FLOOR STRUCTURE

PURPOSE:To improve the extent of floor impact noise interrupting performance by forming an outer frame with four floor large beams, anchoring two floor small beams, parallelly set up with each other, to the floor large beams, and locking a floor plate to the top of each small beam. CONSTITUTION:An outer frame is formed with four floor large beams, while two floor small beams 24, parallelly set up with each other, are anchored to the floor large beams, and a floor plate 25 is locked to the top, forming a floor structure 21. Then, a connecting member 31 connecting these floor small beams 24 is attached to the opposite side of the floor small beams 24 where this floor structure 21 adjoins, while a ceiling hanger 32 is parallelly set up. Next, this ceiling hanger 32 is locked to the opposite floor large beam and the connecting member 31, and a lower floor ceiling board 42 is slung from this ceiling hanger 32. With this constitution, the extent of light and heavyweight impact noise interrupting performance is thus improbable.