I just came back to the game after ~6 months and i already had around 190h. I used to build a lot back then and I don't know if its just me or did they update the static/support system when building roofs? They seem to collapse way to easy, even when i put a pillar for support right under it. Also I have structures collapsing for now reason, like I build two identical side of a roof and one side stands with no problem and the other has one collapsing piece. I carefully watch that my structure has enough support but something is always wrong.