| 摘要 |
<p>The roof external anchor is made of customary flat iron treated to be weather-resistant, with a thickness of at least 4 mm, a width of at least 30 mm and a length extending over the complete length of the roof. The anchor body (1) runs from one ridge wall (9) to the opposite ridge wall (9) and centrally in a roof tile row. For fixture there are drill holes in the anchor body, which are individual for each roof. Between the screw head of each screw used (3,6,7) and the anchor body a steel washer is placed. The anchor body is firmly screwed into the ridge walls. The ridge anchor screw (3) penetrates through the previously through-bored roof tile (10) which rests on the ridge wall (9) and is fed into a heavy duty dowel (5).</p> |
