Step F: Install the Aprons & Slats
1. Apply glue at each end, on the bottom sides, of the attached slats. Flip the leg and trestle assembly, and position it flush with the aprons so that it rests on the glue on the bottoms of the two slats. The aprons should extend 1 1/2" beyond the legs at each end of the bench. Drive 2 1/2" deck screws through the braces and into both slats.
2. Position the middle brace between aprons, centered end to end. Attach it to the two side slats with glue and deck screws.
3. Position the six remaining slats on the braces, using 1/2"-thick spacers to help you create equal gaps between them. Attach the slats with glue and drive 2 1/2" deck screws up through the braces and into each slat.
4. Sand the slats smooth with progressively finer sandpaper. Wipe away the sanding residue with a rag dipped in mineral spirits. Let the bench dry. Apply a finish of your choice -- a clear wood sealer to protect the cedar without altering the color, or stain to provide deeper color for the cedar.