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Just incase you don't know: Seam welding means 1" (or less) on (weld) and an 1" (or more) off. Does not mean continuous welds.

If you make the car too strong/brittle the person inside breaks, so please think about crumple zones as well and don't over do the welding.

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Pete
 

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Various "experts" i spoke to, seem to think the roll cage should extend to the shock mounts to improve the cars handling
Yes totally agree, as then the roll cage becomes part of the chassis ... heck you have to carry the weight of it around, it might as well do something as well :) (not just insurance for that hopefully never happening accident).

Also mount your seat on the cage ... so if you get hit in the side your seat will move with the roll cage.

Pete
 

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As you can see I have a low bar from left to richt just behind the seat What you want is a cage that wil not move (much) with a side -impact. I don`t agree with Psk on that point.
Mounting the seat on the rollcage is now a requirement to race a car in levels of motorsport in Australia that require a rollcage.

Why?

When a car gets hit in the side you want to move with your rollcage, because yes it will move. We had a driver die because of this a few years ago ... basically crushed by his rollcage.

Just think of having a spin, maybe hitting a wall and ending up back sideways on the track ... the next car hits yours and is doing like 100+mph ... your cage WILL move!!!
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Pete
 

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:confused:

Can you point that requirement out for me? Maybe I am misunderstanding what you are saying, but I can't seem to locate that regulation in the CAMS manual.

http://www.camsmanual.com.au/pdf/general/0611_Schedule_J_Q408.pdf
Also confused, as neither can I. But I do remember when that guy died at Bathurst around 10 years ago that the recommendation afterwards was that seats must be mounted to rollcages.

This Australian roll cage manufacturer site refers to seat mounts: REDLINE SPEEDWAY KIT ROLLCAGES

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Pete
 

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The accident that caused the change in Australia ... :-(

http://www.ten-tenths.com/forum/archive/index.php/t-37435.html said:
Greg was indeed a great guy with an in check ego it is often rare for famous motorsportsmen.
Greg,s death was probably the hardest thing I had faced in 25 years of motorsport.
He was killed in the lead car of a 2 car team owned by Ross Palmer Motorsport[RPM] the other car being driven by my son Darren.
He was also my close friend and to have an incident like this happen in your teams first outing certainly makes you think long and hard.
Primarily a HANS device would have helped,however he also sustained seriousinternal injuries from the failure of the side intrusion protection.
In memory of Gregg and for the good of the sport I started on a 7 year campaign for the introduction of HANS systems in Australia.
Unfortunately their final adoption by motorsport regulators came too late for 23 year old Stewart Mc.Coll [VW Works Golf R32]who lost his life at the Same Track in a round of the Australian GTP series this year.
HANS systems were finally approved 1 week before his death.
For all racers and team owners the eventual compulsory adoption of head and neck systems will go a long way to making our sport a lot safer.
RIP Greg and Stewie.
Was not at Bathurst as I first thought.
Pete
 
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