| 摘要 |
A building panel (13) of arcuate longitudinal form having a pair of upstanding flanges (19, 20) at its opposite longitudinal sides, a male rib (21) supported by one flange (19) and a female rib (22) supported by the other flange (20), both the male and female rib (21 and 22) extending wholly to one side of their supporting flanges (19, 20), the male rib (21) being engageable with a female rib (22) of an adjacent panel (13) to form an arcuate self supporting roof section for a building. |
