| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure which dispenses with protection against external factors, secures wide effective space in a building, controls long-term deflection of a floor, and ensures a high-quality space. SOLUTION: According to the floor structure, a prestressing steel 2 extending like a catenary curve, is arranged in a floor slab 1, and the prestressing steel 2 has tensioning force introduced thereto, to thereby apply prestress to the floor slab 1. Herein the prestressing steel 2 is inserted into a void space V1 secured in the floor slab 1, and jack mechanisms 6, 6 for moving part of the prestressing steel 2 in the vertical direction are set in the floor slab 1. COPYRIGHT: (C)2007,JPO&INPIT
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