Here is a photo of the almost complete prototype.
The building is 8′ x 15′. It has an 8′ ceiling. There are three large windows in front and two smaller windows in back. The exterior can be painted or left natural.
The interior walls are pre-finished. For the prototype I used 1/8″ mahogany type plywood that came as packaging for sheet metal. It actually doesn’t look too bad. The metal strips are the clips used to assemble the building.
The building was easy to assemble. I first built the floor the same size as the exterior dimensions of the building.
Next, the bottom sill was attached to the floor. The bottom sill adds horizontal strength to the walls, attaches the walls to the floor, and diverts any water that gets between the panels to the outside of the building. The corners were caulked to make them watertight.
Starting at one corner, the wall panels are placed on the bottom sill and a ‘c’ clip is slid over the flanges of adjacent panels, connecting them together. A sheet metal screw on each side of the inside of the panels attaches the wall panel to the bottom sill. Half panels or quarter panel are used where there will be windows.
Continue placing wall panels until the walls are complete, bracing where necessary. Once the wall are complete, ‘Z’ flashing is screwed to the top of the walls.
The roof beams are placed on the ‘Z’ flashing, bolted together, and screwed to the ‘Z’ flashing. The front roof beam is 2″ x 2″ and the rear roof beam is 2″ x 6″ to give the roof a slight pitch. There will be a small porch in front of the door and the roof will extend over it.
Next, the roof panels are placed on the roof and screwed to the roof beams using an angle bracket between adjacent panels. The adjacent panels are then clipped together with a ‘C’ clip. The ‘C’ clip makes an extremely rigid joint and seals the joint from the top so water cannot penetrate.
The ceiling is exposed galvanized metal with seams every 16″. It could be painted or covered with acoustic tiles or some such thing. I like the natural galvanized metal.
Once the windows and doors are installed, the building is complete. If one wants to run electrical wiring in the walls, the interior wall panels are removable and there are pre-punched holes at the top and bottom of the panels for wiring. Interior walls can be built and plumbing added if required.