| 摘要 |
The collar connecting a building structure penetrating the roof with the sub- roofing structure of the roof is made of any flexible, water resistant material and has the shape of a frame surrounding the structure set on the roof. The collar has an internal edge with constant length, adjusted to the building structure in question, which enables connecting the collar to the external perimeter of the building structure. The collar consists of elements, preferably joined together to constitute a closed perimeter, with the elements which are laid askew against the battens constitute strips of a curved surface, preferably a ruled surface, which are limited at the inner side of the collar by straight edge, and at the ex ternal side by a space curve. The collar, upon connecting it by its inner edge with the external perimeter of the building structure set on the roof, spreads freely on the external surface of the sub-roofing structure of the roof, grasping the protruding roof battens and adhering, between the battens, to the surface of the external diaphragm. |
