Determine the available space for the scroll saw table. The throat, or space available on the saw for cutting wood, can range from 12 to 30 inches. You might also need table space for laying out wood sections.
Measure two sections of 2-by-6-inch pressure-treated lumber to the width of the table, and two sections to the length of the table, with a measuring tape. Cut the sections to length with a circular saw. Miter the ends of the sections at 45-degree angles with a miter saw.
Assemble the width and length section in a rectangle to form the frame of the tabletop. Drill pilot holes through each corner. The pilot holes should be slightly smaller in diameter than the shafts of the wood screws. Insert and tighten 4-inch wood screws through the pilot holes with an electric screwdriver to secure the tabletop frame.
Cut four sections of 2-by-6-inch pressure-treated lumber to the height of the tabletop with a circular saw to form the legs. Lay the top frame on the floor and stand one leg inside the frame at each corner. Drill pilot holes through the frame into each leg and insert 4-inch wood screws through the pilot holes.
Turn the table over. Measure and cut two sheets of 5/8-inch-thick plywood to fit the tabletop frame with a table saw.
Place one of the plywood sheets on the tabletop frame and align the edges. Drill pilot holes along the perimeter at 4-inch intervals and secure the plywood to the frame with 4-inch wood screws.
Apply wood glue to the top of the plywood. Place the second plywood section on top and align the edges. Tighten C-clamps along the perimeter and allow the glue to dry overnight.
Remove the C-clamps. Sand the edges of the plywood with a palm sander to remove excess glue and rough edges.