Rollbar / Solar arch - pipe dimensions

[tmk12]

Hi,

I plan to make a rollbar for Bavaria 38 Cruiser.
It is to be used for mounting solar panels and dinghy.

I have a problem with choosing the right pipe diameter.
The rollbar will be loaded with about 10kg of solar panels and other equipment + about 50-60kg of dinghy.

I'm wondering what tubes to use. I was thinking of 2" pipe, with a wall thickness of approx. 0.06 in. In metric 50mm/1,5mm.
All welded.

I would like the lightest construction possible, but of course, sufficiently durable.

Do you have any tips for pipes?

Thanks!
Tom