Prestressed construction element of composite structure and method for element fabrication

Abstract From the Canadian patent

The invention concerns a prestressed construction element of composite structure comprising a bar- or tendon-like inner part (1) of high tensile strength, a sheath part (2) of e.g. high-strength concrete or ceramic material adapted, about and precompressed by the inner part (1) and a shape-, forming structure (4) adapted about the sheath part (2) with dimensions corresponding to the desired dimensions of the construction element. According to the invention the, structure (4) is such an elastic material as is capable of taking both compression and tensile stresses without cracking. The construction in accordance with the invention achieves a strong and easily workable construction element.