| 摘要 |
PROBLEM TO BE SOLVED: To provide double floor supporting legs coping with the demands such as the fire-protection and the incombustibility while keeping the easiness in the execution of works of a double floor. SOLUTION: Connecting members 2, supporting legs 1 and a floor panel are mainly composed of a material having incombustibility, the connecting members 2 have the linear or strip shape and can not be longitudinally expanded and contracted, and each end part of the connecting member 2 is unremovably buried in the supporting leg 1.
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