| 摘要 |
<p>A molding assembly for cement or concrete staircase construction is disclosed. The assembly consists of an elongate support member and a plurality of riser support plates pivotally carried by the elongate support member with each of the riser support plates having a substantially upright edge portion and means to secure a riser board against which concrete is poured to each of the upright edges of the riser support plates. The assembly is also provided with elongate guide means which extend longitudinally of the elongate support member with the riser support plates being pivotally secured to the elongate guide means. With this arrangement longitudinal movement of the elongate guide means imparts uniform rotational movement to each of the riser support plates and results in the upright edges of the riser support plates being substantially vertical regardless of the angle of inclination of the staircase and of the support member. It is usual that the assembly is employed in pairs, but three or more such assemblies could be employed depending upon the width of the staircase.</p> |
