Add Bench, table, and trellis tops
1. Cut five 2-by-4s and eight 2-by-6s to 95 inches long.
2. On each bench, center, space, and attach two 2-by-6s and one 2-by-4 between them, with the 2-by-6s overhanging the frame sides by about 1 inch. Space and countersink two 2 1/2-inch screws at each board intersection.
3. Alternating the 2-by-6s and 2-by-4s, attach the tabletop, with the 2-by-6s slightly overhanging the frame sides. Notch the outer 2-by-6s and the adjacent 2-by-4s to fit around posts.