Floor Plate on Car-Tyre-Foundation
Straw bale insulated floor-plate as ceiling to (cold) cellar or on stripe-foundation (concrete) with outside insulation, construction similar to outside wall. Beams (posts in wall): Two 14 x 6 cm structural timber connected with metal lash or wood (OSB or wooden boards).
Materials Nr. 61: As the outside surface has to have a lower Sd-value (4:1), use diffusion-open DHF-roof-boards or diffusion-open OSB on the lower surface.
Detail is suitable for Low Energy or Passive Houses (depending on A/V-ratio and stories).