jiju1943, moja is in a seismic zone in Romania.

moja, you probably should have posted in your previous thread just to avoid any confusion:wink: California uses 3 1/2" x .162", which I believe is closer to 4mm. Not very many guns will handle that nail, though. Bostitch has one, I'm not sure of the model #. Have you looked into hold downs and tie plates yet? Reinforcement of your connections is just as important, if not more so, than nail size.