: That sounds like enough wood in a sheet to not worry. I already have a little
: under 1/2 size or so sheet of good quality plywood sitting in my basement
: that I thought I could sqweeze the sections out of it...

Draw out the frames on paper first. Trim these patterns close to the cutting lines and lay them on your plywood, assembling them like loose-fitting pieces in a jig-saw puzzle. It is plywood. You don't need to worry about grain orientation. If you still need a little more wood, you can buy 'handi-panels', or 2x4 foot pieces.

Making each frame from two or more pieces is certainly possible. Again, draw out your plans on paper. You'll need to modify the drawings to allow final parts to overlap so they can be joined with glue and bronze or stainless steel screws. Brass screws are expensive, and too weak. Regular wood screws or treated deck screws will work for a few years, but eventually rust.

The cost of fasteners may be more than a small piece of plywood. Consider also the added time of cutting more pieces and joining them.

If you take your idea a little further, you can make the frames from pieces of 1x3. or 1x2. Overlap them and screw them together, or butt them together and reinforce the joint by overlapping it with 'gussets' made from small pieces of thin plywood.

PGJ