| 摘要 |
A conjoint facia, hood and water dam is provided having dam and first engagable means affording dam means and first engagable means. Ridge structure of the dam means, against which ridge structure sheet roofing rests, is covered by hood structure of at least one facia and hood member, with there being second engagable means of the conjoint facia, hood and water dam available as an extension of the facia and hood member. The first and second engagable means together form tongue means and grooved means for these means to be engaged and the first engagable means includes detaining means for upward movement of the facia and hood member relatively to the dam and first engagable means to be stopped. The tongue means and the grooved means are aligned to be engaged after downwardly moving the facia and hood member relatively to the dam and first engagable means against bias of biasing means disposed inside the hood structure of the facia and hood member between the hood structure and the sheet roofing on the ridge structure of the dam means, meanwhile having the hood structure cover the ridge structure. The tongue means and the grooved means are engaged by then upwardly moving the facia and hood member relatively to the dam and first engagable means by reactive thrust of the biasing means, having the tongue means and the grooved means relatively move engaged until the upward movement of the facia and hood member relatively to the dam and first engagable means is stopped by the detaining means, thereafter to have the tongue means and the grooved means still engaged, the facia and hood member still covering the ridge structure, and the biasing means still pressing the sheet roofing against the ridge structure and reactively biasing the facia and hood member to move upwardly.
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