FLOOR-CEILING STRUCTURE

摘要

A floor-ceiling structure between an upper story floor board and a lower story ceiling board, comprising a plurality of floor joists disposed in a specific direction in the state of being arranged roughly parallel with each other, side joists disposed at positions for holding the floor joists in the specific direction in the state of being arranged parallel with these floor joists, end joists which are disposed at positions for holding the floor joists in a direction crossing perpendicularly to the specific direction and to which the end parts of the side joists and the floor joists are fixed, and a ceiling beam for suspending the ceiling board disposed across the end joists so as to be roughly parallel with the side joists. At least one joist among a joist group formed of the side joists and the plurality of floor joists is supported by the wall of the upper story or the lower story, and the ceiling beam is installed only near the wall.