Prodn. method for concrete beams, plates and joists - involves use of mould in which concrete is placed together with reinforcement material in form of wire framework

摘要

The framework structure (1) is placed in the mould, and is arc-formed, with its end parts arranged at the same height above the mould bottom, whilst the distance between its intermediate part and the mould bottom increases in the direction of the mould central area. The framework structure is loaded by means of tension components so that it is aligned in a straight line between its end parts and is made to maintain this alignment until the concrete hardens. Then, the tension components are removed.