| 摘要 |
PROBLEM TO BE SOLVED: To provide a perforated beam reinforcing material capable of facilitating the conveyance, installation and storage and obtaining high shear strength. SOLUTION: On continued reinforcing bar is formed in a spiral shape around a void pipe 3 over the approximately overall length thereof, both ends of the reinforcing bar are formed in the shape of a ring by welding, or one continued reinforcing bar is formed in a spiral shape having an angle made by being bent to the center side of the void pipe 3 and to the direction of the opposite end around the void pipe 3 over the approximately overall length, and both ends of the reinforcing bar are fixed to one side of a polygon.
|
