Answer:
In the add-on modules RF‑/TIMBER AWC and RF‑/TIMBER CSA, only rectangular and round cross-sections can be designed at this time.
We are looking to expand the cross-section design capabilities in a future release similar to what the RF‑/TIMBER Pro add-on module allows according to Eurocode.
Therefore, design should be done manually for these types of cross-sections according to the NDS or CSA standards.