| 摘要 |
PROBLEM TO BE SOLVED: To provide a curtain wall good in watertightness and easily suppressing dew condensation that occurs in a hollow layer of a spandrel section.SOLUTION: The curtain wall includes openings 10 and spandrel sections 20. The spandrel section is formed with the hollow layer S surrounded by a frame body, a glass panel and a back panel, and at least part in the frame body is formed with an isobaric space T2 surrounded by a rain barrier, a wind barrier and pieces of the frame body and having pressure equal to outside air. The frame body is provided with a plurality of holes 31h, 31j, 32h, 32j serving for communication between the hollow layer and one of isobaric spaces provided inside the frame body. The holes are determined in the opening areas by a relationship including the clearance area between the back panel and the indoor side and a water drop scattering limit differential pressure. The isobaric space is thereby extended to the hollow layer, and at least one of the plurality of holes is disposed at a higher position than the other holes. |
