| 摘要 |
PROBLEM TO BE SOLVED: To freely ventilate air in a ceiling of a tent structure having a large scale structure without adversely affecting the structure and without using heavy devices. SOLUTION: A main frame is a channel member having an about U-shaped section, and many openings are formed on its side wall, and fixed shaped openings 22 are provided on both the side parts of the long sheet rolled in the side wall of the main frame and fastened to it, while fastener seats 35, 36 having a fixed protrusive dimension are provided along the longitudinal end of the long fastener seat, the other longitudinal end of the fastener seat 35, 36 is provided with a zipper 45, and each fastener seat arranged on an adjacent long seat is allowed stride over the upper opening face of the main frame and can be closed with the zipper 45. In the case of altering the structure of the main frame, the main frame is composed of about U-shaped reinforcing member arranged and fixed to a beam member 24 at fixed spaces. A gutter member may be sometimes arranged below the zipper 24.
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