| 摘要 |
PROBLEM TO BE SOLVED: To provide an antifouling structure for an external wall, which can positively prevent a glass panel forming the external wall from being stained. SOLUTION: A transom 20 has a horizontal gutter 50 provided therefor. By virtue of this structure, dirty rainwater and the like falling along an aluminum panel 40 are received by the horizontal gutter 50 of the transom 20 arranged on an upper side of the glass panel 30 under the aluminum panel 40, and then positively drained from the horizontal gutter 50 via a draining portion 60 to a lower place. As a result, there is no fear that dirty rainwater reaches the glass panel 30, and therefore the glass panel 30 can be positively prevented from being stained.
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