Vertical connectors on Kit Bot chasis

[Billfred]

The best answer depends on what you're planning to do up top. Are you intending to use this upper part strictly to protect components below, or are you mounting a big heavy arm to it?

Probably the easiest solution in the former case would be angle aluminum (especially if you cut your frame an inch short on each dimension--if you didn't, watch out for your bolt heads). If you don't have room on the exterior of your frame, threaded rod might also work for you--I'd suggest spacing it off with some smallish-size PVC pipe.

(And as much as I love AndyMark's product and service, you'd probably save a bit of money doing that upper frame in angle if you didn't have some overriding reason.)

[smclean1969]

We are planning on putting our arm on top of the upper frame. Heavy is a relative term here and I think the total weight of it, including motors will be less than 25 pounds. Our minibot will also sit on top of the upper frame and that'll be another 10 pounds. So, not too heavy of a weight, but certainly enough that there will be a lot of stress on the upper frame during collisions or if the robot topples over.

[MrForbes]

Is there any way to attach the "stuff" to the main frame? it would probably be stronger and lighter, and you would not need to figure out how to attach two frames together.