Frame the deck support system and joists using Figure A as a guide. Start the decking by laying two deck boards at right angles along two adjacent sides, mitering the corner. Lay the deck boards perpendicular to the joists. Keep them parallel by snapping a chalk line for reference about halfway across the frame.
Picture framing gives the deck a more finished look-there are no raw cut ends. Begin decking with two perimeter boards,mitering the corners and overhanging the trim by 1 in. Screw them to the frame with 3-in. deck screws.Cut the first deck board to length and install it. Butt each deck board to the framed edge and trim the other ends evenly after they’re all installed. Be sure you keep the decking straight. Anything out of line will be especially noticeable where the front wall of the house sits on the deck. Rip the last board to fit, trim the butt ends and then finish with the last two perimeter boards.