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TROPICAL HARDWOODS

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There are two "Lapacho's" listed in the Wood Handbook (USDA FPL Handbook
No. 72), however both give about the same shear parallel to grain
(horizontal shear) values.

Green:  2,140 psi or 2,050 psi
12% MC  2,280 psi or 2,070 psi

By comparison, DF(Coast) has shear parallel to grain values of 900 psi for
specific gravity of 0.45 and 1,130 psi for specific gravity of 0.48 (same
reference).

These are *ultimate* values.  I would use ASTM D245 procedures for
determining allowable stresses.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona