In trad climbing we are often confronted with far from optimal anchors, and whilst they may never be dangerous, there is a moment of doubt in our minds. Or for the beginner it may simply be the lack of judgement over an anchor. Equalising Three Anchors help to combat these issues in a couple of ways.
It will make your belay stronger as it has more pieces of gear protecting you, it also shares the load between those piece making each less likely to fail under the same load. So for a little extra time and effort you gain massively in safety.
Equalising Three Anchors with a rope
Equalising Three Anchors with a sling and rope
This method is more common, as you can equalise two of the three points with a sling and then equalise this one joined point to the third anchor with the rope. You can take it a stage further and equalise two sets of two anchors with a sling and then link these with the rope, making a belay made up of four anchors!