I have a couple of questions about roll-cage construction that I'm wondering if someone can answer:
When welding a cage together, he competition code seems to strongly recommend arc welding, and specifically heliarc welding. Does this exclude MIG and TIG welding, or are they all considered part of the arc family? If it does exclude them, could anyone tell me why?
the other question I have is...I intend to use the autopower U-weld cage kit. This kit builds a cage, using their bolt-in race-roll bar as a base. On my version of the roll-bar, the horizontal and diagonal supports are removable, and thus are bolted onto the rollbar with grade 8 bolts. Is this sucfficient to pass tech for race-group, since these supports are not welded in? If they were to be welded onto the bolt attachment plates, would this be sufficient to pass tech? I've been warned that even though the bolts are quite solid, they allow for a certain amount of movement, and so I will probably be welding them to the bar, as well as welding up all the joints which are now bolt-only to help chasis stiffness, but want to make sure it'll pass tech before we start welding.
Here's a link to the U-weld front cage kit:
http://www.autopowerindustries.com/rollcages.asp
Here's a link to the Race Rollbar baseunit It also shows the construction of the bolt-in sections:
http://www.autopowerindustries.com/rollbars.asp
Thanks
Graham