| 摘要 |
In a metal roofing system in which a plurality of overlapping horizontal courses of metal shingles are secured to a roofing substructure, each course being formed from a horizontal row of metal shingles that overlap and interlock with other metal shingles in a course disposed directly therebelow, and wherein a joint pan is positioned below abutting metal shingles within each course, the improvement comprising: a deformation at a top of each joint pan, the deformation indicating proper placement for a short edge of a metal shingle.
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