CEILING BACKING WOODEN FRAME STRUCTURE

PURPOSE:To facilitate the jointing work of a ceiling joist, a ceiling joist receiver, and the like, enable ceiling joist construction without positioning the ceiling joist in a conventional way, allow layout positions to be selected by sliding so as to reduce mandays, and eliminate the necessity of nailing work so as to enable work without needing skilled technique. CONSTITUTION:At the time of forming a ceiling backing wooden framework of a ceiling joist receiver 2 and ceiling joists 3 formed of wooden framework of rectangular cross section with groove parts 31 formed at the respective relative faces of the long sides, and ceiling joist hangers 4, the upper end locking parts of the ceiling joist hangers 4 having opposed suspended locking parts as well as the upper end locking parts are locked to the wooden framework groove part of the ceiling joist receiver 2, and the opposed suspended locking parts are fitted into the groove part of the ceiling joist wooden shaft.