| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure capable of supporting a floor surface constituting body without installing a floor joist and a supporting pad. SOLUTION: The floor structure 120 made of polystyrene foam is provided with a flat plate-shaped base 121 and a plurality of bandles 122 two- dimensionally installed in a standing manner in the base 121. Passages 123 are installed in a grid pattern around the bandles 122. The base 121 and the bandles 122 are integrally molded from polystyrene foam. On the passage 123, there are laid a gas pipe, a water service pipe and a pipe for a telephone line.
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