| 摘要 |
PROBLEM TO BE SOLVED: To provide a long roof board and a roofing method for a horizontally roofed roof using the roof board capable of connecting roof boards more strongly. SOLUTION: In the long roof board, one edge part of the long roof board 10 is folded back and doubled, a suspending part 14 having an inverted L-shaped cross section is formed by bending a tip of a doubled portion 12 transversely inward, an attaching piece part 16 having an L-shaped cross section is formed by extending a bottom edge of the doubled portion, and a part 20 to be contacted having an inverted L-shaped cross section is formed by folding up another edge part of the long roof board and bending a tip of a folded up portion 18 transversely outward. It is characterized by that one or a plurality of protruding parts 24 extending in a longitudinal direction of the long roof board and protruding downward is provided in the part to be contacted.
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