This review is mainly to let anyone considering purchasing these know that they will indeed hold twelve 5-gallon buckets each, with or without gamma lids, three per each shelf. I've been wanting some inexpensive wire shelves to get my long term food buckets off the floor and not stacked upon one another and these are perfect.
Now, the shelves are about 35-1/2" long instead of 36" but they'll hold three buckets across if you kind of stagger them on the shelf. I've bought two of these so far and, like some other reviewers, I had a couple of shelves that were slightly bent. Easily straightened and they work fine. Just need a couple more and I'll be good to go.