Chilliwack, British Columbia | We split our old 40' bunker years ago with blocks, went 5 high (12.5'), not a real problem, but it does lean when you get it full, but with a roof we can only go about 11' high. This is with no supports on either side, just a straight up 80' wall. Only went that high to prevent spilling over to the other side, the roof on the bunker keeps us from going any higher with the silage. Would personally never do another like that again, too much waste in the seams, even with plastic. Ours have a taper the blocks meet, I have seen others in other places where the blocks are perfectly square, so that should be less of a problem.
In short, it works, is cheap, but there are better alternatives, if you don't mind spending the money.
Glenn |