Failure criterion of block shear strength of timber parallel to the grain

This paper described the block shear strength of the timber for timber joints. It was found that the criteria of the block shear failures, in the timber joints, was affected by the the partial compression stresses parallel to the grain on the bearing parts. We derived the new strength calculation method of the block shear failuer of timber taken into account the partial compression stresses parallel to the grain on bearing parts or embedment. The validity of the proposed calculation method was confirmed by the experimental results.