FLOOR STRUCTURE WITH DUCT AND ITS CONSTRUCTION

摘要

PURPOSE:To shorten the period of construction as well as reduce the cost of construction by a method in which a duct device is easily and exactly set on a given level without the needs for two-times' placement of concrete on the support plate such as formwork composite panels. CONSTITUTION:A duct body 8 permitting the side wall 11 to expand upwards is supported at a given level on a support plate 2, and concrete is placed to almost the same level as the upper end of the duct body 8 onto the plate 2. The side wall 11 of the duct body 8 is upwardly extended for correcting the error of the level by the deflection of the support plate 2. The upside of the concrete so placed is finished to almost the same level as the upper end of the duct body 8.