| 摘要 |
<p>A plaster bead for an expansion joint between two adjacent areas of rendering (10) on a substrate (3). The bead is fixed to the substrate (3) and comprises a flexible U-section (6) the free ends of the arms of which are connected to rigid flanges (5). In use, the flanges (5) are substantially flush with the rendering (10). The flanges are connected to respective wings (8) of perforate material which are arranged to be embedded in, and keyed to, the rendering (10). A removable strip (11) is provided in the free ends of the arms of the U-section (6), and connected to the arms (11) by lines of weakness (12) along the edges of the strip (11). This strip (11) positively retains the free ends of the arms of the U-section (6) at the correct distance apart during fixing of the bead to the substrate. The strip (11) can be removed when the rendering (10) is dry leaving the arms of the U (6) correctly spaced apart. <IMAGE></p> |
