C. Install the front and rear rails (2) at the same height as the side rails (3).
Attach the strips in the same way as in the previous illustration.
D. Attach the support strips (4), first bend the ends 90 degrees and push the strips through the corresponding
tabs in the middle of the front and rear strips (2) and then bend the tabs further to secure them.
E. If you want the board as a half-height variation / workbench, repeat steps A to D for the second half of the board
and skip step F.