| 摘要 |
<p>A concrete screed rail having generally parallel spaced top and bottom edges (1,3), at least the upper one (1) of which is provided with a finished surface, there being at least one and preferably a plurality of recesses (17) in a web portion (5) of the rail and wherein the recesses (17) in the web portion (5) are closed off by a thin layer of concrete (19), the concrete, including that of said layer (19) being reinforced by a plurality of short fibres. The screed rail may be in the form of a straight beam of I-section (Fig.3) or alternatively of generally L-shaped cross-section (Figs. 4 & 5). If desired, additional reinforcement (13 or 23) may be incorporated in the rail.</p> |
