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Woodworking Math

Tropical wood · Tropical America

Sali wood

Sali (Tetragastris spp., family Burseraceae) is a tropical timber from tropical America. Dry, its Janka hardness is 1,770–2,170 lbf (7,873–9,653 N), and air-dry it weighs about 48–61 lb/ft³ (769–977 kg/m³). The figures are from the USDA Forest Products Laboratory's Tropical Timbers of the World, pp. 301–302.

Other names, by country: Masa, Palo de aceite (Puerto Rico), Kerosén (Nicaragua), Palo de cerdo, Aguarrás (Colombia), Haiawaballi (Guyana, Gommier, Encens rouge (French Guiana), Almesca (Brazil).

Key numbers

Janka hardness, dry
1,770–2,170 lbf (7,873–9,653 N)
As printed: “Janka side hardness at 12% moisture content 1,770 to 2,170 lb.”
Air-dry density
48–61 lb/ft³ (769–977 kg/m³)
Basic specific gravity
0.63–0.78 oven-dry weight, green volume
As printed: “Basic specific gravity (ovendry weight/green volume) varies with species from 0.63 to 0.78; air-dry density 48 to 61 pcf.”
Shrinkage, green to oven-dry
8.5% tangential
Radial 4.4%, volumetric 13.9%

One source: USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, 1979 edition), the only published source read for this wood

Strength

Bending strength is the modulus of rupture (MOR); stiffness is the modulus of elasticity (MOE); crushing strength is compression parallel to the grain. The sheet collects these from published tests: it prints 5 data sets, from different tests and sources, so they can differ widely; all are shown, in the sheet's order, each at the moisture content printed beside it, never restated as 12%.

MoistureBending strength (MOR)Stiffness (MOE)Crushing strength
Green12,380 psi (85 MPa)1.65 million psi (11.4 GPa)5,460 psi (38 MPa)
12% MC16,090 psi (111 MPa)1.89 million psi (13 GPa)8,380 psi (58 MPa)
Green12,300 psi (85 MPa)1.94 million psi (13.4 GPa)6,800 psi (47 MPa)
12% MC15,200 psi (105 MPa)2.18 million psi (15 GPa)8,300 psi (57 MPa)
12% MC19,400 psi (134 MPa)2.41 million psi (16.6 GPa)10,200 psi (70 MPa)

A dash means the sheet prints no value; none is filled in.

What the data sheet says

Color, grain and texture
Heartwood orange-brown; rather sharply demarcated from the yellowish-brown sapwood. Luster medium to rather high; texture fine; grain mostly irregular to distinctly roey; without distinctive taste, but with fragrant balsamic scent. A silica content of 0.13% is reported.
Working properties
Reported to be moderately difficult to moderately easy to machine, varying with species. Steambending characteristics are fair to good.
Durability
Heartwood is rated durable to very durable in its resistance to both brown-rot and white-rot fungi, but only somewhat resistant to attack by dry-wood termites.
Uses
Heavy construction, flooring, furniture, interior trim, slack cooperage, railroad crossties. Suggested as a substitute for birch and maple.
Where it grows
West Indies, Central America, and northern South America. Widely distributed and locally frequent in the high forests of Surinam.

Quoted from Tropical Timbers of the World, pp. 301–302, a USDA Forest Products Laboratory work in the public domain.

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Sources

  1. USDA Forest Products Laboratory, Tropical Timbers of the World (Chudnoff, USDA Forest Products Laboratory, 1979 edition), read 2026-11-07.

How the tags work: How we source every number.