I did a Tansanian in the Langstroth deep dimensions and had the same results, a domino collapse. But others seem to have succeeded with the same dimensions. I went to a medium depth after that (basically a one by eight with a bottom on it which was 7 1/4"). I haven't had any serious problems with it. Seems like I had a comb fall off ones or twice in the last five years,or so, and always my fault, but never a complete collapse.