What do the frame dimensions need to be?

[Bee]

Please see this thread:

80 Dollar, 60 minute Frame Build aka 80/60

I’m going to name my design “the $80 build” Less than 90 minutes with Documenting - I will say it will be under 60 minutes. Screw count 9 - This is a minimum build but I believe it will work. It’s designed to mount the work to the frame and have it flush with the outer edges for full access to the entire sheet. 2- 12 ft boards 1 - 10 ft board 1 - 8 ft board 1 sheet of wood . 3/4 inch thick Note there are 2 side pieces and 12 screws not in place. The top mount is deviated from the drawing…

Thank you