Steep Roof, Large Ring?

[BlossomMerz]

Hi, there!

I'm brand new to this forum, having sought it out as a place to learn as fast as I can. You see, I am taking the leap in a big way and building a platform and yurt this spring to serve as my weaving studio and residence.

I've read the books from Laurel Nest, Paul King, and others, so I've got a whole lot of construction ideas, but no practical experience.

For various reasons, which I'll explain if you like, I would like my roof to be very steep, about 45 degrees, and my roof ring to be large. (That one's easy to explain: lots of light.)

I'm thinking of standard 1x2 fir for the rafters and walls. 12' for the rafters and 10' for the walls with holes spaced 9" apart.

Here are my questions...

Is there any engineering reason not to make the roof so steep or the ring so large?

With 72 rafters, is a 12' 1x2 strong enough to hold up the roof, including a wool

insulation

layer and a fireproof rubberized "truck tarp"? If not, would a 2x2 work?

If I upgrade the rafters, will the walls be strong enough to hold it all up?

Thanks for any help y'all can give.




PS: The rendering was done in Google Sketchup. Don't let the slick appearance fool you. I spent years as a 3D software developer, but have no experience building yurts.