| 摘要 |
The roof section comprises a quadrilateral substrate and a roof covering on the top thereof. The covering comprises shingle-like roof plates, the bodies of which have a tapering cross section in one cross sectional plane thereof. The plates are arranged in at least two elongated parallel, relatively transversely offset but overlapping relatively top and bottom series. Each series has a plurality of the plates, and the plates are arranged in each series so that the bodies of the plates are staggered in overlapping relationship to one another lengthwise of the series. Also, the tapering cross sections of the plates are disposed lengthwise of the series. The series are arranged between unidirectional edges of the substrate so that a relatively top series forms a projecting lip along one of the edges and a relatively bottom series forms a complimentary shoulder along the other edge, to enable a plurality of the sections to be abutted edge to edge of one another in coplanar array, with a waterproof lap joint thus formed between them.
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