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Author: Subject: Side protection bars - what material type / size
Jenko

posted on 20/11/14 at 09:27 AM Reply With Quote
Side protection bars - what material type / size

My car currently has two roll over hoops. I would like to add a side support bar from the hoop down to the side of the car (going forward to just below the dash). The side bars will need to be bent by around 20 degrees. Qustion is, what spec of steel tube, and what size (dia, and wall thickness).

Thanks.





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loggyboy

posted on 20/11/14 at 09:59 AM Reply With Quote
Defo CDS. Same spec as recommended for rollcages. something around 35-40mm should look ok. 45 is standard cage size but quite thick for side bars, might look odd.





Mistral Motorsport

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CNHSS1

posted on 20/11/14 at 10:36 AM Reply With Quote
main sections of a cage need to be 45mm as per MSA but additional items can be 38mm and im 99% sure door bars can be 38mm.

if its like a Radical, where the bars from the main hoop goes forward you would need to double check the MSA Blue Book as I think these would constitute part of the main ROPS, but if youre never going to compete in the car, then it doesn't matter.

if the bars are to be bent though, they ought to be thicker than if a straight run imho, as any unsupported bend ie not triangulated, will be weaker in the event of a shunt





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Angel Acevedo

posted on 20/11/14 at 02:41 PM Reply With Quote
Anything would be better than nothing.
You just need to assess what level of protection you want.
If you make it invulnerable, all shock will be transmitted to the chassis and the chassis will fail.
By this time, the acceleration imparted to your body may be deadly.
Just mi humble oopinion.
AA

Edited to remove reference to atomic decay...

[Edited on 11/20/2014 by Angel Acevedo]





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