| 摘要 |
PURPOSE:To facilitate manufacture and execution of a work and to make finish looking excellent by a method wherein concrete is placed in forms of a triangular cross section, and footboards are formed by embedding anchors and are arranged in juxtaposition on concrete, placed in flat forms, before the concrete is cured. CONSTITUTION:Concrete 2 is placed in forms 1 formed in a triangular cross section and having a bottom part the corner part of which has a angle near a specified angle of 90 deg.. In this case, the one end of each of anchors 3 and 3 is embedded in the concrete 2, the other end is protruded, and the given number of footboards 4... is manufactured. Flat forms 6 are mounted in a place where stairs are built to place concrete 7 therein. Before the concrete is cured, the footboards 4... are arranged in juxtaposition, and the anchors 3 and 3 are embedded in the concrete 7. |
