01-21-2009, 08:35 PM
Rob, you could use a 1x2 & a 1x3 glued and nailed in an "L" shape. It is what Lynn Westcott coined "L girder benchwork." Once the glue has set up good (24 hours), go ahead and screw the plywood to the upside down "L" on the 1x2. The 1x3 & 1x2 together are very strong structurally. Paint the L girders after they are glued but before they are installed and they should never warp.