Motorhomes float not and it takes a biiig tractor to fish em out.
The relief cut works if its put in early, before the check finds another place to relieve the drying stress. I built a log home that had been kiln dried, then their planing equipment also relief cut it... the check had already happened.
I was reading last night, not sure if or how it applies. A concrete column can be reinforced either by standing vertical rebar and placing individual loops of rebar around it or by spiraling a continuous rebar up the vertical rods in the column. The spiral column is slightly stronger.
