Industry Survey Results on the Use of Prestressing Strand Lifting Loops

■ Survey results show general conformance to the recommendations of the PCI Design Handbook for 1⁄2 in. (13 mm) diameter strand loops but variability in many lifting-loop design parameters. Cut-off or waste prestressing strand (ASTM A416/ A416M) is often used to lift precast concrete elements at the casting yard and project site. These pieces of strands are mechanically bent into loops and cast into the concrete at the necessary embedment and projection above the surface to ensure safe lifting of the element. Prestressing strands are more commonly used than other lifting anchors because they are readily available and exhibit high strength and ductility properties, as well as being flexible and economical. Lifting-loop capacity depends on, but is not limited to, the following parameters: