“The front anchor is in the right location; however, it needs a back anchor to make it acceptable with sufficient margin.
The back anchor is some distance from the front anchor.
Multiple strands are tensioned to reduce stretch in the rope or cord over the back-tie distance.
The front anchor can sustain any forces applied in compression, but the post needs support for a bending (moment) force as the rigging is off the ground.
Having the anchor rigging higher is to get it off the ground, so it’s easier and safer to operate. For example, it has less friction for a rescue raise, or if you are abseiling/rappelling over an edge, it makes the transition easier.”
https://overtheedgerescue.com/rope-rescue/backtie-tension-and-compression-forces/
