Roll Cage Design

[Green Leader]

This is fun.

Yes it is! I think this is very good cage match.

 

[Green Leader]

By what i've learned in this thread, the Jeep below could use some... "triangulation".. Right?

 

[SAMI]

As much as I dislike exo cages, i think this is one of the best ones i've seen...

Then he cut the exo portion off.. Looks awesome..

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[Green Leader]

I would have to agree that is pretty well built in my opinion. I am not a big fan of the exo either but that looks good.

 

[cruiseroutfit]

LOL I think by no means are we fighting here. I think it's more me against the wheeling community.

Ditto, I don't think we are fighting. I've agreed that in the ideal world all roll cages should be build to desert/drag/race sanctioning body standards, I just feel its not practical.

 

[heinie_21]

that yota is SO awesome! was that originally a 4-runner? I like the shock hoops above the hood! ahh heck i just like the whole thing.

 

[Gravy]

Jason: mossyrocks 4runner is sweet: I've been following that build since the beginning... very cool.

Kurt: thanks for your explanations, easy to tell you come from an Mechanical Engineering background.

Rockmonkey and Erik: Thanks for your real world fab and rolling experience, it definitely helps us less experienced.

Chad: I know you like stirring up crap... but relax a little. These guys have much much more knowledge than you (or I) about torsional loads, fluid dynamics and statics and strengths of materials.

The fact is that there are many many many talented fabricators and accredited engineers on this forum, and the fact that you have never built a cage or rolled in a production vehicle with an aftermarket cage doesn't really help your argument.

And believe it or not designing a cage that fits design requirements is not easy... that's why there are professional fabricators, and why places like Ben Hanks Racing, Cambell Enterprises, Twisted Customs, Blue Torch Fab, Bent Metal Industries, Mount Logan Offroad, SXOR, and countless other companies are in business...

because it is hard and they have knowledge, skill, and experience to back up their talk.

I think this thread would be more productive talking about good cage design rather than arguing whether prerunners or rock crawlers build better cages...


One design discussion idea that I have is:

How can we overcome the inherent weakness of a bent A pillar tube (like on a full bodied rig) and still make the vehicle functional (easy to enter and exit), but minimize unneeded tube?

 

[choptopbII]

Hey Chad, you can build a Cage for my truck any day!!

 

[UNSTUCK]

How can we overcome the inherent weakness of a bent A pillar tube (like on a full bodied rig) and still make the vehicle functional (easy to enter and exit), but minimize unneeded tube?[/B]

One of the easiest ways to add strength to the A pillar bend is to use a 1" tube for a grab handle/gusset. Doing it this way only works if your A pillar tube bends back so it runs to the rear of the rig, not if it goes across the top of the windshield to the passenger, or driver side. But you can still use a short tube or a gusset threir and not lose visibility.

 

[Erik d_lux]

One of the easiest ways to add strength to the A pillar bend is to use a 1" tube for a grab handle/gusset. Doing it this way only works if your A pillar tube bends back so it runs to the rear of the rig, not if it goes across the top of the windshield to the passenger, or driver side. But you can still use a short tube or a gusset threir and not lose visibility.

Rolling and having the cage crush you is one thing but I see FAR more danger in grab handles that are along the side of the rig. If youre holding on to a grab handle, slider, door etc,. I dont see your first reaction being to let go. Usually you will either hold on or try to put your arm/leg out to stop your roll.

I would rather see no roll cage than a cage with grab handles on the sides. I have never known anybody personally to die from rolling and having a cage failure. I have known a person to lose 2 fingers from flopping and landing on his fingers and two other times I have known a person to hang on to their door with their elbow hanging out and smash their arm causing serious pain for a long time. He is lucky he didnt lose his arm two times! This is why I drive with my left hand and hold the shifter at all times with my right hand.

 

[cheepin]

Adding some pics to this thread and looking for any suggestions.This is my start for my CJ-7/buggy thing.I am planning on Xing the roof as well as behind the front seats.Adding a couple more downbars angling front to back and tying b pillar to the c pillar.

 

[Mug]

Hope this helps.

 

[cheepin]

Thanks,Smart A$$.

 

[Mug]

I am at about the same point you are, cheepin. Here's what I have planned (some is already done).

 

[cheepin]

Something like that is what I am thinking.

 

[slcpunk74]

Jason: mossyrocks 4runner is sweet: I've been following that build since the beginning... very cool.

Kurt: thanks for your explanations, easy to tell you come from an Mechanical Engineering background.

Rockmonkey and Erik: Thanks for your real world fab and rolling experience, it definitely helps us less experienced.

Chad: I know you like stirring up crap... but relax a little. These guys have much much more knowledge than you (or I) about torsional loads, fluid dynamics and statics and strengths of materials.

The fact is that there are many many many talented fabricators and accredited engineers on this forum, and the fact that you have never built a cage or rolled in a production vehicle with an aftermarket cage doesn't really help your argument.

And believe it or not designing a cage that fits design requirements is not easy... that's why there are professional fabricators, and why places like Ben Hanks Racing, Cambell Enterprises, Twisted Customs, Blue Torch Fab, Bent Metal Industries, Mount Logan Offroad, SXOR, and countless other companies are in business...

because it is hard and they have knowledge, skill, and experience to back up their talk.

I think this thread would be more productive talking about good cage design rather than arguing whether prerunners or rock crawlers build better cages...


One design discussion idea that I have is:

How can we overcome the inherent weakness of a bent A pillar tube (like on a full bodied rig) and still make the vehicle functional (easy to enter and exit), but minimize unneeded tube?

No offense strat but really... I did not say I was the man to talk to about fabbing but really when it come down to it neither are you.

 

[slcpunk74]

By what i've learned in this thread, the Jeep below could use some... "triangulation".. Right?

And maybe some bigger tires lol.

BTW Sami that yota you posted is a great example and I hope some people take a good design like that and build on it for their rigs.

 

[slcpunk74]

Hope this helps.

Looks like a jeepspeed cage A little overkill but hey that just means you can have an excuse to drive faster ha ha.

 

[cheepin]

Where my cages fail...

The problem with trying to tie the dash bar to the frame is where to go with it.I have looked at mine and haven't figured a good way to route it without being in the way of the passengers.

Do the X's going side to side really help?

 

[slcpunk74]

The problem with trying to tie the dash bar to the frame is where to go with it.I have looked at mine and haven't figured a good way to route it without being in the way of the passengers.

Do the X's going side to side really help?

Are you talking about an x like just behind the seats(B pillar) or what? I would say it should be mandatory. If you take a hit from one of the top corners you are covered and if you take a hit from directly on top you are covered as well. I have always been fond of the x b pillar with the added tube running(verticle) from the middle to the roof. Kinda like a star.