| 摘要 |
PROBLEM TO BE SOLVED: To provide light and hard roofing with high weatherability and free from maintenance. SOLUTION: A plurality of hollow holes H are formed along an upstream side from a downstream side of an approximately square plate-like hard roofing A, at the same time, a cover piece 2a projected to the downstream side is formed in the end of the downstream side of a facing surface 1, a waterproof gutter 3b passing through up to the hollow holes H intersecting the hollow holes H is formed in the vicinity of the upstream side of the facing surface 1, and the hard roofing A is so formed that the length to the front end of the cover piece 2a from the end of the hollow holes H on the upstream side is larger than the width of the waterproof gutter 3b. COPYRIGHT: (C)2003,JPO
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