Phase 4 deals with the back of the flower box and its a pretty simple step. I could of done the back the same as the front but I opted just to use a solid wood panel for the back panel as it will not be seen since its going to be mounted to a fence.
Here are the Steps I took in making the back:
As you can see by the diagram the back panel is basically 3 pieces. Atop and bottom rail and a center panel. I chose to use a pressure treated panel for the back as it will not be seen but the rails are both made from cedar.
THE BACK JOINERY
Basically the joinery is the same as the rest of the box. I added tenon’s to the left and right ends of both rails as that joint will be used to house the back into the left and right sides. Both rails also received a groove that will hold the center panel. The groove as you can see is centered on the rails thickness and is 1/4” wide x 3/8” deep. The back panel itself also has rabbet’s cut around all 4 sides of the panel on both the front and back faces this created a tongue that will then fit into the rails and sides of the window box.
ALL MILLED UP
Here is an image of the back all milled out and ready to be glued together. The only parts of the back that are glued are the tenon’s on each end of the rails, the panel floats inside the grooves in the rails to allow for seasonal movement.
EXPLODED VIEW OF BACK
Here is an image at a different angle of the backs components, you can also see the tongue that go around the entire perimeter of the panel. This panel doesn’t really get any glue until I am ready to glue the box together.
Phase 4 is a wrap and it really didn’t take that long to do, there was not even a glue up to do as this does not happen until I am ready to do the window box glue up.
Next up is making the bottom supports and base