Originally developed in Europe, self-tapping screws (STS) are one of the most effective connectors for mass timber buildings. To support the use of STS in Canada, development of STS design provisions for the Canadian Standard for Engineering Design in Wood, CSA O86, has been underway. While the design of STS connections in CSA O86 aims at connections that provide ductile behaviour during loading, brittle wood failure modes are possible to occur and therefore need to be checked within the design provisions. In collaboration with the research group at the University of Alberta (UofA) led by Dr. Chui, two testing phases were conducted. Phase 1 consisted of nine different groups of steel-to-glulam connections and nine different groups of steel-to-CLT connections, while in Phase 2 three different groups of steel-to-glulam connection and nine different groups of steel-to-CLT connection were conducted at FPInnovations. The aim of the research program was to verify the proposed design equations for brittle failure modes of STS connections in the CSAO86 draft provisions for STS design. This report summarizes the findings from Phase 2 of the test program. The results showed that for specimen groups with CLT, the calculated failure loads based on the proposed design provisions are too conservative and need to be improved. Good agreement was obtained between test results and calculated failure load and failure modes when full effective thickness was used. When specified design properties were used, consistent results were obtained when plug shear is taken as maximum of head tension plus bottom shear and side shear for connections with glulam and sum of head tension, bottom shear and side shear for connections with CLT. The information from this study will support code implementation of the STS connections in CSA O86, thereby providing more design options for use of STS in timber structures in North America.