[Zac]

The 4 main plates that make up the frame were 0.25" aluminum (edit: the outside plates were actually 3/16" thick for weight). 0.25" plates support bearings very nicely. Additionally given the rough nature of the game we felt comfortable with 0.25" as it was a thickness we had used before. We did lighten the plates fairly aggressively. Given that just being able to drive in stronghold meant being able to score many many points it seemed like a reasonable place to spend some of the weight budget.

Additionally these plates are very much an integral piece of the robot, it seemed as though every shaft of every mechanism found its way through one of them. These plates were responsible for many center to center distances for the 20-something (26? 27?) timing belts on the robot. We didn't want them bending, because replacing them was all but impossible in a FRC environment.

Elsewhere on the robot, you will find thin walled tubing. The climber mechanism is 0.0625" wall thickness, for each of the 3 tubes on each side (2x2, 1.5x1.5, and 1x1)

Additionally there is a 2x2 that connects each side of the drivetrain, also 0.0625" wall thickness.

~Zac