Where can one find tables with maximum spans for different dimensions of timber in roofs, 15°? Vacation home. I have a span of 5.2m. Roof pitch 15°. cc90, 45x170. Climate zone 3. What should it be? There is no attic and no trussed rafters, just these planks bear the entire snow load.
 
Yes, I also think it feels weak. That's why I'm asking. Kerto could be something. Masonite lightweight studs too. They also have span and dimensioning tables to download.

Are there such tables for regular timber as well?
 
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