If i understand what you mean ...
I see local anchors made with this type of steel ... although i guess this is saved from other applications, just to make it cheap for modest fishermen.
But where i see these being massively applied is for construction, in either concrete beams or solid pavement. They call it "pre-stressed" concrete. Frames are made with rebar (if i get it) and after, fresh cement fills up the the desired structure volume. It then works by contraction, gaining more resistance. I guess in some cases the bars are laid streched with hydraulic jacks, before cement is applied and when it dries, the bars are let loose, improving the beams strength.
I may talking nonsense; if so, forget the whole thing