| 摘要 |
<p>The roof gutter angle piece is made of metal or non-metallic sheeting, less than 1 mm thick, with angle shanks arched downward in a trough shape. Zinc or copper, 0.5-0.8 mm thick, are suitable materials. It is produced from one piece, by deep drawing, and has a walling section, facing the roof edge or facing away from it, curved in an arc shape where the sections converge at an angle. The walling section (7) with the curve (4) may be rolled over into a seam (8) on the side facing away from the roof; or the angled walling piece facing away from the roof edge may be rolled over in this way. This improves connection and reduces likelihood of deformation, while rainwater does not have to pass over a sharp corner, leading to dirt collection.</p> |
