WINDOW FRAME SASH ATTACHMENT STRUCTURE

PROBLEM TO BE SOLVED: To provide a window frame sash attachment structure capable of preventing deformation and damage of a window frame sash and a panel around an opening section even when an earthquake occurs.SOLUTION: At an opening section formed by ALC wall panels adjacently arranged in a horizontal and a vertical directions, backup members 11 are installed at an exterior side of spaces S between a lower end face 2a of an upper panel 2 of the opening and an upper frame 8a of a window frame sash as well as between an upper end face 3a of a lower panel 3 of the opening and a lower frame 8b of the window frame sash. In addition, mortar 10 is placed only at an interior side of the backup members 11 installed in the spaces between a panel attachment angle 5a of the upper panel 2 of the opening and the upper frame 8a of the window frame sash as well as between the panel attachment angle 5b of the lower panel 3 of the opening and the lower frame 8b of the window frame sash.