| 摘要 |
PROBLEM TO BE SOLVED: To enable roof members to be suspended with a simple method. SOLUTION: Roof members 4 are layed between a plurality of columns 3, a support column 7 is erected on a top surface of the roof member 4 at which the column 3 is positioned, via a jack 8, and the support column 7 is pushed upward by the jack 8, while the roof member 4 are suspended by members 5 extending from an upper part of the support column 7.
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