A Note on The Hankinson Formula

K. Y. Kim


Recent tests at the Weyerhaeuser Company Technology Center were aimed at determining the applicability of the Hankinson Formula for predicting the strength of wood loaded in tension at angles to the grain. Small specimens cut at varying grain angles were loaded in tension at a rate of 0.1 inches per minute. A stress versus grain angle plot of the data revealed that the Osgood Formula, a generalization of the Hankinson Formula, provided a better fit and that both could be applied in tension as well as compression loading.


Hankinson Formula;Osgood Formula;grain angle;dog-boned

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