u/khazmor

I'm planning to build 14'x16' shed that I'll use for my woodworking hobby. Currently I am pretty settled on single sloped roof with 2/12 pitch. I plan to use metal roof and rockwool insulation.

What rafter size should I choose? I thought about 2x10, but it came up really expensive (30% of overall framing cost) and now I'm not sure