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Woodworking Math

Tropical wood · Africa

Scyphocephalium ochocoa wood

Scyphocephalium ochocoa (Scyphocephalium ochocoa, family Myristicaceae) is a tropical timber from Africa. Air-dry, it weighs about 36 lb/ft³ (577 kg/m³). The figures are from the USDA Forest Products Laboratory's Tropical Timbers of the World, pp. 505–506.

Other names, by country: Sogho, Ossoko (Gabon). SORRO

Key numbers

Janka hardness, dry
Not printed
Air-dry density
36 lb/ft³ (577 kg/m³)
Basic specific gravity
0.48 oven-dry weight, green volume
As printed: “Basic specific gravity (ovendry weight/green volume) about 0.48; air-dry density 36 pcf.”
Shrinkage, green to oven-dry
4.8% tangential
Radial 3.6%, volumetric 6.8%

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 3 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
12% MC11,600 psi (80 MPa)2.04 million psi (14.1 GPa)6,000 psi (41 MPa)
12% MC10,000 psi (69 MPa)0.97 million psi (6.7 GPa)4,150 psi (29 MPa)
12% MC11,200 psi (77 MPa)1.35 million psi (9.3 GPa)7,000 psi (48 MPa)

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

What the data sheet says

Color, grain and texture
Heartwood dark red-brown or orange-brown with some gray streaks; sapwood very wide, gray-buff, distinct. Texture medium to coarse; grain straight; wood contains a red latex.
Working properties
Saws well and works easily with hand and machine tools, planes to a smooth finish.
Durability
Heartwood durability is low and is liable to insect attack.
Uses
General interior carpentry work, joinery, flooring, furniture components, turnery.
Where it grows
Gabon and Cameroon; occurs in lowland rain forests often on swampy ground, also on abandoned farmland.

Quoted from Tropical Timbers of the World, pp. 505–506, 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.