| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a void slab allowing reliably forming a hollow part and using the hollow part as an air circulating channel.SOLUTION: A void slab 1 includes: a plurality of beams 10 which are arranged in a predetermined direction; lower slabs 11 for connecting the lower ends of the plurality of beams 10 each other; and upper slabs 12 for connecting the upper ends of the plurality of beams 10 each other. A steel cylindrical spiral duct 21 is accommodated in a hollow part 20 surrounded by the plurality of beams 10, the lower slabs 11 and the upper slabs 12. The hollow part 20 is provided with: a pair of wall forms 31 which are made of extruded polystyrene foam and cover the side face of the beams 10; and rungs 32 which are made of extruded polystyrene foam and connect the pair of wall forms 31 at predetermined intervals. The rungs 32 are provided with a cutout part 34 at least in part, and an air conditioning duct 35 is formed through the cutout part 34.</p> |
