I’ve got the steel frame put together and anchored down. Studs are about 16 inches on center, although I got a little creative with the front, since I couldn’t run track across the opening.
I initially built the frame with a 0.25/12 pitch, planning for a flat roof covered with ceramic floor-tiles. I later decided to just use some leftover metal roofing. This called for a steeper pitch, to keep water from pooling or running back under the overlapping pieces. So, I cut a 2×4 on the slant and screwed it to the frame from below.
The walls will be stucco. I’m debating whether to use a backerboard, or expanded metal lath. Does it matter?