concrete does not dry, it cures
the post tensioning like reinforcing steel gives bending strength and has been around a very long time quite successfully.
I now see that it is used. Drying vs curing.
Potato Po tahto.
If the concrete walkway is meant to be supported by a column under that carries through to a height where cables are attached from, why wouldn’t these be in place before tensioning? This entire thing reeks of missed steps. If I am “getting this correctly” they would lift in the center of the span, while tightening the ends to cause a crown. Why not use a structure underneath that would both support and lift, adding safety and shortening the process? The support was planned, why not put it in place first?