (external): ground contact, Joinery, Kitchen cabinets, Ladders, Light construction, Living-room suites, Mine timbers, Office furniture, Packing cases, Paneling, Parquet flooring, Piling, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Sills, Sporting Goods, Stools, Sub-flooring, Tool handles, Toys, Turnery, Vehicle parts
Product sources: Log production from this species is about 2% of Fiji's total timber production. It is often sold as 'Fiji hardwood' in a mixture with several other species.
Environment profile: Status has not been officially assessed
Colors: the heart isReddish brown, Yellowand the sapwoodWhite to yellow, Yellow.The grain isVariable figure, the textureMedium
Natural durability: Susceptible to attack from termites (Isoptera), Vulnerable to drywood termite attack
Odor: No specific smell or taste
Silica Content: Contains silica
Kiln Schedules: T3 - D2 (4/4) US
Kiln Drying Rate: Fairly rapid (11-17 days for boards under 32 mm, to 31-51 days for boards greater than 63 mm)
Drying Defects: Moderate collapse and honeycombing, Severe collapse and honeycomb
Ease of Drying: Rapidly
Tree Identification: Bole/stem form is not buttressed
Comments: General finishing qualities are rated as good
Blunting Effect: Severe
Boring: Fairly easy to very easy
Carving: Fairly Easy to Very Easy
Cutting Resistance: Easy to saw
Gluing: Fair to Good Results
Mortising: Fairly Easy to Very Easy
Moulding: Mortising, boring, routing, and carving are all difficult
Movement in Service: Mortising, boring, routing, and carving are all difficult
Nailing: Holds nails well, Very Good to Excellent
Planing: Planes well, to a good finish
Resistance to Impregnation: Extremely resistant
Resistance to Splitting: Poor
Response to hand tools: Easy to machine
Routing recessing: Fairly Easy to Very Easy
Sanding: Good sanding qualities
Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Very Good to Excellent Results
Polishing: Fair to Good;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
0,64 |
0,7 |
|
Density |
|
769 |
kg/m3 |
Bending Strength |
804 |
1264 |
kg/cm2 |
Crushing Strength |
90 |
116 |
kg/cm2 |
Hardness |
|
957 |
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
166 |
kg/cm2 |
Stiffness |
135 |
157 |
1000 kg/cm2 |
Tangential Shrinkage |
|
|
% |
Radial Shrinkage |
5 |
|
% |
Weight |
753 |
673 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
275 |
cm-kg |
Static Bending |
518 |
704 |
kg/cm2 |
|
| | | | Item | Green | Dry | English | Bending Strength | 11440 | 17988 | psi | Crushing Strength | 1284 | 1661 | psi | Density | | 48 | lbs/ft3 | Hardness | | 2110 | lbs | Maximum Crushing Strength | 6460 | 9789 | psi | Shearing Strength | | 2375 | psi | Static Bending | 7370 | 10025 | psi | Stiffness | 1927 | 2247 | 1000 psi | Toughness | | 239 | inch-lbs | Specific Gravity | 0.64 | 0.7 | | Weight | 47 | 42 | lbs/ft3 | Radial Shrinkage | 5 | | % | Tangential Shrinkage | 9 | | % | |
Density (dry weight) = 53-60 lbs/cu. ft. 0 Max. crushing strength = high 1 Bending strength (MOR) = medium Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = medium Modulus of Elasticity (stiffness) = high Shrinkage, Tangential = large Shrinkage, Tangential = moderate Shrinkage, Radial = small Shrinkage, Radial = moderate Shrinkage, Radial = large Shrinkage, Radial = fairly large Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = high Shrinkage, Tangential = small Shrinkage, Tangential = fairly large
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.6Bolza, 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.,62Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Desch, H. E. 1957. Manual of Malayan Timbers. Malayan Forest Records, 28(30):315-318.Fiji 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,1967,The Properties and Potential Uses of Rosarosa (Heritiera ornithocephala) A,Summary of C.S.I.R.O. Investigations,Fiji Timbers and their Uses No.18, Forestry Department Suva, FijiFiji Forestry Department,1969,Timbers for Flooring A Note on Current & Potential Species,Fiji Timbers and their Uses No.36, Department of Forestry, Suva, FijiFiji 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,1
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