| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently construct a floor slab, wherein the floor slab includes a concrete body and the block having a specific gravity smaller than that of a concrete and arranged inside the body, by reducing labor needed to prevent floating of the block when the body is formed by placing concrete. <P>SOLUTION: This spacer is used for the floor slab which includes the body made of the concrete, the block arranged in the body and having the specific gravity smaller than that of the concrete, and at least one reinforcement arranged inside the body at an interval above the block and elongated in the horizontal direction. The spacer for maintaining the space between the block and the reinforcement comprises: a body which is composed of a pair of opposed sides provided at an interval and a top portion positioned between the sides, and which can receive the reinforcement; and at least one protrusion which is provided on each of the sides of the body and protruding downward from the side, and which can pierce through the block. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
