| 摘要 |
Depth of an inner batten (50C) is reduced and an indoor space (A) is covered with a cover member (60), so that, though the cover member (60) is attached to conceal a lower side of a transom (20C) from an indoor side in a vision portion, the cover member (60) can be omitted in a spandrel portion where the lower side of the transom (20C) cannot be seen in order to reduce production cost, and, even after the inner batten (50C) is attached to the transom (20C), cutoff treatment can be easily conducted before attaching the cover member (60), thereby obtaining stable cutoff performance by checking coating condition of a sealing material (90).
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