Hi David
This is from the
Cams Rule book;
A solo roll bar, the main hoop need to be made out of 44.45 x 2.5mm wall thickness or 50mm by 2mm wall thickness.
The material has to have a carbon content of 0.3% maximum Manganese content of 1.5% max other alloy content 0.5% for any element Max. Tensile strength 350 MPA minimum.
The Andra rule book;
1 5/8 by 2.9mm or 1 ¾ by 2.6mm Mild Steel for a main hoop.
Hope this helps?
