Date: February 13, 2001 at 15:14:29 From:Dave R, [dt1] Subject: Re: Need bracing /dampening advise for a large vented box
If you have access, you could substantially stiffen up the walls by adding ribs to the interior. (Kind of like 2x4 studs are spaced on a plywood wall in a house.)
Even 1x1's may be a starting point.
This may be a "lighter" option than a full sheet around everything.