Jay, and Listers,
When I raced my Corolla, the rules were that for bolt-in roll bars and
cages, each attachment point had to have a mounting plate of 20 square
inches area and 3/16" thickness, with a similar sized backup plate on the
other side of the sheetmetal.
For weld-in installations, the requirement was 20 square inches of 0.100"
plate, no backup.
On my Tiger I welded in a plate into the front corners of the parcel shelf.
The plates ended up being L-shaped to fit into the stamped depression of the
shelf, and to go past the fuel pump door opening on the right side. Then I
welded the roll bar to the plates. Sometime in its past life my Tiger had a
bolt-in installation similar to yours (judging by the holes drilled in
exactly the locations you describe) and I don't know how they would have
done their installation effectively.
Without the backup plates the bolts will pull through the sheetmetal when a
large load is applied. You have to decide whether it's going to be a 'roll
bar' or a 'show bar', and put in the appropriate mounting.
http://members.home.net/tsmit/rollbar.html
Regards,
Theo Smit
> -----Original Message-----
> From: Jay Laifman [SMTP:Jay_Laifman@countrywide.com]
> Sent: Monday, January 24, 2000 10:21 AM
> To: alpines@autox.team.net; tigers@autox.team.net
> Subject: Attaching Roll Bars
>
>
>
>
> Yikes! Where did the other end of those bolts go? Previously I carefully
> measured and placed my roll bar and drilled through the holes into the
> deck. I pushed through the bolts. This weekend, I finally went
> underneath
> to attach the plates and nuts. I was able to get everything on except the
> front bolt which disappeared inside a boxed section of the body. There
> are
> oblong holes through which I can see the bolt. But, they are not in the
> right place, to push up a socket with the nut on it. What do people do?
>
> Should I use a hole saw to cut a hole right underneath? Also, on the two
> bolts on the front right side, next to the battery box, those seem down
> right impossible. Even if I could get the nuts on - which I think I might
> be able to do, there is no wrench in the world that's going to get in
> there.
>
> Anyone been here done this before? Any suggestions?
>
> Finally, the instructions say not to worry about the pressed ribs in the
> steel, to just compress them. Does this bother anyone else? I bought
> some
> fender washers in the hopes of bridging the gaps. But, the way the ribs
> fall and the holes, they really won't work well.
>
> Thanks, Jay.
>
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