PARTITION WALL SOUND-INSULATION STRUCTURE AND SOUND-INSULATION MEMBER FOR PARTITION WALL

摘要

This partition wall sound-insulation structure comprises: a floor member in which a floor surface has been formed; a ceiling member in which has been formed a ceiling surface opposing the floor surface in the vertical direction such that a space inside a building is interposed therebetween; a partition wall that includes a pair of face members which partition the space in a horizontal direction and are disposed so as to extend in the vertical direction and sandwich a hollow section in the horizontal direction, and a stud which is disposed in the hollow section and is for supporting the pair of face members; a positioning member for positioning the stud in the horizontal direction; and a sound insulation surface member which is disposed on at least one surface from among the floor surface and the ceiling surface in the hollow section. The pair of face members are disposed such that gaps are formed in the vertical direction between the face members and the at least one surface. The sound insulation surface member is thicker than the gaps and is disposed so as to plug up the gaps from the hollow section side, and includes a portion having a greater surface density than that of the positioning member.