On Nov 5, 10:02*pm, Ted wrote:
I have a large window I need to cover with plywood.
My brain says it can't be done without putting a strip before the
sheet and just make 3 equal pieces. *Maybe someone can suggest
something easier. *(It would be nice if I could get a piece of plywood
58.5 X 51.

The window is 58.5" high. *The two side windows are 28" wide and the
large window is 51" wide.

http://i37.tinypic.com/25oymgz.jpg*sketch of window

Make your own sheet to whatever size you need.

Cut the standard sheets to whatever size it takes to make up the
"sheet" you need. Screw the cutoffs (or other scrap material) to the
face of the plywood to cover the seams and create one large piece. The
advantage is that the single piece will lay flat against the mounting
surface.