A deck board supporting system includes a plurality of interconnected skirt joists configured as an outer perimeter of the deck board supporting system and a plurality of deck joists configured to be attached to one or more of the plurality of skirt joists within the outer perimeter. Each of the skirt joist and deck joist has a respective longitudinal groove formed on a respective top surface, and the longitudinal groove extends downwards perpendicular to the respective top surface. The longitudinal groove is configured for receiving one or more fasteners for connecting one or more deck boards to the top surfaces of the respective skirt joists and deck joists.