| 摘要 |
<p>The shanks of a steel frame run along opposite edges of a form panel, in the formwork for the erection of concrete walls. One shank, at least, has holes for tension bars passing through the wall, secured by a nut. The size of holes (11) provides room for the whole cross-section of the bar (12). On the side (17) of the shank (6) away from the wall, the part (14) of the hole edge adjoining the panel edge is higher than the section of the hole edge furthest from this. The nut (21) has a spherical shape on the underside facing the form surface.</p> |
