Gommier (Dacryodes excelsa)
Family: Burseraceae
Common names: Candle tree, Candlewood, Gommier, Gommier a canot, Gommier blanc, Gommier montagne, Tabonu, Tabonuco
Distributed in: Cuba, Dominican Republic, Guadelope [France], Guadeloupe, Haiti, Jamaica, Netherlands, Puerto Rico [US], Puerto Rico (Central America, Oceania and S.E. Asia)
Distribution overview: Puerto Rico and Lesser Antilles from St. Kitts to Grenada, including Goudeloupe and Martinique. Generally in small groups along upper slopes, but forms almost pure stands at high elevations in Dominica. This most majestic tree of Puerto Rico is mostly limited to the remaining virgin or protected rain forest of the lower slopes of the Luquillo Mountains.
Common uses: Beams, Bedroom suites, Boat building (general), Boxes and crates, Building construction, Cabin construction, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Concrete formwork, Construction, Decks, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Factory construction, Fine furniture, Floor lamps, Food containers, Form work, Foundation posts, Framing, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Joists, Kitchen cabinets, Light construction, Living-room suites, Office furniture, Plywood, Porch columns, Radio - stereo - TV cabinets, Rough construction, Rustic furniture, Shingles, Stools, Tables , Utility furniture, Vehicle parts, Veneer, Veneer: decorative, Wardrobes
Product sources: The ITTO reports that timber from this species is produced in limited quantities, and is exclusively for local consumption.
Environment profile: Rare in parts of its natural range (population is at risk)
Tree size: Trunk diameter is 100-150 cm
Colors: the heart isRed, Yellowand the sapwoodWhite, Yellow.The grain isStriped figure, the textureResinous and oilyand the lusterPronounced
Natural durability: The heartwood is susceptible to wood staining fungal attack, Very durable
Odor: No specific smell or taste
Silica Content: Moderate silica contact
Kiln Schedules: Drying (speed) is fast
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Slight twist/warp, Splitting
Ease of Drying: Slowly
Tree Identification: Bole/stem form is straight
Comments: General finishing qualities are rated as good Standing Gommier trees are often tapped for a fragrant resin exudate which is used for the manufacture of candle and also for medicinal purposes.The timber polishes well.
Blunting Effect: High to severe
Boring: Moderately easy
Cutting Resistance: Cutting Resistance with green wood is easy
Gluing: Fairly Easy to Very Easy
Mortising: Finishes well
Moulding: Good finishing
Movement in Service: Good finishing
Nailing: Holds nails well, Pre-Boring Recommended
Planing: Planes well, to a good finish
Resistance to Impregnation: Sapwood is resistant
Resistance to Splitting: Good
Response to hand tools: Moderate working qualities
Sanding: Good sanding finish
Steam bending: Very Good to Excellent Results
Screwing: Fairly Difficult to Very Difficult, Pre-boring recommended; Turning: Very Good to Excellent Results
Polishing: Very Good to Excellent; Staining: Finish is generally good
; Varnishing: Good;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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 |
 |
 |
Item |
Green |
Dry |
Metric |
Specific Gravity |
0,48 |
|
|
Density |
|
641 |
kg/m3 |
Bending Strength |
700 |
1037 |
kg/cm2 |
Crushing Strength |
299 |
480 |
kg/cm2 |
Hardness |
|
400 |
kg |
Impact Strength |
93 |
159 |
cm |
Shearing Strength |
|
|
kg/cm2 |
Stiffness |
84 |
103 |
1000 kg/cm2 |
Tangential Shrinkage |
5 |
|
% |
Radial Shrinkage |
3 |
|
% |
Weight |
624 |
496 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
182 |
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 9959 | 14761 | psi | Density | | 40 | lbs/ft3 | Hardness | | 882 | lbs | Impact Strength | 37 | 63 | inches | Maximum Crushing Strength | 4263 | 6839 | psi | Stiffness | 1206 | 1470 | 1000 psi | Toughness | | 158 | inch-lbs | Specific Gravity | 0.48 | | | Weight | 39 | 31 | lbs/ft3 | Radial Shrinkage | 3 | | % | Tangential Shrinkage | 5 | | % | Volumetric Shrinkage | 10 | | % | |
Max. crushing strength = medium Density (dry weight) = 38-45 lbs/cu. ft. Bending strength (MOR) = medium Shrinkage, Tangential = small Shrinkage, Radial = moderate Shrinkage, Tangential = very small Shrinkage, Radial = very small Modulus of Elasticity (stiffness) = very low Modulus of Elasticity (stiffness) = low Bending strength (MOR) = high
Brown, W.H.,1978,Timbers of the World, No. 9 Central America and the Caribbean,TRADA, Red Booklet SeriesChichignoud, M., G. Deon, P. Detienne, B. Parant, and P. Vantomme. 1990. Tropical Timber Atlas of Latin America. Prepared for International Tropical Timber Organization (ITTO) by Centre Technique Forestier Tropical (CTFT, Division of CIRAD, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Little, E.L., Wadsworth, F.H.,1964,Common Trees of Puerto Rico and the Virgin Islands,U.S.A. Department of Agriculture, Agriculture Handbook,No.249Longwood, F.R.,1961,Puerto Rican Woods - Their Machining Seasoning and Related Characteristics,U.S.A. Department of Agriculture, Agriculture Handbook,No.205Takahashi, A.,1975,Compilation of data on the Mechanical Properties of Foreign Woods (Part 2,Central and South America,Shimane University, Japan, Research Report on Foreign Wood No.4WCMC. 1992. Conservation Status Listing: Trees and Timbers of the World. World Conservation Monitoring Center (WCMC, Plants Program, 219 Huntingdon Road, Cambridge, CB3 ODL, United Kingdom.
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