Bryant RedHawk wrote:I.
My framed green houses are heavy but that is on purpose, I use 2x6's, 4x4's and the ridge is usually two 2x6's glued and screwed together for stiffness. If I want a half wall to mount benches to, I use 2x4's for framing that as well as for the bench.
I try hard to not need treated lumber so what I did was get some 6 inch PVC pipe and fittings, I glued these to get the right length and then put on screw cap ends.
I use this to soak the wood that will touch the soil in a borax solution for a few days then pull the wood out and let it air dry off the ground.