| 摘要 |
PROBLEM TO BE SOLVED: To provide a lower structure of an entrance effective for heightening the efficiency of field construction and fixture of uniform quality by integrally connecting a grating for drainage provided outdoors for the lower frame formed substantially flat with the top face part of the lower frame to the lower frame. SOLUTION: In an entrance structure, the sash for outdoors formed by upper and lower frames and right and left vertical frames, which is installed in an entrance of an opening part of a building for separating between the indoors and the outdoors, has the top face formed substantially flat, a water collecting recessed part is provided on the outdoor side of the lower frame, and the grating is disposed to block up the opening part. A plurality of grating connectors are fitted to the outdoor front part of the lower frame base in the longitudinal direction, the grating having the substantially flat top face, a front hanging part and a rear hanging part is fitted to the upper parts of the grating connectors, and the top face part of the lower frame and the top face of the grating are disposed substantially flat.
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