| 摘要 |
A lower support is provided between the side edges of the roof beneath. The lower support is in contact with the roof adjacent to the exterior edge. Upper supports are provided above and in contact with the roof. The upper supports include upper exterior, interior and intermediate supports. The upper exterior support is adjacent to the exterior edge. The upper interior support is adjacent to the interior edge. Central supports extend between the interior and exterior edges of the roof. The lower support is provided below and the upper supports are provided above. The central supports are located above and in contact with the roof. In this manner lower intersections are formed with the upper exterior and lower exterior and central supports. Upper intersections are formed with the upper interior and the central supports. Central intersections are formed with the upper intermediate and central supports.
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