I'm in the early stages of planning out a shed. I have access to free 2"x3"x10' boards at work. I've been looking around and all i can find are posts about 2x3 vs 2x4 for framing. Most say that using 2x3 is not worth the small savings vs using the strength added by using 2x4. My question is could i double up the 2x3 and have a 4x6? Or even every other stud double it up. I do not plan on finishing the interior wall. The shed will not have electricity or plumbing of any kind. I was thinking The shed would be 10'x20' on a concrete pad. I will be buying treated lumber for any wood that touches the concrete. I haven't bought anything for this project yet fyi.