Elongated electric transmission or distribution pole - has longitudinal arranged reinforcing steel cables embedded in concrete in elongated housing

摘要

The composite pole, has a thin-walled metal casing, a core of non-metallic settable rigid material such as concrete, and reinforcing cables embedded in the core. The reinforcing cables extend between the ends of the casing and communicate with the case. They are pre-stressed prior to the pouring of the concrete into the casing whereby the applied pre-stress is transmitted to the casing. The reinforcing cables are secured to the casing such that the applied pre-stress remains permanently on the casing only. The method of forming the structural part includes securing one of the ends of the reinforcing members to one end of this casing and applying a predetermined stress to the reinforcing cables, securing the other ends of the reinforcing cables to the other end of the casing, pouring concret into the casing, and allowing the concrete to set whereby the stress transmitted to the casing remains permanently on the casing only and is not transmitted to the core.