Prestressed Concrete Embedded Cylinder (E-301)
Concrete structures are prestressed when predetermined compressive stresses are applied to them to counter expected future tensile stresses as a result of field loads.
In Prestressed Concrete Embedded Cylinder Pipe (E-301), prestressing is achieved by helically wrapping, under measured tension and at uniform spacing, a high tensile strength wire around the concrete core. This wire wrap places the concrete core and the embedded cylinder in compression, developing the pipe’s ability to withstand specified hydrostatic pressures and external loads with a safety factor comparable to other waterworks piping materials.
Concrete’s high compressive strength and steel’s high tensile strength are combined to form an elastic structure. This feature allows the pipe to perform even if the design working loads are exceeded.