Hello all, Havent been here for a few years but am looking to put a lean-to against my metal carport for my tractor. Am making it 8' or 9' wide and 24' long (the length of my carport). I plan on 2x6s for the plates holding up the rafters bolted to 4' OC metal wall frame at the carport and at the other end 2x8s setting on 4x4s six feet apart. So my questions are how far apart for the 2X6 rafters and then 1x4 or 2x4 perlins and I am assuming they need to be every 2' and then am I ok with the sizes used for the rest of the framing? Oh, I am in nortern Pa where we do get some snow (or used to) and I am looking for a pretty mild pitch, like maybe a 3/12 as I dont have too much height to begin with as I want to keep it under my carport's overhang, which is 8 feet. I'm open to putting the roof on top of the carport roof (metal) for more height (and 10' rafters), and this would actually be my preference, but am unsure of the process to ensure a good water tight seal. I thank you all in advance for any thoughts on these questions.