The walls are 2x4 framing, 5' in height. Two of the walls are 6' in width, while the other two are only 5'5" in width. This size difference allows the 4 wall frames to be bolted together securely. The purpose of this modular approach was to allow the building to be dis-assembled and moved easily at any time in the future.

I built MGRO in the driveway in front of my house, and when it was mostly finished, I dis-assembled it and moved it to its current location in the back yard. Except for the roof, this dis-assembly/move can be handled by one person! If I was a better fabricator, I would have built a modular roof too, and then it would truly be a one-man operation to dis-assemble and move the building.