Step 2.4. The body frame
When the individual wall frames were made (the two side walls and the front wall) I stood them up and joined them together.
The two side wall frames fitted into the rebates in the front wall frame.
I held the wall frames together with clamps.
I fixed the frames together on the inside with 4 angle brackets at each corner.
The plywood sheet for the back wall was 11/16" (18mm) thick, 34¼" (856mm) wide, and 79" (1975mm) high.
The sides of the plywood sheet were set back from the corners 1" (25mm) plus the thickness of the 'corrugated' bit. (See drawing fig 2.4.1).
I glued and nailed the plywood sheet to the two side walls.
Time to fix the floor: I lay the unit down on its front, fixed the plywood floor to the underside of the studs with glue and screws (see drawing fig 2.4.2), and left the unit lying down in that position awaiting the next step.