| 摘要 |
It is an object of the present invention to enhance the efficiency of a concrete form construction work. A form panel 1 to be used includes a plurality of expandable parts 3, wherein the expandable parts 3 include a plurality of projectedly bent rows 10 bent so as to be protruded toward a concrete depositing surface side and a plurality of recessedly bent rows 11 which are bent so as to be recessed toward the concrete depositing surface, the projectedly bent rows 10 and the recessedly bent rows 11 are in parallel to each other, each of the projectedly bent rows 10 and the recessedly bent rows 11 is provided with a plurality of longitudinal slits 7 at appropriate intervals from one another in a straight line.
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