anti-roll bar

[rficalora]

I need to shift my roll bar forward of where I'd mocked it up.  How much stress goes on the fasteners that hold it up by the frame rails -- e.g. can I use riv-nuts (nutserts)?  Other option is to use some plat to offset the mounting holes with bolts going from the bottom up to hold the plates to the captive nuts in the frame rails & from the top down to mount the roll bar brackets to.  If I need to go with plate, is somthing like 3/16" or 1/8" sufficient?

[Bill Young]

3/16" plate should be sufficient with a bar up to 1" for anything larger I'd go up to 1/4" plate. Riv-nuts in steel should do well with a 3/8" bolt. I'd be doubtful using aluminum riv-nuts. If you can drop the bar about 1/2" I'd suggest making plates from some 1/2" aluminum stock and use countersunk allen head fasteners to mount it to the frame and then just drill and tap it for the other bolts that hold the bar mounts on.