Quote:
Originally Posted by MrForbes
We put some 2x4s on top of the bottom sheet of plywood, perpendicular to the 4x4 skids, so the robot chassis rests on the 2x4s, instead of the wheels. This makes the bottom of the crate pretty strong, too.
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We did the same. Using a house analogy, put the heavy items on joists, not the subfloor. The plywood/CDX should serve mostly to keep out the weather, not to provide support. The same should be true for the sides/top - hold the robot in place with a timber frame, and use the plywood for sheathing.