Fire rating EL30 exterior wall?

[calvin82]

The gable of our planned guesthouse will be 3m from a barn and therefore needs el30 classification.

Here's what I'm thinking:
Cladding panel 22mm
Exterior gypsum board 12mm
Stone wool 120mm
OSB 10mm
Inner panel 14mm

Is that enough (or maybe even less would suffice?!)

I'm also considering the structural strength (a bit harder to research). Conditions: Ridge roof, laminated timber post 90x90 in the gable. Does it need to be specially protected according to regulations?

 

[Rickard.]

You will definitely meet ei30 even without the gypsum if that's what you were wondering about.

 

[calvin82]

Yes, that's what I was thinking. I was preferably considering using a duk instead.