My friend sent me a picture of one of your powerhammers (pettingell no.2, I think) and it has a wooden column. For some reason wood makes sense to me, as if it would absorb the shock while remaining rigid, like the wooden handle on a hammer. I thought pettingells were all originally mounted on wooden beams anyway, but I get a lot of advice telling me to use steel instead. Most of the advice comes from people who do not own or operate sheet metal hammers. Any tips?