24. Check length then lay out frame

Check the size of the newly cut brace, by placing the board in the frame (see top photo).  Re-cut board if it is too big. 

Now mark where your mid brace/s will go.  Again - we have two mid braces, you may only have one.  If you only have one, find the center and make a mark.  We are putting ours two feet in on both sides.