One LARGE Project - Steel Mini Mill

[tomustang]

That's some impressive bracing. I'd attempted to brace the inside of a large DPM modular wall with .25"x.25" strip styrene with little luck. Still produced a noticeable curve. What exactly did you use?

I had many strips of basswood I used this time around, while using superglue to hold in place.
The strips were between 1/16X1/4" to 1/16"x3/8" strips. I braced at the top and center of the double sashes and then again where the single sash meets the doubles. Once the wall sections were finished I made the end frames so the four corners would be square, I didnt worry about the bowing at this point. I didn't brace the bottom since I'm not set on putting a full floor in. For that I glued in five 1/4" thick by 2" width plys, but If I do put a full floor in it'll show a much flatter surface.