I have a dozen of these tied together, with the cross bracing, into an L in my basement. The whole unit has a few ties to the cinderblock wall behind it. That

I have a dozen of these tied together, with the cross bracing, into an L in my basement. The whole unit has a few ties to the cinderblock wall behind it. That arrangement adds a good bit of stability. I agree that a on their own or in small numbers they’re not very stable.