| 摘要 |
PROBLEM TO BE SOLVED: To provide the structurally simple flashing structure of a band-window mullion in which stable watertightness is displayed for a prolonged term. SOLUTION: The flashing structure of the band-window mullion has a primary watertight means attaining primary watertightness in the case of drawing to the indoor side, interposing primary tight materials 53L, 53R among the outdoor surfaces of vertical frames 1, 2 and the internal surfaces of the outdoor projecting sections 13L, 13R of the mullion 10 and a secondary watertight means attaining secondary watertightness by the elastic abutting of secondary tight materials 14L, 14R, interposing the secondary tight materials among the vertical frame 1, 2 and the wall surface of the mullion on the room side inner than the primary watertight means. Cutoff spaces S1, S2 are formed between the primary watertight means and the secondary watertight means, and the lower ends of the cutoff spaces S1, S2 are communicated with the outdoor side.
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