Ryan,
very familiar with (used many times) the galv support brackets that are commonly used over an anchor bolt in the top of the pier. I know the quality of the hot dip (or brite spangled) and it ain't made for submersion over time, particularly since they are stamped from flat sheet leaving the edges unprotected. I can't go with the "slip it over a vertical rod" program because I need to have it anchored down....can't have it tipping in high wind or shifting ice. I was just fishin' (pardon/pun) for some outta the box ideas....or....as usual, somebody gives me a kick and points me at a product designed for exactly what I want and been in service for 50 years.