FLOOR BASE STRUCTURE FOR SUPPORT PILLAR RECEIVER

To provide a floor base structure for supporting a support pillar that can firmly attach a pillar support member to an edge of a floor section brought out toward the atrium space against a transverse frame without incurring high costs.SOLUTION: This floor base structure for supporting a support pillar comprises: a floor support member 31 fixed to a transverse frame 3 and brought out toward an atrium space 200; a support member 4 located below each pillar support section 2 and fixed to the floor support member 31; an ALC floor slab 6, which is a floor base plate provided on a non-atrium side from the transverse frame 3 and fixed to the transverse frame 3; an intermediate floor base section 61 provided between the support member 4 and the ALC floor slab 6; and a floor base plate member 11 that extends from on the support member 4 over the intermediate floor base section 61 to on the edge of the ALC floor slab 6, and is screwed to the support member 4 and the ALC floor slab 6. And the pillar support member 2 is fixed to the support member 4 by a screw 401 that passes through the floor base plate member 11.SELECTED DRAWING: Figure 2 【課題】横架躯体に対して吹き抜け空間側に持ち出された持出床部の縁に、支柱受け材を、高コスト化を招くことなく強固に留め付けることができる支柱受け床下地構を提供する。【解決手段】この支柱受け床下地構造は、横架躯体３に固定されて吹き抜け空間２００側に持ち出された床受け材３１と、各支柱受け部２の下方に位置し、床受け材３１に固定された支持部材４と、横架躯体３上から非吹き抜け側に設けられており、当該横架躯体３に固定された下地床版であるＡＬＣ床版６と、支持部材４とＡＬＣ床版６との間に設けられた中間下地床部６１と、支持部材４上から中間下地床部６１上を横切ってＡＬＣ床版６の縁上に至り、支持部材４およびＡＬＣ床版６にねじ固定された床下地面材１１と、を備えており、支柱受け材２が床下地面材１１を貫通するねじ４０１によって支持部材４に固定されている。【選択図】図２