Stiffness and ultimate slip of timber joint composed of a few driftpins with steel inner plate

We, in this article, propose a manual calculation method for the stiffness and ultimate slip of the timber joint composed of a few drift pins. The effect of the clearances between the holes and drift pins on the stiffness of the joint were modeled as the extreme-value distribution of each clearance. The effect of the number of the drift pins on the ultimate slip of the joint was modeled using the weakest link theory of the ultimate slip of the joint, and the effect of the concentrate tensile stress perpendicular to the grain at the timber parts between the drift pins on the ultimate slip of the joint was mechanically modeled. The validity of the proposed calculation method was confirmed by the experimental results.