PC CONCRETE FLOOR BOARD HAVING HOLLOW HOLE AND MANUFACTURING METHOD THEREFOR AND CONSTRUCTION METHOD FOR COMPOSITE CONCRETE FLOOR USING PC CONCRETE FLOOR BOARD HAVING HOLLOW HOLE

摘要

PROBLEM TO BE SOLVED: To easily hang a concrete floor board having a hollow hole when the concrete floor board is constructed and make freshly mixed concrete to flow into an end part of the floor board easily when freshly mixed concrete is placed after hoisting the concrete floor board to solidify the connection of the completed floor board and freshly mixed concrete.;SOLUTION: A scraped-off part 13 in which a ridge part on upper sides in both end parts of the PC concrete floor board 10 having the hollow hole is scraped off until it reaches the hollow hole 11 is formed. A dimension in the direction of length of the floor board 10 in the scraped-off part 13 is equivalent to its thickness or 1/5 of the thickness.;COPYRIGHT: (C)2002,JPO