I have been pouring over all the info, links, and pictures in this thread and have learned quite a bit. However, I am new to building a roll cage and have a few questions. Bear in mind that I am not doing hill climbing or rock crawling in my present area but I recognize that the stock rollbar on my '78 CJ-7 isn't going to cut it in a rollover.
1. Tie ins. and bolt-ins.
Do the bolt-in cages just bolt to the body? Also I see a lot of tie ins from the frame going up to the body and ending with a plate to which the cage will bolt onto on the other side. This, I think, will be the route I will go but i was wondering if there are any important defects in this design. A set of 4 or more grade 8 bolts would be used in my design to anchor each plate to the other.
2. With the cages that are bolted to the tie ins off the frame, is there a possibility of body stress cracks becoming an issue?
3. Body Seperation
If I get into a serious enough accident, even with my new body bolts and poly bushings, the body may sheer off the frame. My anchor points for my belts and seats then become my concern since if they are attached to the body, I get hurt/killed should the tub and frame part ways. Am I correct in assuming that hte only way to fix this problem is to incorporate the seats and belts into the cage?
4. Design and what is available to me:
I have got this nice stock CJ-7 roll bar in my Jeep right now. I want to keep it where it is but tie it to the frame and add gussets where the tubes meet at the top. Then I want to install a front hoop tied to the frame. Then I plan to install tubing to connect the front and stock rollbar together, which now that I think about it would be similar to a YJ cage. I would incorporate diagonal tubing (triangulation?) to strengthen the cage where ever possible. Can anyone see any possble problems? I think I have covered all the bases, A pillar, B pillar, and strength.
Any input and info is appreciated