[Bryce2471]

Originally Posted by Nebster

What are you using to hold the corners of the frame together? It's not clear to me

This was a point of much discussion while in the design phase. We thought gussets would be stronger, but using blocks would fit with the chain in tube solution better.

Originally Posted by notmattlythgoe

There are blocks in the ladders with through bolts going through the rails.

This is what we ended up going with, partly because the belly pan is adding a lot of corner to corner strength already.

Originally Posted by Ty Tremblay

http://www.team221.com/order.php?cat=15

See "Chassis Tube Connector"

We did not use these, but they look to be functionally equivalent. The plastic blocks ended up being a good project for younger students to get some training and experience in.