11. Measure, mark and cut bottom pieces (D) to length
from 2 × 4" cedar stock.
12. Turn the box assembly right-side-up, and set the bottom
pieces into the planter so they rest on the cleats and are evenly
spaced.
13. Attach the bottom pieces by drilling pilot holes and
driving deck screws through the bottom pieces into the cleats.
14. Measure, mark and cut the frame pieces (E) from 2
× 4" cedar stock, mitering the ends at 45°.
15. Dry-fit the frame pieces together, with the miter
joints tight. Join the frame pieces with casing nails.
16. Cut top cleats (F) to size from 2 × 2" cedar
stock. Position the cleats on the assembled frame so the edges
are flush with the inside edge of the framing pieces. Drill pilot
holes through the cleats and attach by driving deck screws through
the cleats into the frame.
17. Position the frame on the planter so the cleats fit
tightly inside box. Attach the frame by drilling pilot holes and
driving deck screws through the inside face of the top cleats.
18. Soften the corners and edges of the box planter with
a rasp, then apply a finish of your choice; our planter is protected
with a coat of clear sealant-preservative.