| 摘要 |
PROBLEM TO BE SOLVED: To enable conversion to production of a plurality of kinds of PC step forms whose dimensions are different from each other. SOLUTION: An outer form plate 11 consists of vertical tread top surface forming part 111 and a riser outer side surface forming part 112. An inner form plate 12 consists of a tread lower surface-forming part 121 which faces the tread top surface forming part 111 and riser inside surface forming part 122 which is extended integrally from the lower end and faces the riser outside surface forming part 112. A sliding plate 13 for tread-forming is fixed onto the tread-lower surface forming part of the inner form plate 12 so as to permit position adjustment with a slot 13a through a bolt 123 and a fly nut 126. It is thus possible to increase or decrease a forming space for placing concrete C freely. |
