I agree with Eldir and daveor. You have to "fit" them in the right place in order to get the proper amount of tension. You found out from your broken bed frame what happens when there not in the proper place. I too had to make a couple of dry runs before getting them right and once I figured that out, they have worked flawlessly. Might I suggest installing small corner "L" brackets on the corners (top and bottom) of your bed frame so that it doesn't tend to pull out again. I'm of the opinion that "I would rather have it and not need it than need it and not have it." Good luck to you!