What gauge roof metal/roof ribs?
My first choice to bolt a solar roof rack thru the outer metal skin into my roof ribs using rivnuts.
- How thick is the roof metal? I'm thinking that it is about 16 ga.
- How thick is the metal on my roof rib? Does 11 ga. sound about right?
From what I can see it will require 1/2" rivnuts due to the thickness that is there.
My second choice is to drill thru the skin and use a piece of angle iron on the inside to distribute the load across the thin metal skin. Probably easier, but going thru the ribs looks to be stronger. Also, the second choice may lead to distortion of the metal skin due to flexing.