There's a 2" tube frame that the tub sits on, and the porthole in the tub just obscures the rear tube, so if I want to have a roll bar coming straight up and out I need to either offset it forward by 2" (as in this design) or I'd need to have an internal bend.
I used a plate in the design, because I'm not sure how else to do this, but maybe that's okay. I'm not sure about the gussets either. Maybe I need an internal frame around the passenger too? I'm not expecting to protect anyone from a massive crush injury, but just to protect someone's head in the event of a rollover.
I'd definitely appreciate any design feedback here!
Posted 3/12/2015 4:19 PM (#83339 - in reply to #83337) Subject: Re: Designing a roll bar
Location: Minneapolis, Minnesota
Just my opinion but a combined rollbar and bumper that was all external to the tub would be a better solution and would require no holes in the tub. If I'm remembering correctly, you've already got the start of a surrounding bar. Carry the bumper around the back of the tub, weld a hoop to that and a stay from the top of the hoop down to the back of the surrounding bumper. Or is picture from post 83313 a different sidecar?