On Tue, 31 Aug 2004 21:44:02 -0400, Sunny wrote:

I doubt the cleat screws will break - is that
your concern?

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That, and working loose from not being thru bolted. The shock loads
imposed by a heavy boat bouncing around are considerable - well into
thousands of pounds. Would you be comfortable if your heaviest boat
dropped vertically by a foor or two and was caught by the cleats?
That sort of loading is fairly routine in rough water.