| 摘要 |
A sheet metal roofing system 10 comprising pan 11, bracket 21 and batten 31 sections is disclosed. The system covers a given surface 60 with a minimum amount of material while providing two mated surfaces 12 and 13 for sealing the sections together. The absence of fasteners from the exposed surfaces allows them to expand and contract in response to changing temperatures. The pans have rolled edges 15 to provide increased strength and a better fit with the brackets 21.
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