Hi - thank you for having a look at my post. I am considering building a "lean-to" off the end of our barn. I want the lean-to to be at least 10 feet high, and approx. 12 or 14 feet wide. The end wall of our barn which I would use as the main supporting wall for the lean-to is 8'6" high, with the wall being "real" 2x8s on 24 inch centres. The foundation is an engineered concrete slab. The upper wall (the mow side wall) is "real" 2x4s on 16 inch centres. I was planning on using 6x6s on 8 foot centres with lots of 2x10s as top joints to support the end of the lean-to roof. What I was wondering was: how high can I go up the 2x4s on the mow floor in order to achieve my minimum 10 foot high space inside the lean-to? The lean-to will be approx. 16 feet long. I was going to use 2x6s on 16 inch centres with 1" strapping for the lean-to steel roof. What considerations do you need to take when considering how strong the main wall of the lean-to needs to be? Thank you.