No... I did not collapse any structure.. it is placed right next to the pass n gas in the desert biome heading west, just after the bridge next to the river... The structure is built as follows... The "posts" are cobblestone block, 5 blocks high, and the gap between posts is 6 blocks... So including the posts, it's a total of 8 blocks... I filled in the floor/ ceiling (depending on whether your above or below ) and started with the walls for the actual building with the same math.. blocks are 5 high, 6 blocks apart, 8 total... The second row has 2 or 3 blocks missing in the middle where I had placed glass panes... I built this structure after I had the issue at the farm with my concrete blocks never drying, so I went all cobblestone... I came back down and it's just randomly falling apart and now I cannot place anything there... I built a full wall behind it to keep everything out, but even the new wall won't support blocks there either... And more fun facts, when I try to stand on the iron bars I have placed for the spider guys, the bars fall now under my weight as well... This is 2 structures that have been fowled up and I don't know why