With this new corner brace, I expect the end boards will last considerably longer than just bolted wood. Time will tell.
Step 7: Replacing A Rotted End Piece
I have replaced several of these pieces, but they continuted to rot out. Hence the corner brace of concrete. Replacing the piece is simply a matter of unbolting the old piece, cleaning up the area so that the new pieces can be put into place, and installing the new corner braces.