Quote Originally Posted by Robin Hewitt View Post
I keep getting a mad urge to drop a few chunky spiral reinforcement rods down inside the column of mine, then top it off with a rich cement mix. The rods are there ready for next time I'm doing concrete.

You have excellent access to plug the bottom of your column and do the same. Could be useful :D
And the benefit would be??? I'd imagine a modicum of additional stiffness? Kip is looking at a square column conversion for his which sounds interesting. He's apparently talking to an iron foundry, presumably because its too big a casting for him to do...