I agree w/ the 2x6's for rafters and at min. 2x8 for your ledge.
A hint about your tin....check around at the gauge and 2ft vs 3ft. You'll be surprised at the differences in price. You might be better off going to a lumberyard for your tin, but make sure they have enough to do your project.
There is a difference in manufacturin processes too!!
Some companies you might see are Diverisifed, Orange Steel, or McElroy. They are all reputable companies with decent products.
__________________
"I'm a comin back and I aint comin back ta play marbles!"- Yosemite Sam
|