A healthy tree trunk is capable of supporting incredible amounts of weight. But sometimes even these heavy lifters could use a spotter.
It is when trees start swaying around that their strength is put to the test. This can be especially worrying with trees that have multiple trunks that converge at the base. The best way to add stability is by helping different trunks support one another. This is done by installing support cables.
This was originally done with rigid, steel cables being attached to bolts screwed into the tree. However, there are new, shock absorbing, non-intrusive systems that are far superior.