i should not think that would be a problem.

Cool didnt realize Rs did them, ive looked everywhere for closed ally rivets

On another note if I was using 2mm ally chequer plate on 2mm box section would 3.2mm to 4.8mm grip range be ok or would you go for 6.4mm to 7.9mm?

Cheers Will

personally i'm going for double the thickness plus about 1mm more to allow for the sealant.

rivets
 

hi there i used steel 4.8mmx12mm or (3/16x1/2 in old money) i used sealed rivets with adhesive sealent to prevent the electrolitic action of the ally and steel at 50mm pitch