This plyometric box has three different heights (24 inch, 20 inch, 16 inch) and is made from one 4×8 sheet of ¾ inch thick plywood. A total of nine pieces will be cut from the sheet of plywood. Six of the pieces will form the outside of the box and the other three boards will be used as reinforcement inside the box.

Step 2

Next, measure the three panels that will serve as reinforcement inside the box. While it may not be entirely necessary, these are recommended for extra strength. One of the three panels will be measured at 22½ by 14½ and the other two will be 22½ by 8⅞ inches. Measure the panels, place marks at the measurements, then use a straight edge and a pencil to connect the marks to create a straight line to follow with the circular saw.

Step 4

After cutting the handles and sanding, it is time to assemble the box. Start by assembling the two 22½ by 14½ inch panels and two 20½ by 14½ inch panels to create an open rectangle shape. Add wood glue around each panel. Use a drill with a ⅛ inch drill to drill pilot holes prior to adding screws — this will prevent the wood from splitting. Continue around each side of the box using four 2 inch long wood screws at each corner. Slightly countersink each screw.

Step 6

Before placing the last/top 24×20 panel on the box, add the reinforcement panels. Draw a line down the center of the larger reinforcement panel (22½ by 14½ inches) and then offset each of the smaller reinforcement panels (22½ by 8⅞ inch panels) on either side of the larger perpendicular panel. One smaller panel will go on the left side of the line, and the other will go on the right side. By offsetting the smaller panels you’ll be able to add glue and screws for each panel.

Step 8

Secure the final 24×20 inch panel to close up the box. Use 220 grit sandpaper to smooth out the boards and remove rough edges. You could fill the screw holes with putty if you’d like. If you do choose to fill the holes make sure to sand away excess once it cures.

Step 10

Once the paint has completely dried, measure 1½ inches in from each side to create a border. Use painters tape to mask off the border, along with two whole side panels that will remain red.