When I go to a yard and observe boats blocked up for bottom jobs etc. I wonder about the science of storing on the hard.
Getting ready to transport my boat for maintenance, I would like to hear from the experienced and perhaps about the science of securing a Commander 31 on the hard. Where do I place the stands? Where is there needed support of the keel? Directing the crane operator for lifting straps placement. These issues are probably second nature to some. I have already been the observer, but now I am getting ready to be in charge for the first time. Thanks, in advance to those who know and sharing their wisdom on the subject.
My 31' sat about 40 years balanced on two blocks of wood: one under the keel at the transom, and one a bit forward of mid-ship. The keel put some serious dents in those 4x4"s. The 31' Commander is light enough to do that, but I prefer three keel blocks, and four or six jack stands along the chines. I use thin plywood to pound and shim the keel blocks. Jack stands with oiled threads, and a long screwdriver or bar to turn the threads and tighten the pads under the chines. I do a lot of turning the jackstands, getting the waterline level and trying to even out the weight on each support.
My 31' Sports Cruiser has no structural bulkheads to carry significant weight. The engines, fuel tanks, and decks are mostly supported on the four stringers.