| 摘要 |
PROBLEM TO BE SOLVED: To provide a new technology capable of reducing field work by producing a backing member in a factory when forming a wing wall, and capable of easily coping with a change at a job site in response to its change when a construction process is changed at the job site.SOLUTION: In a wing wall backing body 21 for forming the wing wall between a column 12 and a mullion 19, projection parts 221 and 231 are formed on both ends in a longitudinal direction of upper-lower cross rails 22 23, and the wing wall backing body 21 is assembled by allowing tip surfaces 252, 254, 262 and 264 of a longitudinal directional end part of left-right muntins 25 and 26 to abut on a side surface of these projection parts. Since the projection part of the upper side cross rail is formed in a position dislocated from the center in a height direction, these are used by vertically reversing, so that one wing wall backing body can be made to cope with a wing wall height different between a case of constructing the wing wall on a floor material after stretching the floor material on a floor backing and a case of constructing the wing wall on the floor backing before stretching the floor material on the floor backing. |
