| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-floor which disperses a load to increase the load-carrying capacity and further, eliminates a gap between joints. SOLUTION: A floor panel body provided with a connection part such as a recess 2 and a tongue 3 at the four peripheries of a rectangular base plate 1 and also provided with support legs 5 for installing the lower end on the floor slab 4 is arranged on the floor slab 4 to form the double-floor. In this case, at least the last floor panel body in a plurality of floor panel bodies A arranged in odd-numbered rows forms one of divided floor panel bodies Aa, Ab that the base plate 1 is divided into two and at least the first floor panel body in a plurality of floor panel bodies A arranged in even-numbered rows forms the other of the last divided floor panel bodies Aa, Ab of the front row to shift the joint position in the row direction between the floor panel bodies A to the direction, in the adjacent rows.
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