Cut the apron to the width of the frame. Set the circular-saw blade to 5 degrees and rip a 1½-inch strip off one edge. This cut produces the beveled apron and a slanted cap for it. Prime both. Position the apron on the front of the frame, flush with the bottom of the stiles, and drive 1 5/8-inch stainless-steel trim-head screws through it and into the frame. Position the cap with its beveled edge against the frame and its narrow edge against the apron's bevel, as in the diagram at right. Screw it into the apron.