![]() The material used to tie the stands together should be at least 3/16-inch chain. Secure each pair of stands across the boat with chains (3/16-inch minimum) to prevent the stands from sliding out. Apply boat stand(s) so that, after the blocking operation is complete, the stand screw can still be adjusted up and down. Stands should not be used as jacks to raise or lower the boat. Do not place blocks on top of boat stands to increase their reach. On vessels with extreme overhang, forward or aft, a stand should be placed under the overhang perpendicular to the centerline. Do not block more than two legs of a stand. Sometimes it is necessary to tip the stand to make it perpendicular to the hull. Install stands as far outboard as practical and with the adjusting screw as close to perpendicular to the hull as practical. Some boats require that the weight of the boat be supported on the chine. Do not use stands to support the weight of the boat, other than keel stands specifically designed for this purpose. The boats weight should be borne by the blocking. The angled stands are there only to provide balance. Powerboat stands should be set with the aft pair placed as close to the aft end of the waterline as structure permits, and spaced no more than 10 feet apart. The stands should be spaced no more than 10 feet apart, with the forward-most and after-most pairs of stands no more than 10 feet from the ends of the waterline. The American Boat and Yacht Council is explicit about how jackstands should be used for recreational craft. Boats 31-40 feet should use 6 x 6 x 18-inch blocks, and boats 40 feet or longer should us 8 x 8 x 18-inch blocks not more than 5 feet apart. Boats 30 feet or less can use several solid wooden blocks 4 x 4 x 18 inches. Never block the keel more than 2 blocks high, and one is much better. According to ABYC, there should be at least two blocking points a single blocking point can allow the boat to rock fore and aft. Additionally, substantial weight on the keel prevents shifting of the keel in a beam wind. Most of the weight should be on wooden blocks, with the stands serving only for balance. But you will need to buy the stands and know how to move them when needed (remember to buy an extra pair-this is required to move them safely). ![]() A few of you will have the boat transported home by hydraulic trailer and blocked by pros very handy if you have a lot of work to do. Maybe it will stay on the trailer, but maybe you want or need to move it off to get the work done. Some of you will trailer your boat home for the winter. The yard will do the moving, but its helpful if you understood what they can and cannot do. On the other hand, some of you will need to have stands repositioned to perform bottom work. Those are good rules, and nothing we are about to say is meant to contradict them. Your sole involvement is reading a warning in the lease agreement that you will not touch the stands and that you will not attach anything to them, including tarps. A travel lift or crane plucks the boat from the water, and yard guys block the boat for the winter. Were guessing 90 percent of sailors have their boat hauled by a yard.
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