| 摘要 |
A monolithically cast inverted channel is provided, in one embodiment, using a combination of mild steel mesh and pre-stressed strand. Pre-stressed strand is held in tension during casting, and draped from the outer wall to the center span. In one embodiment, pre-stressing is not needed and the molds are configured to provide a cambered roof/ceiling span. The device is cast on edge, in a self-stressing steel form, and rotated to the upright position after curing. Multiple modules can be joined edge to edge to form the building with open ends, to be closed by end caps which may be separately cast. Modules may be stacked for multi-story applications. Long-span modules, such as modules having spans of 30 feet or more, are provided. |
