nudge120

iTrader: (2)

Here is a link to my cage build and current safety setup. Let me know your thoughts from a safety standpoint.

http://www.thefabricatorseries.com/b...tack-roll-cage

nemsin

iTrader: (19)

Looks good. What kind of steel did you use? Here is a top shelf cage for the 6 that you might be able to find some insights from http://www.customcages.co.uk/Rollcag...pe=2014%20Spec

LetsGetThisDone

iTrader: (1)

Only thing I don't like is that door bar. It should have been built with no bends. Would have been easy to do by using 3 tubes instead of two.


Also, all the tubes should meet/land on those boxes on the floor. Where as now one tube lands on the box, and all the other tubes land on the tube an inch above the box. I also would have mounted the seat to the cage, not to the floor pan, that way they are attached to the safety cell, and will stay with the safety cell. It's not likely to be a problem. Just a pointer for future work.

nudge120

iTrader: (2)

The door bars I wanted bowed out as much as possible, though its not much(due to no notching of the b-pillar allowed) and is not visible in the pic. They do protrude slightly which should be a stronger design for side impacts than the straight across design. Also starting higher on the top door bar allowed it to protrude more and gave more elbow room.

I do agree on the seat mount though I wouldn't want the be effected by the floorpan shifting separate to the cage in an accident.

Thanks for the pointers they are very much welcome.

DOM 1.5 x .095

LetsGetThisDone

iTrader: (1)

My design change has nothing to do with position. Its more to do with those very compromising bends in the middle of the door bar. Those bends create a weak point that I wouldn't want in my door bar. The lines I drew represent 3 tubes, and how you could replace what's there to be exactly the same, except much stronger.

nudge120

iTrader: (2)

I like the idea of the outward bent door bars being loaded in compression of a side impact, and feeding the force into the cage. As opposed to the straight bars, which would be better in a front impact. I have seen pics of the straight X design fail in a side impact, which is why I insisted on that design and the extra room is nice.

LetsGetThisDone

iTrader: (1)

You can still bend the tubes outwards. But having those bends the way they are now vs building the X how I show, and slightly bending the "yellow" tub outwards really compromises the strength they give to the a pillar. You also don't have an A2, a tube from the bend where the a pillar meets the roof, to the floor. You can see it in the cage Nemsin posted. This should be seriously considered to keep the roof from collapsing if you hit the corner of the roof/a-pillar hard, which is a common impact point in rollovers.

nudge120

iTrader: (2)

That A2 support bar is something I really wanted for this cage. My builder was not comfortable putting it in when I was requesting because of how far forward I needed the seat to be(my being short and all). He felt would inhibite egress too much in an emergency situation, so I had to do without.

LetsGetThisDone

iTrader: (1)

The roof being shoved down 6" because you stuffed the corner of it into the ground will hamper egress a lot more than an A2..

nudge120

iTrader: (2)

It seems to be the catch 22 as to what is more likely to happen. Fire and not being able to get out in a panic or a rollover with hard roof impact. I went with the builders recommendation, easier livability also, btt I will reconsider and see how much longer and more difficult having a bar there will make getting out of the car.