Aerodoug
Pallet of fence posts . Posts 2 m long, height about 80cm width about 80cm weight approx 450kgs.
Line length 35 ft to a swivel to a single hook. The posts were choked at each end ( that is 1 point at each end not each corner ) about 30 cm in from the end, going up to a single point. The load would not always be totally level, didn't spin that much but certainly rotated. It will depend on how it is stropped, just think of picking up a load on a single point but that point is not in the middle. You will then have different levers in terms of drag. If drag is equal on both sides of the load then in theory it won't spin !!!However !!!!!!!!!