Lifting inserts are variously designed metal shapes set in plastic concrete to provide a method
of lifting the concrete after it has hardened. Tilt-up panels are a good example of a type of
construction in which provision must be made for lifting.
Lifting is done, particularly in the prestressed concrete industry, by handling precast elements with
embedded strand offcuts. The problem, though, is strand slices through concrete when subject to
shear, so that it has limited use for handling thin panels. For thin shells made from normal
3,000-psi concrete containing nominal reinforcement are lifted whenever possible with inserts
located in the face of the panels. If this is not possible, designers have at their disposal a range of
slab edge products.
Experience proves that in choosing lifting inserts there are several important factors to be
considered. Cost is basic, but just as important are the effects of speed of handling and whether
are not exposed metal must be burnt off.