I have seen references to spreader bars in various posts on the forums. As we are about to have our fat yacht lifted out by a crane using conventional slings via 15' chains to a single hook I can see that the hull is going to be squeezed as it is lifted. Do the bars go at deck level and take the strain from the toe rail. Or are the fitted at the top of the slings making the strops U shaped and thus clear of the toerail. As our club will not interrupt the lift for one boat to have bars fitted at the top of the slings (or buy the bars). I thought about using acrow props to force the strops apart at deck level, as the strain is taken up. Anyone any thoughts?