| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete slab with a stepped section, in which a beam type reinforcing structure is not required at the stepped section and which has a sufficient strength. SOLUTION: A truss bar 1b planted to a PC board 3b on the lower-stage side in two PC boards 3a and 3b arranged on different levels is extended up to the side end section of the PC board 3b on the lower-stage side approaching to the PC board 3a on the upper-stage side, and the beam type reinforcing structure need not be formed in the stepped section 5 of concrete 4 and the sufficient strength is obtained by reinforcing the stepped section 5 of concrete 4 formed on the side end section of the PC board 3b on the lower-stage side. COPYRIGHT: (C)2003,JPO
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