4. You will drill and rivet one corner of each panel to start with. So, drill a hole through the metal and plywood at one corner of the first panel. Skip to step 5. Then repeat for each corner at a time. Once each corner is riveted in place, repeat the process for the remaining two panels.
Tip: If you are using saw horses as a surface, clamp a scrap piece of wood underneath every hole that you drill. If you are working on the ground, simply place the scrap piece of wood underneath each time you drill. This will keep the plywood from blowing out and splintering on the back.