I've been working on a factory for my layout. It's going to be fairly large, but not the largest one planned. Approximate 31X15X18 high. All made from 1 sheet of 1/2 inch MDF and 1/8 inch tempered hardboard. The MDF was ripped on my table saw to 1/2 inch square pieces then cut to length. They were all marked for their position a day then 1/2 inch dadoes were cut to form half laps for each piece. all the pieces were glued and assembled and attached to a 1/4 inch hardboard base. The interior was give a rattle can coating of red oxide paint. Then the 1/8 inch hardboard sheets went on to give the building some strength.
The work isn't finished. I still need to cut the sides to roof height and build windows. Lastly will come the roof. I also will be adding a skin of corrugated metal on top of the hardboard. Adjacent to it will be my electric arc furnace building. That one will be 48x24X22 high, possibly with an open front so I can detail the interior.
Stay tuned for more.