Dinghy davits problem 3607

You'd need to weld a vertical member to the base that transfers that rotational load to the primary rub rail a couple of feet below your install point. That's your nearest point of any strength in that build. Agreed that the back side of your mounting blocks need to remain or become strong. The glass is flexing now with a modest load. Movement and perhaps some inadvertently trapped rain water inside of whatever you're hanging is gonna give you a headache in short order.

Agreed. That's what my eye sees here, much more of a rotational load issue than a down force issue. Although the down force is still a significant factor that needs to be addressed with backing plates, perhaps, if not done already. Otherwise, get that rotational load to leverage against the stronger area of structure where the cap meets the hull. Perhaps that mount uses a block placed just below (immediately) the rub rail, and welds to the aluminum arms where it picks up that load. I'd assume that structure where he has these mounted is rather flimsy. Those davit arms provide a lot of leverage to the weight of the load to magnify against that small block and weak structure.

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