Just sharing my version of a ant barrier for my hive stand.
The 4 legs also sit on concrete pavers under the mulch.
http://mikesfarm1.blogspot.com/2008/08/my-ant-barrier.html
And when those don't work just smear some vegetable shorting (not butter) or 3 in 1 oil (for lubricating saw blades) under them.
That setup looks nice.