RePost My apologies if I re posted. My interest was the structural response for something that carries a relatively high local load. I agree the bulkhead shear may not be the only likely type of impact load. Behavior when run out of the channel up on a sand bar or dredge tailings might be interesting as well. There are plenty of examples of convention running gear running over the coral or up on a sand bar or in Scandinavia or Great Lakes - into Granite. I find it amusing that there is such denial of such events on this forum.