This is a picture of the chainplates on a well know quality production sailboat. The appear to be heavy duty and well constructed, The photo was taken before the liner and deck is bolted on. The question will be, in twenty years from now, how is the new owner going to replace them. Is this why God invented sawzalls'.
Now this is one of the main back stay chainplate on the W42. Nice design, it took me about 20 mins. to remove both (what can I say, I work slowly).
The removed chainplates looked to be in good condition however its worth noting the head of the righthand bolt.