T66
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| posted on 4/6/12 at 04:46 PM |
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Blue Book - Main Roll Hoop
Appealing to the greater experience of others on here, am I interpreting the msa blue book correctly regarding the main roll hoop specification.
My car was built post 2009 - Does the main hoop have to be 45mm x 2.5mm or 50mm x 2.0mm ?
Or are there exceptions which I am not aware of , if so what ?
Thanks
Minimum Material
Cold Drawn Seamless Unalloyed Carbon Steel,
containing a maximum of 0.3% of carbon.
Note: For an unalloyed carbon steel the maximum
content of additives is 1.7% for manganese and 0.6%
for other elements.
Minimum Yield Strength
350 N/mm2
Minimum Dimensions (Ø in mm)
a) Mandatory tubular members
45 x 2.5 or 50 x 2.0
38 x 2.5 or 40 x 2.0 (For roll cages/bars approved
prior to 1.1.95).
b) Optional tubular members
38 x 2.5 or 40 x 2.0
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mark chandler
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| posted on 4/6/12 at 08:22 PM |
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Yes, 45mm or 50mm
Only excections are where the cage has been approved my the MSA for cars, such as Caterham cages.
It does not make a lot of difference in cost as unless ypu are particularly gifted you will have to get someone to put the mandral bends in.
Regards Mark
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Mr Whippy
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| posted on 4/6/12 at 10:32 PM |
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although mine was for my landy, I'd recommend http://www.whitbread-offroad.co.uk/ for getting a rollbar made, he did a first class job of mine
and were very helpful and cheap
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