[Gdeaver]

Team 104 made a box frame like this the last 2 years. The frame was made out of 8020 Quick Frame 1/16" box tubing. We also used the associated plastic connectors. In a couple of hours we cut and whacked our frame together. We had no failures or structural issues. We did use polycarbonate covering and other structures to tie everything together which is critical. We used dead axles. The axle supports were made from 8020 10 S 8611 double retainer profile . The axle supports clamps onto the frame allowing the chain to be tensioned. For the axle span 3/8" grade 8 bolts work well and save weight. The bottom board also is a structural part of the frame. A piece of 1/4" Baltic birch plywood would be a good choice. To go one step further, laminate the board with a layer of 5.7 OZ carbon cloth on both sides. This type of frame is good for low resource Teams.