So you want a bolt in roll cage... check this out, YIKES!!!!!!!!!!!! Options

[GaroldShaffer]

Story: the car ramped up the tire wall, then nose-dived into the turf and flipped lengthwise. The bolted-in roll cage didn't have big enough floor plates and they punched through the floor, completely failing to provide protection to the occupants! Somehow, neither driver nor passenger sustained injury!

Bolt in cage

Just another reason why you shuoldn't skimp on safety equipment if you plant to go on ANY track! Take a good look at pciture #8.

[charliew]

Thats just a bad installation period wether it's welded or bolted. It's hard to tell how that particular roll cage was fastened to the floor. There can be a well fastened boltin cage. It will require a good pad that has a large surface area to spread the load over a large area on the sheetmetal. Bolted or welded if the pad is large enough I think it will be strong enough. In the case of boltin if a equal size pad is on either side of a single wall sheetmetal floor it will be at least as strong, and probably stronger as the weld will create stress at the sides of the weld bead, as a welded to only one side of the same sheetmetal floor.