Show me your roll cage to suspension tower bracing, ..and other bracing/stiffening you've done Options

[GregAmy]

Just a quick follow up that I forgot to mention.

The purpose of allowing the Petty Bar and requiring seat-mount tabs, for a cage not using rear bars, is to keep the cage from "Z-ing" in the middle. This is where the top is held BACK by the upper front bars, and the middle is kept from bending FORWARD or SIDEWAYS (creating a "Z") and collapsing onto the driver. The Petty Bar is additonal lateral support so that it does not collapse sideways.

From a purely technical safety perspective, your bars in that same area as the seat harness mount do the same function. So it's not that I have a technical problem with the safety aspect, presuming you add a Petty Bar; it's just that it may not meet teh technical letter of the regs.

(I'm presuming you're also adding a diagonal and a horizontal with the plane of the mian hoop?)

Since the design does not meet the LETTER minimum of the regs, I'm not sure that field scrutineers would have the authority to approve it for SCCA. Could/might/maybe appeal to the home office for a waiver...? Clearly, I'm speaking for solely for SCCA regs (assuming someone wanted to go that way), not to the tarmac or any other orgs' requirements. - GA

[Beechhousegarage]

Thanks Greg!

I may have been a little stubborn about the plexi back window.
Have read through a couple more regulations and I understand what you are talking about.

My cage is tacked only, waiting to get full weld after we suss out all the details of fitment.

i broke tacks on the upper rear stay and repositioned it.

perhaps I should go this route and get a FIA cert from custom cages uk.

cheers
IG@beechhousegarage

[Beechhousegarage]

[GregAmy]

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