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Gommier
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
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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