Notice how the fascia board that surrounds the main deck joist framing is a 2x10 or 2x12. It sits higher than the joists.
This allows the stone pavers to sit either flush with
the fascia board or slightly proud above the edge but still held within
the perimeter of the deck.
And here is another deck showing the old weathered wood
deck boards. The boards were removed and the modular grating was
installed over the framing as shown here.