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S. AMERICAN OAK

Botanical Name: Caryocar glabrum
Other Common Names: Almendro, Batsouari, Cagui, Chawari, Jigua, Piquia, Piquiarana, Sawari
Common Uses: Barge fenders, Beams, Boat building, Building construction, Cabin construction, Canoes, Chairs, Chests, Concealed parts (Furniture), Concrete formwork, Construction, Crossties, Decks, Desks, Dining-room furniture, Docks, Dockwork, Domestic flooring, Dowell pins, Dowells, Drawer sides, Factory construction, Fine furniture, Floor lamps, Flooring, Form work, Foundation posts, Framing, Furniture , Furniture components, Furniture squares or stock, Harbor work, Hatracks, Heavy construction, Joists, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Marine construction, Naval architecture, Office furniture, Parquet flooring, Porch columns, Radio, stereo, TV cabinets, Raft floats, Rafts, Railroad ties, Rough construction, Rustic furniture, Shipbuilding, Stools, Sub-flooring, Tables , Utility furniture, Wardrobes, Wharf construction
Region: Central America
Country: Guyana
Distribution: Species in the genus Caryocar are reported to be widespread throughout most of the Amazonia. Those of commercial importance are reported to be distributed in Costa Rica and southward into northern Colombia. They are also found in the upland forests of the Amazon valley, as well as eastern Brazil and the Guianas. Also widely distributed in northeastern Peru, attaining its best development in forests free from seasonal floodings.
Numerical Values for: Caryocar glabrum
Category Green Dry Unit
Bending Strength 12450 17060 psi
Max. Crushing Strength 6290 8410 psi
Stiffness 1820 2160 1000 psi
Hardness 1720 lbs
Specific Gravity 0.72
Weight 55 lbs/cu.ft.
Density (Air-dry) 54 lbs/cu.ft.
Radial Shrinkage (G->OD) 5 %
Tangential Shrink. (G->OD 8 %
Volumetric Shrink. (G->OD 13 %
Tree & Wood Descriptions for: Caryocar glabrum

Product Sources		 Some material from this species is reported to be available from environmentally responsible sources.The International Tropical Timber Organization (ITTO) reports that timber from the species is produced frequently but export is rather low.

Tree Data		 The trees are reported to reach heights of 120 to 150 feet (37 to 45 m), with trunk diameters ranging from 36 to 48 inches (90 to 120 cm) in Colombia, to 5 to 7 feet (1.5 to 2.1 m) in the Amazon valley. They develop well-formed and cylindrical boles that are up to 70 feet (21 m) long.

Sapwood Color		 Sapwood is described as white or pale yellow, occasionally with dark or almost black streaks, and is not always distinct from the heartwood.

Heartwood Color		 The heartwood is yellowish to light grayish brown in color.

Grain		 The grain is frequently interlocked. Very fine and faintly distinct silver figure is reported to be occasionally present.

Texture		 The texture varies from medium to coarse.

Odor		 Green material may have a faint odor of vinegar, but seasoned wood has no characteristic odor or taste.

Natural Durability		 The heartwood is reported to be very resistant to attack by both white- and brown-rot fungi. It is resistant to dry-wood termites and moderately resistant to marine borers.Resistance to ImpregnationThe timber is reported to be generally difficult to treat with preservatives.

Strength Properties		 The bending strength qualities of this species in the air-dry condition is very high, far superior to those of Mahogany. Compression strength parallel to grain in the air-dry condition is high. Teak, White oak, and Hard maple have high crushing strength. It is hard – harder than Teak, and does not marr or dent easily. The weight is very high. The wood is very dense.
Working Properties for: Caryocar glabrum

Cutting Resistance		 The wood is reported to be moderately difficult to saw. Internal stresses may be present in logs.

Blunting Effect		 Cutting edges are reported to be dulled quickly because of interlocked grain.

Planing		 Caryocar timbers are reported to work with moderate difficulty in most machining operations, including planing. Smooth surfaces are reported to be rather difficult to achieve on radial surfaces, and material containing interlocked material tends to dull cutters rapidly.

Gluing		 The material is reported to require care in gluing.

Nailing		 Nail-holding characteristics are reported to be good.

Staining		 The material is reported to require care in most finishing operations.