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Ute Roll Cages and mounting to the chassis
https://www.auszookers.com/forum/viewtopic.php?f=5&t=32027		 Page 1 of 1
Author:  tanshi [ Sun Apr 22, 2012 7:28 pm ]
Post subject:  Ute Roll Cages and mounting to the chassis
Ok, i am in the process of planning my tray and roll cage on my LJ ute. i have run into a problem that im hoping those in the know on here can give me some advice on.
As you will see in the pics below, the spare tyre takes up alot of the tray space. in front of it will be the fuel tank, (in the blue frame)

My issue is this. the back stays need to be between 30 and 45 degrees. however in these angles sits the spare wheel so i cannot run the stays down to the top of the chassis. I would rather not move the tank or the spare. i can run the cage down the outside of the chassis rails and get the angles that i need.

My question after that long description is. how should i best mount the back stays to the chassis??? i thought about drilling and crush tubing the chassis near the rear spring mount and running a heavy angle out ontop of the spring mount. In the future i would like to get this CCDA approved so needs to fit within their regulations

im open to all suggestions though.

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Author:  Red89 [ Sun Apr 22, 2012 8:39 pm ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
According to CCDA the backstays only have a minimum limit of 30 degrees theres no upper limit or are you basing the 30-45 degrees on something else.
Author:  tanshi [ Sun Apr 22, 2012 8:41 pm ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
45 degrees takes it to the end of the chassis.
Author:  Fatzook [ Sun Apr 22, 2012 8:51 pm ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
Knock a tube through the rear chassis cross member, same as we do with the front ones on sierras. Plug weld along the length of the crossmember. This will give an 'outrigger' for the rear stay to make contact with. Brace as required.

I have a few ideas as to how you could make a very strong, but removable mount back there, but its hard to explain over the interwebs.
Author:  tanshi [ Sun Apr 22, 2012 8:55 pm ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
oh nice i didnt think of that.!

removable would be better, I'll have to make time to chat to ya about it then wont i
Author:  Fatzook [ Sun Apr 22, 2012 9:25 pm ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
:wink:
Author:  31zook [ Mon Apr 23, 2012 12:57 am ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
You could run a pipe down at 30°, put a 90° bend in it, and mount to the chassis with 4 bosses. I Use these at work. It's a bit of 20mm bar with a 12mm thread in it. Meaning you could use hex head bolts, counter sunk into the plate and no bolts on the other side. With a diagonal cross brace on these pipes it would be heaps string enough, and tight enough to go around your tyre. Does your rear axle move enough to touch the spare when flexing?
Author:  Fatzook [ Mon Apr 23, 2012 7:48 am ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
31zook wrote:
You could run a pipe down at 30°, put a 90° bend in it, and mount to the chassis with 4 bosses. I Use these at work. It's a bit of 20mm bar with a 12mm thread in it. Meaning you could use hex head bolts, counter sunk into the plate and no bolts on the other side. With a diagonal cross brace on these pipes it would be heaps string enough, and tight enough to go around your tyre. Does your rear axle move enough to touch the spare when flexing?



I'm pretty sure that for CCDA, Rear stays cannot be bent. And although I doubt it would be an issue, mounting a plate in shear on the side of the rail is probably not a great idea for such a crutial member of the cage.

i use threaded bosses for mounting number plates, removable panels, stauff clamps for hydraulic lines/ p/steer lines etc. I think welded crush tubes through the rail & fish plates would be a better solution if this were the chosen path.
Author:  tanshi [ Mon Apr 23, 2012 8:35 am ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
31zook wrote:
Does your rear axle move enough to touch the spare when flexing?


I havent had it up to full flex but im hoping not. It has WT diffs and -28 wheels on it so i would think the offset would be enough to clear.
Author:  tanshi [ Mon Apr 23, 2012 9:40 am ]
Post subject:  Re: Ute Roll Cages and mounting to the chassis
I thought about doing something similar to this
the red would be 6-8mm plate folded to fit over the chassis, the back stay would run down to the horizontal bit between the gussets.
green are verticle gussets.
blue are crushed tubed bolts through the chassis.
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